[INFO] fetching crate stable-skiplist 0.1.1...
[INFO] testing stable-skiplist-0.1.1 against master#1871252fc8bb672d40787e67404e6eaae7059369 for pr-125151
[INFO] extracting crate stable-skiplist 0.1.1 into /workspace/builds/worker-2-tc1/source
[INFO] validating manifest of crates.io crate stable-skiplist 0.1.1 on toolchain 1871252fc8bb672d40787e67404e6eaae7059369
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1871252fc8bb672d40787e67404e6eaae7059369" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate stable-skiplist 0.1.1
[INFO] finished tweaking crates.io crate stable-skiplist 0.1.1
[INFO] tweaked toml for crates.io crate stable-skiplist 0.1.1 written to /workspace/builds/worker-2-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1871252fc8bb672d40787e67404e6eaae7059369" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 11 packages to latest compatible versions
[INFO] [stderr]       Adding rand v0.3.23 (latest: v0.8.5)
[INFO] [stderr]       Adding rand v0.4.6 (latest: v0.8.5)
[INFO] [stderr]       Adding rand_core v0.3.1 (latest: v0.6.4)
[INFO] [stderr]       Adding rand_core v0.4.2 (latest: v0.6.4)
[INFO] [stderr]       Adding rdrand v0.4.0 (latest: v0.8.3)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1871252fc8bb672d40787e67404e6eaae7059369" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:59a85a07ab18ca8720692f8e61effa1c651d9e2ca591e072c2b212bb91a6b8b5" "/opt/rustwide/cargo-home/bin/cargo" "+1871252fc8bb672d40787e67404e6eaae7059369" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] f13a912f1c9e21284baacfd24cd02738e420696622d40d3c631f7c0b14f1652e
[INFO] running `Command { std: "docker" "start" "-a" "f13a912f1c9e21284baacfd24cd02738e420696622d40d3c631f7c0b14f1652e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f13a912f1c9e21284baacfd24cd02738e420696622d40d3c631f7c0b14f1652e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f13a912f1c9e21284baacfd24cd02738e420696622d40d3c631f7c0b14f1652e", kill_on_drop: false }`
[INFO] [stdout] f13a912f1c9e21284baacfd24cd02738e420696622d40d3c631f7c0b14f1652e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:59a85a07ab18ca8720692f8e61effa1c651d9e2ca591e072c2b212bb91a6b8b5" "/opt/rustwide/cargo-home/bin/cargo" "+1871252fc8bb672d40787e67404e6eaae7059369" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] bc6d150305677a59cbd887e902512fa3bd06499d1a207cdca55009923199c805
[INFO] running `Command { std: "docker" "start" "-a" "bc6d150305677a59cbd887e902512fa3bd06499d1a207cdca55009923199c805", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.155
[INFO] [stderr]    Compiling rand v0.4.6
[INFO] [stderr]    Compiling rand v0.3.23
[INFO] [stderr]    Compiling stable-skiplist v0.1.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unexpected `cfg` condition value: `bench`
[INFO] [stdout]     --> src/ordered_skiplist.rs:1878:17
[INFO] [stdout]      |
[INFO] [stdout] 1878 | #[cfg(all(test, feature="bench"))]
[INFO] [stdout]      |                 ^^^^^^^^^^^^^^^
[INFO] [stdout]      |
[INFO] [stdout]      = note: expected values for `feature` are: `unstable`
[INFO] [stdout]      = help: consider adding `bench` as a feature in `Cargo.toml`
[INFO] [stdout]      = note: see <https://doc.rust-lang.org/nightly/cargo/reference/build-scripts.html#rustc-check-cfg> for more information about checking conditional configuration
[INFO] [stdout]      = note: `#[warn(unexpected_cfgs)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]     --> src/ordered_skiplist.rs:1415:9
[INFO] [stdout]      |
[INFO] [stdout] 1415 |         try!(write!(f, "["));
[INFO] [stdout]      |         ^^^
[INFO] [stdout]      |
[INFO] [stdout]      = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]     --> src/ordered_skiplist.rs:1421:13
[INFO] [stdout]      |
[INFO] [stdout] 1421 |             try!(write!(f, "{:?}", entry));
[INFO] [stdout]      |             ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]     --> src/ordered_skiplist.rs:1419:17
[INFO] [stdout]      |
[INFO] [stdout] 1419 |                 try!(write!(f, ", "));
[INFO] [stdout]      |                 ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]     --> src/ordered_skiplist.rs:1430:9
[INFO] [stdout]      |
[INFO] [stdout] 1430 |         try!(write!(f, "["));
[INFO] [stdout]      |         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]     --> src/ordered_skiplist.rs:1436:13
[INFO] [stdout]      |
[INFO] [stdout] 1436 |             try!(write!(f, "{}", entry));
[INFO] [stdout]      |             ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]     --> src/ordered_skiplist.rs:1434:17
[INFO] [stdout]      |
[INFO] [stdout] 1434 |                 try!(write!(f, ", "));
[INFO] [stdout]      |                 ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unexpected `cfg` condition value: `bench`
[INFO] [stdout]     --> src/skipmap.rs:1944:17
[INFO] [stdout]      |
[INFO] [stdout] 1944 | #[cfg(all(test, feature="bench"))]
[INFO] [stdout]      |                 ^^^^^^^^^^^^^^^
[INFO] [stdout]      |
[INFO] [stdout]      = note: expected values for `feature` are: `unstable`
[INFO] [stdout]      = help: consider adding `bench` as a feature in `Cargo.toml`
[INFO] [stdout]      = note: see <https://doc.rust-lang.org/nightly/cargo/reference/build-scripts.html#rustc-check-cfg> for more information about checking conditional configuration
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]     --> src/skipmap.rs:1356:9
[INFO] [stdout]      |
[INFO] [stdout] 1356 |         try!(write!(f, "["));
[INFO] [stdout]      |         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]     --> src/skipmap.rs:1362:13
[INFO] [stdout]      |
[INFO] [stdout] 1362 |             try!(write!(f, "({:?}, {:?})", k, v));
[INFO] [stdout]      |             ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]     --> src/skipmap.rs:1360:17
[INFO] [stdout]      |
[INFO] [stdout] 1360 |                 try!(write!(f, ", "));
[INFO] [stdout]      |                 ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]     --> src/skipmap.rs:1373:9
[INFO] [stdout]      |
[INFO] [stdout] 1373 |         try!(write!(f, "["));
[INFO] [stdout]      |         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]     --> src/skipmap.rs:1379:13
[INFO] [stdout]      |
[INFO] [stdout] 1379 |             try!(write!(f, "({}, {})", k, v));
[INFO] [stdout]      |             ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]     --> src/skipmap.rs:1377:17
[INFO] [stdout]      |
[INFO] [stdout] 1377 |                 try!(write!(f, ", "));
[INFO] [stdout]      |                 ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unexpected `cfg` condition value: `bench`
[INFO] [stdout]     --> src/skiplist.rs:1671:17
[INFO] [stdout]      |
[INFO] [stdout] 1671 | #[cfg(all(test, feature="bench"))]
[INFO] [stdout]      |                 ^^^^^^^^^^^^^^^
[INFO] [stdout]      |
[INFO] [stdout]      = note: expected values for `feature` are: `unstable`
[INFO] [stdout]      = help: consider adding `bench` as a feature in `Cargo.toml`
[INFO] [stdout]      = note: see <https://doc.rust-lang.org/nightly/cargo/reference/build-scripts.html#rustc-check-cfg> for more information about checking conditional configuration
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]     --> src/skiplist.rs:1156:9
[INFO] [stdout]      |
[INFO] [stdout] 1156 |         try!(write!(f, "["));
[INFO] [stdout]      |         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]     --> src/skiplist.rs:1162:13
[INFO] [stdout]      |
[INFO] [stdout] 1162 |             try!(write!(f, "{:?}", entry));
[INFO] [stdout]      |             ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]     --> src/skiplist.rs:1160:17
[INFO] [stdout]      |
[INFO] [stdout] 1160 |                 try!(write!(f, ", "));
[INFO] [stdout]      |                 ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]     --> src/skiplist.rs:1171:9
[INFO] [stdout]      |
[INFO] [stdout] 1171 |         try!(write!(f, "["));
[INFO] [stdout]      |         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]     --> src/skiplist.rs:1177:13
[INFO] [stdout]      |
[INFO] [stdout] 1177 |             try!(write!(f, "{}", entry));
[INFO] [stdout]      |             ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]     --> src/skiplist.rs:1175:17
[INFO] [stdout]      |
[INFO] [stdout] 1175 |                 try!(write!(f, ", "));
[INFO] [stdout]      |                 ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/ordered_skiplist.rs:44:18
[INFO] [stdout]    |
[INFO] [stdout] 44 |     compare: Box<Fn(&T, &T) -> Ordering>,
[INFO] [stdout]    |                  ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout] help: if this is an object-safe trait, use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 44 |     compare: Box<dyn Fn(&T, &T) -> Ordering>,
[INFO] [stdout]    |                  +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/ordered_skiplist.rs:81:24
[INFO] [stdout]    |
[INFO] [stdout] 81 |             })) as Box<Fn(&T, &T) -> Ordering>,
[INFO] [stdout]    |                        ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: if this is an object-safe trait, use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 81 |             })) as Box<dyn Fn(&T, &T) -> Ordering>,
[INFO] [stdout]    |                        +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/ordered_skiplist.rs:115:24
[INFO] [stdout]     |
[INFO] [stdout] 115 |             })) as Box<Fn(&T, &T) -> Ordering>,
[INFO] [stdout]     |                        ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: if this is an object-safe trait, use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 115 |             })) as Box<dyn Fn(&T, &T) -> Ordering>,
[INFO] [stdout]     |                        +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `std::mem::replace` that must be used
[INFO] [stdout]    --> src/ordered_skiplist.rs:236:17
[INFO] [stdout]     |
[INFO] [stdout] 236 |                 mem::replace(&mut (*node).next, mem::replace(&mut next.next, None));
[INFO] [stdout]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: if you don't need the old value, you can just assign the new value directly
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 236 |                 let _ = mem::replace(&mut (*node).next, mem::replace(&mut next.next, None));
[INFO] [stdout]     |                 +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `std::mem::replace` that must be used
[INFO] [stdout]    --> src/ordered_skiplist.rs:241:9
[INFO] [stdout]     |
[INFO] [stdout] 241 |         mem::replace(&mut self.head, new_head);
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: if you don't need the old value, you can just assign the new value directly
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 241 |         let _ = mem::replace(&mut self.head, new_head);
[INFO] [stdout]     |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `std::mem::replace` that must be used
[INFO] [stdout]    --> src/ordered_skiplist.rs:847:21
[INFO] [stdout]     |
[INFO] [stdout] 847 |                     mem::replace(&mut (*prev).next, mem::replace(&mut (*node).next, None));
[INFO] [stdout]     |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: if you don't need the old value, you can just assign the new value directly
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 847 |                     let _ = mem::replace(&mut (*prev).next, mem::replace(&mut (*node).next, None));
[INFO] [stdout]     |                     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `std::mem::replace` that must be used
[INFO] [stdout]    --> src/ordered_skiplist.rs:922:21
[INFO] [stdout]     |
[INFO] [stdout] 922 |                     mem::replace(&mut (*prev).next, mem::replace(&mut (*node).next, None));
[INFO] [stdout]     |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: if you don't need the old value, you can just assign the new value directly
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 922 |                     let _ = mem::replace(&mut (*prev).next, mem::replace(&mut (*node).next, None));
[INFO] [stdout]     |                     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `std::mem::replace` that must be used
[INFO] [stdout]     --> src/ordered_skiplist.rs:1347:17
[INFO] [stdout]      |
[INFO] [stdout] 1347 |                 mem::replace(&mut (*node).next, mem::replace(&mut next.next, None));
[INFO] [stdout]      |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]      |
[INFO] [stdout]      = note: if you don't need the old value, you can just assign the new value directly
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]      |
[INFO] [stdout] 1347 |                 let _ = mem::replace(&mut (*node).next, mem::replace(&mut next.next, None));
[INFO] [stdout]      |                 +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `std::mem::replace` that must be used
[INFO] [stdout]    --> src/skipmap.rs:308:17
[INFO] [stdout]     |
[INFO] [stdout] 308 |                 mem::replace(&mut (*node).next, mem::replace(&mut next.next, None));
[INFO] [stdout]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: if you don't need the old value, you can just assign the new value directly
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 308 |                 let _ = mem::replace(&mut (*node).next, mem::replace(&mut next.next, None));
[INFO] [stdout]     |                 +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `std::mem::replace` that must be used
[INFO] [stdout]    --> src/skipmap.rs:313:9
[INFO] [stdout]     |
[INFO] [stdout] 313 |         mem::replace(&mut self.head, new_head);
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: if you don't need the old value, you can just assign the new value directly
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 313 |         let _ = mem::replace(&mut self.head, new_head);
[INFO] [stdout]     |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `std::mem::replace` that must be used
[INFO] [stdout]     --> src/skipmap.rs:1255:17
[INFO] [stdout]      |
[INFO] [stdout] 1255 |                 mem::replace(&mut (*node).next, mem::replace(&mut next.next, None));
[INFO] [stdout]      |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]      |
[INFO] [stdout]      = note: if you don't need the old value, you can just assign the new value directly
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]      |
[INFO] [stdout] 1255 |                 let _ = mem::replace(&mut (*node).next, mem::replace(&mut next.next, None));
[INFO] [stdout]      |                 +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `std::mem::replace` that must be used
[INFO] [stdout]   --> src/skiplist.rs:94:17
[INFO] [stdout]    |
[INFO] [stdout] 94 |                 mem::replace(&mut (*node).next, mem::replace(&mut next.next, None));
[INFO] [stdout]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: if you don't need the old value, you can just assign the new value directly
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 94 |                 let _ = mem::replace(&mut (*node).next, mem::replace(&mut next.next, None));
[INFO] [stdout]    |                 +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `std::mem::replace` that must be used
[INFO] [stdout]   --> src/skiplist.rs:99:9
[INFO] [stdout]    |
[INFO] [stdout] 99 |         mem::replace(&mut self.head, new_head);
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: if you don't need the old value, you can just assign the new value directly
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 99 |         let _ = mem::replace(&mut self.head, new_head);
[INFO] [stdout]    |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `std::mem::replace` that must be used
[INFO] [stdout]    --> src/skiplist.rs:567:21
[INFO] [stdout]     |
[INFO] [stdout] 567 |                     mem::replace(&mut (*prev).next, mem::replace(&mut (*node).next, None));
[INFO] [stdout]     |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: if you don't need the old value, you can just assign the new value directly
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 567 |                     let _ = mem::replace(&mut (*prev).next, mem::replace(&mut (*node).next, None));
[INFO] [stdout]     |                     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `std::mem::replace` that must be used
[INFO] [stdout]    --> src/skiplist.rs:863:21
[INFO] [stdout]     |
[INFO] [stdout] 863 |                     mem::replace(&mut (*prev).next, mem::replace(&mut (*node).next, None));
[INFO] [stdout]     |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: if you don't need the old value, you can just assign the new value directly
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 863 |                     let _ = mem::replace(&mut (*prev).next, mem::replace(&mut (*node).next, None));
[INFO] [stdout]     |                     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `std::mem::replace` that must be used
[INFO] [stdout]     --> src/skiplist.rs:1088:17
[INFO] [stdout]      |
[INFO] [stdout] 1088 |                 mem::replace(&mut (*node).next, mem::replace(&mut next.next, None));
[INFO] [stdout]      |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]      |
[INFO] [stdout]      = note: if you don't need the old value, you can just assign the new value directly
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]      |
[INFO] [stdout] 1088 |                 let _ = mem::replace(&mut (*node).next, mem::replace(&mut next.next, None));
[INFO] [stdout]      |                 +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 37 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 2.41s
[INFO] running `Command { std: "docker" "inspect" "bc6d150305677a59cbd887e902512fa3bd06499d1a207cdca55009923199c805", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bc6d150305677a59cbd887e902512fa3bd06499d1a207cdca55009923199c805", kill_on_drop: false }`
[INFO] [stdout] bc6d150305677a59cbd887e902512fa3bd06499d1a207cdca55009923199c805
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:59a85a07ab18ca8720692f8e61effa1c651d9e2ca591e072c2b212bb91a6b8b5" "/opt/rustwide/cargo-home/bin/cargo" "+1871252fc8bb672d40787e67404e6eaae7059369" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] abe6889829b5b0ac7887b03a38dfba9eb98db1505571cb58e348a78ce27d3202
[INFO] running `Command { std: "docker" "start" "-a" "abe6889829b5b0ac7887b03a38dfba9eb98db1505571cb58e348a78ce27d3202", kill_on_drop: false }`
[INFO] [stdout] warning: unexpected `cfg` condition value: `bench`
[INFO] [stdout]     --> src/ordered_skiplist.rs:1878:17
[INFO] [stdout]      |
[INFO] [stdout] 1878 | #[cfg(all(test, feature="bench"))]
[INFO] [stdout]      |                 ^^^^^^^^^^^^^^^
[INFO] [stdout]      |
[INFO] [stdout]      = note: expected values for `feature` are: `unstable`
[INFO] [stdout]      = help: consider adding `bench` as a feature in `Cargo.toml`
[INFO] [stdout]      = note: see <https://doc.rust-lang.org/nightly/cargo/reference/build-scripts.html#rustc-check-cfg> for more information about checking conditional configuration
[INFO] [stdout]      = note: `#[warn(unexpected_cfgs)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]     --> src/ordered_skiplist.rs:1415:9
[INFO] [stdout]      |
[INFO] [stdout] 1415 |         try!(write!(f, "["));
[INFO] [stdout]      |         ^^^
[INFO] [stdout]      |
[INFO] [stdout]      = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]     --> src/ordered_skiplist.rs:1421:13
[INFO] [stdout]      |
[INFO] [stdout] 1421 |             try!(write!(f, "{:?}", entry));
[INFO] [stdout]      |             ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]     --> src/ordered_skiplist.rs:1419:17
[INFO] [stdout]      |
[INFO] [stdout] 1419 |                 try!(write!(f, ", "));
[INFO] [stdout]      |                 ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]     --> src/ordered_skiplist.rs:1430:9
[INFO] [stdout]      |
[INFO] [stdout] 1430 |         try!(write!(f, "["));
[INFO] [stdout]      |         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]     --> src/ordered_skiplist.rs:1436:13
[INFO] [stdout]      |
[INFO] [stdout] 1436 |             try!(write!(f, "{}", entry));
[INFO] [stdout]      |             ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]     --> src/ordered_skiplist.rs:1434:17
[INFO] [stdout]      |
[INFO] [stdout] 1434 |                 try!(write!(f, ", "));
[INFO] [stdout]      |                 ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unexpected `cfg` condition value: `bench`
[INFO] [stdout]     --> src/skipmap.rs:1944:17
[INFO] [stdout]      |
[INFO] [stdout] 1944 | #[cfg(all(test, feature="bench"))]
[INFO] [stdout]      |                 ^^^^^^^^^^^^^^^
[INFO] [stdout]      |
[INFO] [stdout]      = note: expected values for `feature` are: `unstable`
[INFO] [stdout]      = help: consider adding `bench` as a feature in `Cargo.toml`
[INFO] [stdout]      = note: see <https://doc.rust-lang.org/nightly/cargo/reference/build-scripts.html#rustc-check-cfg> for more information about checking conditional configuration
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]     --> src/skipmap.rs:1356:9
[INFO] [stdout]      |
[INFO] [stdout] 1356 |         try!(write!(f, "["));
[INFO] [stdout]      |         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]     --> src/skipmap.rs:1362:13
[INFO] [stdout]      |
[INFO] [stdout] 1362 |             try!(write!(f, "({:?}, {:?})", k, v));
[INFO] [stdout]      |             ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]     --> src/skipmap.rs:1360:17
[INFO] [stdout]      |
[INFO] [stdout] 1360 |                 try!(write!(f, ", "));
[INFO] [stdout]      |                 ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]     --> src/skipmap.rs:1373:9
[INFO] [stdout]      |
[INFO] [stdout] 1373 |         try!(write!(f, "["));
[INFO] [stdout]      |         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]     --> src/skipmap.rs:1379:13
[INFO] [stdout]      |
[INFO] [stdout] 1379 |             try!(write!(f, "({}, {})", k, v));
[INFO] [stdout]      |             ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]     --> src/skipmap.rs:1377:17
[INFO] [stdout]      |
[INFO] [stdout] 1377 |                 try!(write!(f, ", "));
[INFO] [stdout]      |                 ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unexpected `cfg` condition value: `bench`
[INFO] [stdout]     --> src/skiplist.rs:1671:17
[INFO] [stdout]      |
[INFO] [stdout] 1671 | #[cfg(all(test, feature="bench"))]
[INFO] [stdout]      |                 ^^^^^^^^^^^^^^^
[INFO] [stdout]      |
[INFO] [stdout]      = note: expected values for `feature` are: `unstable`
[INFO] [stdout]      = help: consider adding `bench` as a feature in `Cargo.toml`
[INFO] [stdout]      = note: see <https://doc.rust-lang.org/nightly/cargo/reference/build-scripts.html#rustc-check-cfg> for more information about checking conditional configuration
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]     --> src/skiplist.rs:1156:9
[INFO] [stdout]      |
[INFO] [stdout] 1156 |         try!(write!(f, "["));
[INFO] [stdout]      |         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]     --> src/skiplist.rs:1162:13
[INFO] [stdout]      |
[INFO] [stdout] 1162 |             try!(write!(f, "{:?}", entry));
[INFO] [stdout]      |             ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]     --> src/skiplist.rs:1160:17
[INFO] [stdout]      |
[INFO] [stdout] 1160 |                 try!(write!(f, ", "));
[INFO] [stdout]      |                 ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]     --> src/skiplist.rs:1171:9
[INFO] [stdout]      |
[INFO] [stdout] 1171 |         try!(write!(f, "["));
[INFO] [stdout]      |         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]     --> src/skiplist.rs:1177:13
[INFO] [stdout]      |
[INFO] [stdout] 1177 |             try!(write!(f, "{}", entry));
[INFO] [stdout]      |             ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]     --> src/skiplist.rs:1175:17
[INFO] [stdout]      |
[INFO] [stdout] 1175 |                 try!(write!(f, ", "));
[INFO] [stdout]      |                 ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/ordered_skiplist.rs:44:18
[INFO] [stdout]    |
[INFO] [stdout] 44 |     compare: Box<Fn(&T, &T) -> Ordering>,
[INFO] [stdout]    |                  ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout] help: if this is an object-safe trait, use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 44 |     compare: Box<dyn Fn(&T, &T) -> Ordering>,
[INFO] [stdout]    |                  +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/ordered_skiplist.rs:81:24
[INFO] [stdout]    |
[INFO] [stdout] 81 |             })) as Box<Fn(&T, &T) -> Ordering>,
[INFO] [stdout]    |                        ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: if this is an object-safe trait, use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 81 |             })) as Box<dyn Fn(&T, &T) -> Ordering>,
[INFO] [stdout]    |                        +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/ordered_skiplist.rs:115:24
[INFO] [stdout]     |
[INFO] [stdout] 115 |             })) as Box<Fn(&T, &T) -> Ordering>,
[INFO] [stdout]     |                        ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: if this is an object-safe trait, use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 115 |             })) as Box<dyn Fn(&T, &T) -> Ordering>,
[INFO] [stdout]     |                        +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `std::mem::replace` that must be used
[INFO] [stdout]    --> src/ordered_skiplist.rs:236:17
[INFO] [stdout]     |
[INFO] [stdout] 236 |                 mem::replace(&mut (*node).next, mem::replace(&mut next.next, None));
[INFO] [stdout]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: if you don't need the old value, you can just assign the new value directly
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 236 |                 let _ = mem::replace(&mut (*node).next, mem::replace(&mut next.next, None));
[INFO] [stdout]     |                 +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `std::mem::replace` that must be used
[INFO] [stdout]    --> src/ordered_skiplist.rs:241:9
[INFO] [stdout]     |
[INFO] [stdout] 241 |         mem::replace(&mut self.head, new_head);
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: if you don't need the old value, you can just assign the new value directly
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 241 |         let _ = mem::replace(&mut self.head, new_head);
[INFO] [stdout]     |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `std::mem::replace` that must be used
[INFO] [stdout]    --> src/ordered_skiplist.rs:847:21
[INFO] [stdout]     |
[INFO] [stdout] 847 |                     mem::replace(&mut (*prev).next, mem::replace(&mut (*node).next, None));
[INFO] [stdout]     |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: if you don't need the old value, you can just assign the new value directly
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 847 |                     let _ = mem::replace(&mut (*prev).next, mem::replace(&mut (*node).next, None));
[INFO] [stdout]     |                     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `std::mem::replace` that must be used
[INFO] [stdout]    --> src/ordered_skiplist.rs:922:21
[INFO] [stdout]     |
[INFO] [stdout] 922 |                     mem::replace(&mut (*prev).next, mem::replace(&mut (*node).next, None));
[INFO] [stdout]     |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: if you don't need the old value, you can just assign the new value directly
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 922 |                     let _ = mem::replace(&mut (*prev).next, mem::replace(&mut (*node).next, None));
[INFO] [stdout]     |                     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `std::mem::replace` that must be used
[INFO] [stdout]     --> src/ordered_skiplist.rs:1347:17
[INFO] [stdout]      |
[INFO] [stdout] 1347 |                 mem::replace(&mut (*node).next, mem::replace(&mut next.next, None));
[INFO] [stdout]      |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]      |
[INFO] [stdout]      = note: if you don't need the old value, you can just assign the new value directly
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]      |
[INFO] [stdout] 1347 |                 let _ = mem::replace(&mut (*node).next, mem::replace(&mut next.next, None));
[INFO] [stdout]      |                 +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `std::mem::replace` that must be used
[INFO] [stdout]    --> src/skipmap.rs:308:17
[INFO] [stdout]     |
[INFO] [stdout] 308 |                 mem::replace(&mut (*node).next, mem::replace(&mut next.next, None));
[INFO] [stdout]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: if you don't need the old value, you can just assign the new value directly
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 308 |                 let _ = mem::replace(&mut (*node).next, mem::replace(&mut next.next, None));
[INFO] [stdout]     |                 +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `std::mem::replace` that must be used
[INFO] [stdout]    --> src/skipmap.rs:313:9
[INFO] [stdout]     |
[INFO] [stdout] 313 |         mem::replace(&mut self.head, new_head);
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: if you don't need the old value, you can just assign the new value directly
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 313 |         let _ = mem::replace(&mut self.head, new_head);
[INFO] [stdout]     |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `std::mem::replace` that must be used
[INFO] [stdout]     --> src/skipmap.rs:1255:17
[INFO] [stdout]      |
[INFO] [stdout] 1255 |                 mem::replace(&mut (*node).next, mem::replace(&mut next.next, None));
[INFO] [stdout]      |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]      |
[INFO] [stdout]      = note: if you don't need the old value, you can just assign the new value directly
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]      |
[INFO] [stdout] 1255 |                 let _ = mem::replace(&mut (*node).next, mem::replace(&mut next.next, None));
[INFO] [stdout]      |                 +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `std::mem::replace` that must be used
[INFO] [stdout]   --> src/skiplist.rs:94:17
[INFO] [stdout]    |
[INFO] [stdout] 94 |                 mem::replace(&mut (*node).next, mem::replace(&mut next.next, None));
[INFO] [stdout]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: if you don't need the old value, you can just assign the new value directly
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 94 |                 let _ = mem::replace(&mut (*node).next, mem::replace(&mut next.next, None));
[INFO] [stdout]    |                 +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `std::mem::replace` that must be used
[INFO] [stdout]   --> src/skiplist.rs:99:9
[INFO] [stdout]    |
[INFO] [stdout] 99 |         mem::replace(&mut self.head, new_head);
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: if you don't need the old value, you can just assign the new value directly
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 99 |         let _ = mem::replace(&mut self.head, new_head);
[INFO] [stdout]    |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `std::mem::replace` that must be used
[INFO] [stdout]    --> src/skiplist.rs:567:21
[INFO] [stdout]     |
[INFO] [stdout] 567 |                     mem::replace(&mut (*prev).next, mem::replace(&mut (*node).next, None));
[INFO] [stdout]     |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: if you don't need the old value, you can just assign the new value directly
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 567 |                     let _ = mem::replace(&mut (*prev).next, mem::replace(&mut (*node).next, None));
[INFO] [stdout]     |                     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `std::mem::replace` that must be used
[INFO] [stdout]    --> src/skiplist.rs:863:21
[INFO] [stdout]     |
[INFO] [stdout] 863 |                     mem::replace(&mut (*prev).next, mem::replace(&mut (*node).next, None));
[INFO] [stdout]     |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: if you don't need the old value, you can just assign the new value directly
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 863 |                     let _ = mem::replace(&mut (*prev).next, mem::replace(&mut (*node).next, None));
[INFO] [stdout]     |                     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `std::mem::replace` that must be used
[INFO] [stdout]     --> src/skiplist.rs:1088:17
[INFO] [stdout]      |
[INFO] [stdout] 1088 |                 mem::replace(&mut (*node).next, mem::replace(&mut next.next, None));
[INFO] [stdout]      |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]      |
[INFO] [stdout]      = note: if you don't need the old value, you can just assign the new value directly
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]      |
[INFO] [stdout] 1088 |                 let _ = mem::replace(&mut (*node).next, mem::replace(&mut next.next, None));
[INFO] [stdout]      |                 +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 37 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling stable-skiplist v0.1.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unexpected `cfg` condition value: `bench`
[INFO] [stdout]     --> src/ordered_skiplist.rs:1878:17
[INFO] [stdout]      |
[INFO] [stdout] 1878 | #[cfg(all(test, feature="bench"))]
[INFO] [stdout]      |                 ^^^^^^^^^^^^^^^
[INFO] [stdout]      |
[INFO] [stdout]      = note: expected values for `feature` are: `unstable`
[INFO] [stdout]      = help: consider adding `bench` as a feature in `Cargo.toml`
[INFO] [stdout]      = note: see <https://doc.rust-lang.org/nightly/cargo/reference/build-scripts.html#rustc-check-cfg> for more information about checking conditional configuration
[INFO] [stdout]      = note: `#[warn(unexpected_cfgs)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]     --> src/ordered_skiplist.rs:1415:9
[INFO] [stdout]      |
[INFO] [stdout] 1415 |         try!(write!(f, "["));
[INFO] [stdout]      |         ^^^
[INFO] [stdout]      |
[INFO] [stdout]      = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]     --> src/ordered_skiplist.rs:1421:13
[INFO] [stdout]      |
[INFO] [stdout] 1421 |             try!(write!(f, "{:?}", entry));
[INFO] [stdout]      |             ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]     --> src/ordered_skiplist.rs:1419:17
[INFO] [stdout]      |
[INFO] [stdout] 1419 |                 try!(write!(f, ", "));
[INFO] [stdout]      |                 ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]     --> src/ordered_skiplist.rs:1430:9
[INFO] [stdout]      |
[INFO] [stdout] 1430 |         try!(write!(f, "["));
[INFO] [stdout]      |         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]     --> src/ordered_skiplist.rs:1436:13
[INFO] [stdout]      |
[INFO] [stdout] 1436 |             try!(write!(f, "{}", entry));
[INFO] [stdout]      |             ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]     --> src/ordered_skiplist.rs:1434:17
[INFO] [stdout]      |
[INFO] [stdout] 1434 |                 try!(write!(f, ", "));
[INFO] [stdout]      |                 ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unexpected `cfg` condition value: `bench`
[INFO] [stdout]     --> src/skipmap.rs:1944:17
[INFO] [stdout]      |
[INFO] [stdout] 1944 | #[cfg(all(test, feature="bench"))]
[INFO] [stdout]      |                 ^^^^^^^^^^^^^^^
[INFO] [stdout]      |
[INFO] [stdout]      = note: expected values for `feature` are: `unstable`
[INFO] [stdout]      = help: consider adding `bench` as a feature in `Cargo.toml`
[INFO] [stdout]      = note: see <https://doc.rust-lang.org/nightly/cargo/reference/build-scripts.html#rustc-check-cfg> for more information about checking conditional configuration
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]     --> src/skipmap.rs:1356:9
[INFO] [stdout]      |
[INFO] [stdout] 1356 |         try!(write!(f, "["));
[INFO] [stdout]      |         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]     --> src/skipmap.rs:1362:13
[INFO] [stdout]      |
[INFO] [stdout] 1362 |             try!(write!(f, "({:?}, {:?})", k, v));
[INFO] [stdout]      |             ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]     --> src/skipmap.rs:1360:17
[INFO] [stdout]      |
[INFO] [stdout] 1360 |                 try!(write!(f, ", "));
[INFO] [stdout]      |                 ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]     --> src/skipmap.rs:1373:9
[INFO] [stdout]      |
[INFO] [stdout] 1373 |         try!(write!(f, "["));
[INFO] [stdout]      |         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]     --> src/skipmap.rs:1379:13
[INFO] [stdout]      |
[INFO] [stdout] 1379 |             try!(write!(f, "({}, {})", k, v));
[INFO] [stdout]      |             ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]     --> src/skipmap.rs:1377:17
[INFO] [stdout]      |
[INFO] [stdout] 1377 |                 try!(write!(f, ", "));
[INFO] [stdout]      |                 ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unexpected `cfg` condition value: `bench`
[INFO] [stdout]     --> src/skiplist.rs:1671:17
[INFO] [stdout]      |
[INFO] [stdout] 1671 | #[cfg(all(test, feature="bench"))]
[INFO] [stdout]      |                 ^^^^^^^^^^^^^^^
[INFO] [stdout]      |
[INFO] [stdout]      = note: expected values for `feature` are: `unstable`
[INFO] [stdout]      = help: consider adding `bench` as a feature in `Cargo.toml`
[INFO] [stdout]      = note: see <https://doc.rust-lang.org/nightly/cargo/reference/build-scripts.html#rustc-check-cfg> for more information about checking conditional configuration
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]     --> src/skiplist.rs:1156:9
[INFO] [stdout]      |
[INFO] [stdout] 1156 |         try!(write!(f, "["));
[INFO] [stdout]      |         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]     --> src/skiplist.rs:1162:13
[INFO] [stdout]      |
[INFO] [stdout] 1162 |             try!(write!(f, "{:?}", entry));
[INFO] [stdout]      |             ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]     --> src/skiplist.rs:1160:17
[INFO] [stdout]      |
[INFO] [stdout] 1160 |                 try!(write!(f, ", "));
[INFO] [stdout]      |                 ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]     --> src/skiplist.rs:1171:9
[INFO] [stdout]      |
[INFO] [stdout] 1171 |         try!(write!(f, "["));
[INFO] [stdout]      |         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]     --> src/skiplist.rs:1177:13
[INFO] [stdout]      |
[INFO] [stdout] 1177 |             try!(write!(f, "{}", entry));
[INFO] [stdout]      |             ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]     --> src/skiplist.rs:1175:17
[INFO] [stdout]      |
[INFO] [stdout] 1175 |                 try!(write!(f, ", "));
[INFO] [stdout]      |                 ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/ordered_skiplist.rs:44:18
[INFO] [stdout]    |
[INFO] [stdout] 44 |     compare: Box<Fn(&T, &T) -> Ordering>,
[INFO] [stdout]    |                  ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout] help: if this is an object-safe trait, use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 44 |     compare: Box<dyn Fn(&T, &T) -> Ordering>,
[INFO] [stdout]    |                  +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/ordered_skiplist.rs:81:24
[INFO] [stdout]    |
[INFO] [stdout] 81 |             })) as Box<Fn(&T, &T) -> Ordering>,
[INFO] [stdout]    |                        ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: if this is an object-safe trait, use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 81 |             })) as Box<dyn Fn(&T, &T) -> Ordering>,
[INFO] [stdout]    |                        +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/ordered_skiplist.rs:115:24
[INFO] [stdout]     |
[INFO] [stdout] 115 |             })) as Box<Fn(&T, &T) -> Ordering>,
[INFO] [stdout]     |                        ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: if this is an object-safe trait, use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 115 |             })) as Box<dyn Fn(&T, &T) -> Ordering>,
[INFO] [stdout]     |                        +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `std::mem::replace` that must be used
[INFO] [stdout]    --> src/ordered_skiplist.rs:236:17
[INFO] [stdout]     |
[INFO] [stdout] 236 |                 mem::replace(&mut (*node).next, mem::replace(&mut next.next, None));
[INFO] [stdout]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: if you don't need the old value, you can just assign the new value directly
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 236 |                 let _ = mem::replace(&mut (*node).next, mem::replace(&mut next.next, None));
[INFO] [stdout]     |                 +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `std::mem::replace` that must be used
[INFO] [stdout]    --> src/ordered_skiplist.rs:241:9
[INFO] [stdout]     |
[INFO] [stdout] 241 |         mem::replace(&mut self.head, new_head);
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: if you don't need the old value, you can just assign the new value directly
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 241 |         let _ = mem::replace(&mut self.head, new_head);
[INFO] [stdout]     |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `std::mem::replace` that must be used
[INFO] [stdout]    --> src/ordered_skiplist.rs:847:21
[INFO] [stdout]     |
[INFO] [stdout] 847 |                     mem::replace(&mut (*prev).next, mem::replace(&mut (*node).next, None));
[INFO] [stdout]     |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: if you don't need the old value, you can just assign the new value directly
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 847 |                     let _ = mem::replace(&mut (*prev).next, mem::replace(&mut (*node).next, None));
[INFO] [stdout]     |                     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `std::mem::replace` that must be used
[INFO] [stdout]    --> src/ordered_skiplist.rs:922:21
[INFO] [stdout]     |
[INFO] [stdout] 922 |                     mem::replace(&mut (*prev).next, mem::replace(&mut (*node).next, None));
[INFO] [stdout]     |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: if you don't need the old value, you can just assign the new value directly
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 922 |                     let _ = mem::replace(&mut (*prev).next, mem::replace(&mut (*node).next, None));
[INFO] [stdout]     |                     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `std::mem::replace` that must be used
[INFO] [stdout]     --> src/ordered_skiplist.rs:1347:17
[INFO] [stdout]      |
[INFO] [stdout] 1347 |                 mem::replace(&mut (*node).next, mem::replace(&mut next.next, None));
[INFO] [stdout]      |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]      |
[INFO] [stdout]      = note: if you don't need the old value, you can just assign the new value directly
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]      |
[INFO] [stdout] 1347 |                 let _ = mem::replace(&mut (*node).next, mem::replace(&mut next.next, None));
[INFO] [stdout]      |                 +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `std::mem::replace` that must be used
[INFO] [stdout]    --> src/skipmap.rs:308:17
[INFO] [stdout]     |
[INFO] [stdout] 308 |                 mem::replace(&mut (*node).next, mem::replace(&mut next.next, None));
[INFO] [stdout]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: if you don't need the old value, you can just assign the new value directly
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 308 |                 let _ = mem::replace(&mut (*node).next, mem::replace(&mut next.next, None));
[INFO] [stdout]     |                 +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `std::mem::replace` that must be used
[INFO] [stdout]    --> src/skipmap.rs:313:9
[INFO] [stdout]     |
[INFO] [stdout] 313 |         mem::replace(&mut self.head, new_head);
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: if you don't need the old value, you can just assign the new value directly
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 313 |         let _ = mem::replace(&mut self.head, new_head);
[INFO] [stdout]     |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `std::mem::replace` that must be used
[INFO] [stdout]     --> src/skipmap.rs:1255:17
[INFO] [stdout]      |
[INFO] [stdout] 1255 |                 mem::replace(&mut (*node).next, mem::replace(&mut next.next, None));
[INFO] [stdout]      |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]      |
[INFO] [stdout]      = note: if you don't need the old value, you can just assign the new value directly
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]      |
[INFO] [stdout] 1255 |                 let _ = mem::replace(&mut (*node).next, mem::replace(&mut next.next, None));
[INFO] [stdout]      |                 +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `std::mem::replace` that must be used
[INFO] [stdout]   --> src/skiplist.rs:94:17
[INFO] [stdout]    |
[INFO] [stdout] 94 |                 mem::replace(&mut (*node).next, mem::replace(&mut next.next, None));
[INFO] [stdout]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: if you don't need the old value, you can just assign the new value directly
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 94 |                 let _ = mem::replace(&mut (*node).next, mem::replace(&mut next.next, None));
[INFO] [stdout]    |                 +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `std::mem::replace` that must be used
[INFO] [stdout]   --> src/skiplist.rs:99:9
[INFO] [stdout]    |
[INFO] [stdout] 99 |         mem::replace(&mut self.head, new_head);
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: if you don't need the old value, you can just assign the new value directly
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 99 |         let _ = mem::replace(&mut self.head, new_head);
[INFO] [stdout]    |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `std::mem::replace` that must be used
[INFO] [stdout]    --> src/skiplist.rs:567:21
[INFO] [stdout]     |
[INFO] [stdout] 567 |                     mem::replace(&mut (*prev).next, mem::replace(&mut (*node).next, None));
[INFO] [stdout]     |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: if you don't need the old value, you can just assign the new value directly
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 567 |                     let _ = mem::replace(&mut (*prev).next, mem::replace(&mut (*node).next, None));
[INFO] [stdout]     |                     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `std::mem::replace` that must be used
[INFO] [stdout]    --> src/skiplist.rs:863:21
[INFO] [stdout]     |
[INFO] [stdout] 863 |                     mem::replace(&mut (*prev).next, mem::replace(&mut (*node).next, None));
[INFO] [stdout]     |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: if you don't need the old value, you can just assign the new value directly
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 863 |                     let _ = mem::replace(&mut (*prev).next, mem::replace(&mut (*node).next, None));
[INFO] [stdout]     |                     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `std::mem::replace` that must be used
[INFO] [stdout]     --> src/skiplist.rs:1088:17
[INFO] [stdout]      |
[INFO] [stdout] 1088 |                 mem::replace(&mut (*node).next, mem::replace(&mut next.next, None));
[INFO] [stdout]      |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]      |
[INFO] [stdout]      = note: if you don't need the old value, you can just assign the new value directly
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]      |
[INFO] [stdout] 1088 |                 let _ = mem::replace(&mut (*node).next, mem::replace(&mut next.next, None));
[INFO] [stdout]      |                 +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 37 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 1.58s
[INFO] running `Command { std: "docker" "inspect" "abe6889829b5b0ac7887b03a38dfba9eb98db1505571cb58e348a78ce27d3202", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "abe6889829b5b0ac7887b03a38dfba9eb98db1505571cb58e348a78ce27d3202", kill_on_drop: false }`
[INFO] [stdout] abe6889829b5b0ac7887b03a38dfba9eb98db1505571cb58e348a78ce27d3202
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:59a85a07ab18ca8720692f8e61effa1c651d9e2ca591e072c2b212bb91a6b8b5" "/opt/rustwide/cargo-home/bin/cargo" "+1871252fc8bb672d40787e67404e6eaae7059369" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 439103c2f5329f159f9627b49e1bdcdc2228607c71274d3a120ab6f1a06af8e0
[INFO] running `Command { std: "docker" "start" "-a" "439103c2f5329f159f9627b49e1bdcdc2228607c71274d3a120ab6f1a06af8e0", kill_on_drop: false }`
[INFO] [stderr] warning: unexpected `cfg` condition value: `bench`
[INFO] [stderr]     --> src/ordered_skiplist.rs:1878:17
[INFO] [stderr]      |
[INFO] [stderr] 1878 | #[cfg(all(test, feature="bench"))]
[INFO] [stderr]      |                 ^^^^^^^^^^^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: expected values for `feature` are: `unstable`
[INFO] [stderr]      = help: consider adding `bench` as a feature in `Cargo.toml`
[INFO] [stderr]      = note: see <https://doc.rust-lang.org/nightly/cargo/reference/build-scripts.html#rustc-check-cfg> for more information about checking conditional configuration
[INFO] [stderr]      = note: `#[warn(unexpected_cfgs)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stderr]     --> src/ordered_skiplist.rs:1415:9
[INFO] [stderr]      |
[INFO] [stderr] 1415 |         try!(write!(f, "["));
[INFO] [stderr]      |         ^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: `#[warn(deprecated)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stderr]     --> src/ordered_skiplist.rs:1421:13
[INFO] [stderr]      |
[INFO] [stderr] 1421 |             try!(write!(f, "{:?}", entry));
[INFO] [stderr]      |             ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stderr]     --> src/ordered_skiplist.rs:1419:17
[INFO] [stderr]      |
[INFO] [stderr] 1419 |                 try!(write!(f, ", "));
[INFO] [stderr]      |                 ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stderr]     --> src/ordered_skiplist.rs:1430:9
[INFO] [stderr]      |
[INFO] [stderr] 1430 |         try!(write!(f, "["));
[INFO] [stderr]      |         ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stderr]     --> src/ordered_skiplist.rs:1436:13
[INFO] [stderr]      |
[INFO] [stderr] 1436 |             try!(write!(f, "{}", entry));
[INFO] [stderr]      |             ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stderr]     --> src/ordered_skiplist.rs:1434:17
[INFO] [stderr]      |
[INFO] [stderr] 1434 |                 try!(write!(f, ", "));
[INFO] [stderr]      |                 ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unexpected `cfg` condition value: `bench`
[INFO] [stderr]     --> src/skipmap.rs:1944:17
[INFO] [stderr]      |
[INFO] [stderr] 1944 | #[cfg(all(test, feature="bench"))]
[INFO] [stderr]      |                 ^^^^^^^^^^^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: expected values for `feature` are: `unstable`
[INFO] [stderr]      = help: consider adding `bench` as a feature in `Cargo.toml`
[INFO] [stderr]      = note: see <https://doc.rust-lang.org/nightly/cargo/reference/build-scripts.html#rustc-check-cfg> for more information about checking conditional configuration
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stderr]     --> src/skipmap.rs:1356:9
[INFO] [stderr]      |
[INFO] [stderr] 1356 |         try!(write!(f, "["));
[INFO] [stderr]      |         ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stderr]     --> src/skipmap.rs:1362:13
[INFO] [stderr]      |
[INFO] [stderr] 1362 |             try!(write!(f, "({:?}, {:?})", k, v));
[INFO] [stderr]      |             ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stderr]     --> src/skipmap.rs:1360:17
[INFO] [stderr]      |
[INFO] [stderr] 1360 |                 try!(write!(f, ", "));
[INFO] [stderr]      |                 ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stderr]     --> src/skipmap.rs:1373:9
[INFO] [stderr]      |
[INFO] [stderr] 1373 |         try!(write!(f, "["));
[INFO] [stderr]      |         ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stderr]     --> src/skipmap.rs:1379:13
[INFO] [stderr]      |
[INFO] [stderr] 1379 |             try!(write!(f, "({}, {})", k, v));
[INFO] [stderr]      |             ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stderr]     --> src/skipmap.rs:1377:17
[INFO] [stderr]      |
[INFO] [stderr] 1377 |                 try!(write!(f, ", "));
[INFO] [stderr]      |                 ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unexpected `cfg` condition value: `bench`
[INFO] [stderr]     --> src/skiplist.rs:1671:17
[INFO] [stderr]      |
[INFO] [stderr] 1671 | #[cfg(all(test, feature="bench"))]
[INFO] [stderr]      |                 ^^^^^^^^^^^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: expected values for `feature` are: `unstable`
[INFO] [stderr]      = help: consider adding `bench` as a feature in `Cargo.toml`
[INFO] [stderr]      = note: see <https://doc.rust-lang.org/nightly/cargo/reference/build-scripts.html#rustc-check-cfg> for more information about checking conditional configuration
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stderr]     --> src/skiplist.rs:1156:9
[INFO] [stderr]      |
[INFO] [stderr] 1156 |         try!(write!(f, "["));
[INFO] [stderr]      |         ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stderr]     --> src/skiplist.rs:1162:13
[INFO] [stderr]      |
[INFO] [stderr] 1162 |             try!(write!(f, "{:?}", entry));
[INFO] [stderr]      |             ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stderr]     --> src/skiplist.rs:1160:17
[INFO] [stderr]      |
[INFO] [stderr] 1160 |                 try!(write!(f, ", "));
[INFO] [stderr]      |                 ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stderr]     --> src/skiplist.rs:1171:9
[INFO] [stderr]      |
[INFO] [stderr] 1171 |         try!(write!(f, "["));
[INFO] [stderr]      |         ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stderr]     --> src/skiplist.rs:1177:13
[INFO] [stderr]      |
[INFO] [stderr] 1177 |             try!(write!(f, "{}", entry));
[INFO] [stderr]      |             ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stderr]     --> src/skiplist.rs:1175:17
[INFO] [stderr]      |
[INFO] [stderr] 1175 |                 try!(write!(f, ", "));
[INFO] [stderr]      |                 ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/ordered_skiplist.rs:44:18
[INFO] [stderr]    |
[INFO] [stderr] 44 |     compare: Box<Fn(&T, &T) -> Ordering>,
[INFO] [stderr]    |                  ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stderr]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stderr]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stderr] help: if this is an object-safe trait, use `dyn`
[INFO] [stderr]    |
[INFO] [stderr] 44 |     compare: Box<dyn Fn(&T, &T) -> Ordering>,
[INFO] [stderr]    |                  +++
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/ordered_skiplist.rs:81:24
[INFO] [stderr]    |
[INFO] [stderr] 81 |             })) as Box<Fn(&T, &T) -> Ordering>,
[INFO] [stderr]    |                        ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stderr]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stderr] help: if this is an object-safe trait, use `dyn`
[INFO] [stderr]    |
[INFO] [stderr] 81 |             })) as Box<dyn Fn(&T, &T) -> Ordering>,
[INFO] [stderr]    |                        +++
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/ordered_skiplist.rs:115:24
[INFO] [stderr]     |
[INFO] [stderr] 115 |             })) as Box<Fn(&T, &T) -> Ordering>,
[INFO] [stderr]     |                        ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stderr]     = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stderr] help: if this is an object-safe trait, use `dyn`
[INFO] [stderr]     |
[INFO] [stderr] 115 |             })) as Box<dyn Fn(&T, &T) -> Ordering>,
[INFO] [stderr]     |                        +++
[INFO] [stderr] 
[INFO] [stderr] warning: unused return value of `std::mem::replace` that must be used
[INFO] [stderr]    --> src/ordered_skiplist.rs:236:17
[INFO] [stderr]     |
[INFO] [stderr] 236 |                 mem::replace(&mut (*node).next, mem::replace(&mut next.next, None));
[INFO] [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: if you don't need the old value, you can just assign the new value directly
[INFO] [stderr]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stderr] help: use `let _ = ...` to ignore the resulting value
[INFO] [stderr]     |
[INFO] [stderr] 236 |                 let _ = mem::replace(&mut (*node).next, mem::replace(&mut next.next, None));
[INFO] [stderr]     |                 +++++++
[INFO] [stderr] 
[INFO] [stderr] warning: unused return value of `std::mem::replace` that must be used
[INFO] [stderr]    --> src/ordered_skiplist.rs:241:9
[INFO] [stderr]     |
[INFO] [stderr] 241 |         mem::replace(&mut self.head, new_head);
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: if you don't need the old value, you can just assign the new value directly
[INFO] [stderr] help: use `let _ = ...` to ignore the resulting value
[INFO] [stderr]     |
[INFO] [stderr] 241 |         let _ = mem::replace(&mut self.head, new_head);
[INFO] [stderr]     |         +++++++
[INFO] [stderr] 
[INFO] [stderr] warning: unused return value of `std::mem::replace` that must be used
[INFO] [stderr]    --> src/ordered_skiplist.rs:847:21
[INFO] [stderr]     |
[INFO] [stderr] 847 |                     mem::replace(&mut (*prev).next, mem::replace(&mut (*node).next, None));
[INFO] [stderr]     |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: if you don't need the old value, you can just assign the new value directly
[INFO] [stderr] help: use `let _ = ...` to ignore the resulting value
[INFO] [stderr]     |
[INFO] [stderr] 847 |                     let _ = mem::replace(&mut (*prev).next, mem::replace(&mut (*node).next, None));
[INFO] [stderr]     |                     +++++++
[INFO] [stderr] 
[INFO] [stderr] warning: unused return value of `std::mem::replace` that must be used
[INFO] [stderr]    --> src/ordered_skiplist.rs:922:21
[INFO] [stderr]     |
[INFO] [stderr] 922 |                     mem::replace(&mut (*prev).next, mem::replace(&mut (*node).next, None));
[INFO] [stderr]     |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: if you don't need the old value, you can just assign the new value directly
[INFO] [stderr] help: use `let _ = ...` to ignore the resulting value
[INFO] [stderr]     |
[INFO] [stderr] 922 |                     let _ = mem::replace(&mut (*prev).next, mem::replace(&mut (*node).next, None));
[INFO] [stderr]     |                     +++++++
[INFO] [stderr] 
[INFO] [stderr] warning: unused return value of `std::mem::replace` that must be used
[INFO] [stderr]     --> src/ordered_skiplist.rs:1347:17
[INFO] [stderr]      |
[INFO] [stderr] 1347 |                 mem::replace(&mut (*node).next, mem::replace(&mut next.next, None));
[INFO] [stderr]      |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: if you don't need the old value, you can just assign the new value directly
[INFO] [stderr] help: use `let _ = ...` to ignore the resulting value
[INFO] [stderr]      |
[INFO] [stderr] 1347 |                 let _ = mem::replace(&mut (*node).next, mem::replace(&mut next.next, None));
[INFO] [stderr]      |                 +++++++
[INFO] [stderr] 
[INFO] [stderr] warning: unused return value of `std::mem::replace` that must be used
[INFO] [stderr]    --> src/skipmap.rs:308:17
[INFO] [stderr]     |
[INFO] [stderr] 308 |                 mem::replace(&mut (*node).next, mem::replace(&mut next.next, None));
[INFO] [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: if you don't need the old value, you can just assign the new value directly
[INFO] [stderr] help: use `let _ = ...` to ignore the resulting value
[INFO] [stderr]     |
[INFO] [stderr] 308 |                 let _ = mem::replace(&mut (*node).next, mem::replace(&mut next.next, None));
[INFO] [stderr]     |                 +++++++
[INFO] [stderr] 
[INFO] [stderr] warning: unused return value of `std::mem::replace` that must be used
[INFO] [stderr]    --> src/skipmap.rs:313:9
[INFO] [stderr]     |
[INFO] [stderr] 313 |         mem::replace(&mut self.head, new_head);
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: if you don't need the old value, you can just assign the new value directly
[INFO] [stderr] help: use `let _ = ...` to ignore the resulting value
[INFO] [stderr]     |
[INFO] [stderr] 313 |         let _ = mem::replace(&mut self.head, new_head);
[INFO] [stderr]     |         +++++++
[INFO] [stderr] 
[INFO] [stderr] warning: unused return value of `std::mem::replace` that must be used
[INFO] [stderr]     --> src/skipmap.rs:1255:17
[INFO] [stderr]      |
[INFO] [stderr] 1255 |                 mem::replace(&mut (*node).next, mem::replace(&mut next.next, None));
[INFO] [stderr]      |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: if you don't need the old value, you can just assign the new value directly
[INFO] [stderr] help: use `let _ = ...` to ignore the resulting value
[INFO] [stderr]      |
[INFO] [stderr] 1255 |                 let _ = mem::replace(&mut (*node).next, mem::replace(&mut next.next, None));
[INFO] [stderr]      |                 +++++++
[INFO] [stderr] 
[INFO] [stderr] warning: unused return value of `std::mem::replace` that must be used
[INFO] [stderr]   --> src/skiplist.rs:94:17
[INFO] [stderr]    |
[INFO] [stderr] 94 |                 mem::replace(&mut (*node).next, mem::replace(&mut next.next, None));
[INFO] [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: if you don't need the old value, you can just assign the new value directly
[INFO] [stderr] help: use `let _ = ...` to ignore the resulting value
[INFO] [stderr]    |
[INFO] [stderr] 94 |                 let _ = mem::replace(&mut (*node).next, mem::replace(&mut next.next, None));
[INFO] [stderr]    |                 +++++++
[INFO] [stderr] 
[INFO] [stderr] warning: unused return value of `std::mem::replace` that must be used
[INFO] [stderr]   --> src/skiplist.rs:99:9
[INFO] [stderr]    |
[INFO] [stderr] 99 |         mem::replace(&mut self.head, new_head);
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: if you don't need the old value, you can just assign the new value directly
[INFO] [stderr] help: use `let _ = ...` to ignore the resulting value
[INFO] [stderr]    |
[INFO] [stderr] 99 |         let _ = mem::replace(&mut self.head, new_head);
[INFO] [stderr]    |         +++++++
[INFO] [stderr] 
[INFO] [stderr] warning: unused return value of `std::mem::replace` that must be used
[INFO] [stderr]    --> src/skiplist.rs:567:21
[INFO] [stderr]     |
[INFO] [stderr] 567 |                     mem::replace(&mut (*prev).next, mem::replace(&mut (*node).next, None));
[INFO] [stderr]     |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: if you don't need the old value, you can just assign the new value directly
[INFO] [stderr] help: use `let _ = ...` to ignore the resulting value
[INFO] [stderr]     |
[INFO] [stderr] 567 |                     let _ = mem::replace(&mut (*prev).next, mem::replace(&mut (*node).next, None));
[INFO] [stderr]     |                     +++++++
[INFO] [stderr] 
[INFO] [stderr] warning: unused return value of `std::mem::replace` that must be used
[INFO] [stderr]    --> src/skiplist.rs:863:21
[INFO] [stderr]     |
[INFO] [stderr] 863 |                     mem::replace(&mut (*prev).next, mem::replace(&mut (*node).next, None));
[INFO] [stderr]     |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: if you don't need the old value, you can just assign the new value directly
[INFO] [stderr] help: use `let _ = ...` to ignore the resulting value
[INFO] [stderr]     |
[INFO] [stderr] 863 |                     let _ = mem::replace(&mut (*prev).next, mem::replace(&mut (*node).next, None));
[INFO] [stderr]     |                     +++++++
[INFO] [stderr] 
[INFO] [stderr] warning: unused return value of `std::mem::replace` that must be used
[INFO] [stderr]     --> src/skiplist.rs:1088:17
[INFO] [stderr]      |
[INFO] [stderr] 1088 |                 mem::replace(&mut (*node).next, mem::replace(&mut next.next, None));
[INFO] [stderr]      |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: if you don't need the old value, you can just assign the new value directly
[INFO] [stderr] help: use `let _ = ...` to ignore the resulting value
[INFO] [stderr]      |
[INFO] [stderr] 1088 |                 let _ = mem::replace(&mut (*node).next, mem::replace(&mut next.next, None));
[INFO] [stderr]      |                 +++++++
[INFO] [stderr] 
[INFO] [stderr] warning: `stable-skiplist` (lib) generated 37 warnings (run `cargo fix --lib -p stable-skiplist` to apply 3 suggestions)
[INFO] [stderr] warning: `stable-skiplist` (lib test) generated 37 warnings (37 duplicates)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.02s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/stable_skiplist-b287c5fe762ca00e)
[INFO] [stdout] 
[INFO] [stdout] running 36 tests
[INFO] [stdout] test ordered_skiplist::tests::basic_small ... ok
[INFO] [stdout] test ordered_skiplist::tests::index ... ok
[INFO] [stdout] test ordered_skiplist::tests::range_1000 ... ok
[INFO] [stdout] test ordered_skiplist::tests::range_small ... ok
[INFO] [stdout] test ordered_skiplist::tests::iter_mixed ... ok
[INFO] [stdout] test ordered_skiplist::tests::remove_index ... ok
[INFO] [stdout] test ordered_skiplist::tests::iter_rev ... ok
[INFO] [stdout] test ordered_skiplist::tests::retain ... ok
[INFO] [stdout] test ordered_skiplist::tests::iter ... ok
[INFO] [stdout] test skiplist::tests::basic_small ... ok
[INFO] [stdout] test skiplist::tests::index ... ok
[INFO] [stdout] test ordered_skiplist::tests::basic_large ... ok
[INFO] [stdout] test skiplist::tests::iter ... ok
[INFO] [stdout] test skiplist::tests::iter_rev ... ok
[INFO] [stdout] test ordered_skiplist::tests::pop ... ok
[INFO] [stdout] test skiplist::tests::range_1000 ... ok
[INFO] [stdout] test skiplist::tests::range_small ... ok
[INFO] [stdout] test skiplist::tests::retain ... ok
[INFO] [stdout] test skiplist::tests::iter_mixed ... ok
[INFO] [stdout] test skipmap::tests::basic_small ... ok
[INFO] [stdout] test skipmap::tests::index ... ok
[INFO] [stdout] test skiplist::tests::pop ... ok
[INFO] [stdout] test skipmap::tests::iter_mixed ... ok
[INFO] [stdout] test skipmap::tests::basic_large ... ok
[INFO] [stdout] test skipmap::tests::iter_rev ... ok
[INFO] [stdout] test skipmap::tests::iter ... ok
[INFO] [stdout] test skipmap::tests::range_1000 ... ok
[INFO] [stdout] test skipmap::tests::range_small ... ok
[INFO] [stdout] test skipmap::tests::pop ... ok
[INFO] [stdout] test skipmap::tests::remove_index ... ok
[INFO] [stdout] test ordered_skiplist::tests::range ... ok
[INFO] [stdout] test skipmap::tests::range ... ok
[INFO] [stdout] test skiplist::tests::range ... ok
[INFO] [stdout] test skiplist::tests::dedup ... ok
[INFO] [stdout] test skiplist::tests::basic_large ... ok
[INFO] [stdout] test ordered_skiplist::tests::dedup ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 36 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 1.16s
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests stable_skiplist
[INFO] [stdout] 
[INFO] [stdout] running 69 tests
[INFO] [stdout] test src/ordered_skiplist.rs - ordered_skiplist::OrderedSkipList<T>::get (line 415) ... FAILED
[INFO] [stdout] test src/ordered_skiplist.rs - ordered_skiplist::OrderedSkipList<T>::dedup (line 857) ... FAILED
[INFO] [stdout] test src/ordered_skiplist.rs - ordered_skiplist::OrderedSkipList<T>::back (line 390) ... FAILED
[INFO] [stdout] test src/ordered_skiplist.rs - ordered_skiplist::OrderedSkipList<T>::insert (line 282) ... FAILED
[INFO] [stdout] test src/ordered_skiplist.rs - ordered_skiplist::OrderedSkipList<T>::clear (line 222) ... FAILED
[INFO] [stdout] test src/ordered_skiplist.rs - ordered_skiplist::OrderedSkipList<T>::front (line 367) ... FAILED
[INFO] [stdout] test src/ordered_skiplist.rs - ordered_skiplist::OrderedSkipList<T>::contains (line 487) ... FAILED
[INFO] [stdout] test src/ordered_skiplist.rs - ordered_skiplist::OrderedSkipList<T>::into_iter (line 932) ... FAILED
[INFO] [stdout] test src/ordered_skiplist.rs - ordered_skiplist::OrderedSkipList<T>::new (line 67) ... FAILED
[INFO] [stdout] test src/ordered_skiplist.rs - ordered_skiplist::OrderedSkipList<T>::is_empty (line 264) ... FAILED
[INFO] [stdout] test src/ordered_skiplist.rs - ordered_skiplist::OrderedSkipList<T>::pop_back (line 462) ... FAILED
[INFO] [stdout] test src/ordered_skiplist.rs - ordered_skiplist::OrderedSkipList<T>::len (line 248) ... FAILED
[INFO] [stdout] test src/ordered_skiplist.rs - ordered_skiplist::OrderedSkipList<T>::iter (line 954) ... FAILED
[INFO] [stdout] test src/ordered_skiplist.rs - ordered_skiplist::OrderedSkipList<T>::pop_front (line 438) ... FAILED
[INFO] [stdout] test src/ordered_skiplist.rs - ordered_skiplist::OrderedSkipList<T>::range (line 979) ... FAILED
[INFO] [stdout] test src/ordered_skiplist.rs - ordered_skiplist::OrderedSkipList<T>::remove (line 534) ... FAILED
[INFO] [stdout] test src/ordered_skiplist.rs - ordered_skiplist::OrderedSkipList<T>::remove_first (line 633) ... FAILED
[INFO] [stdout] test src/ordered_skiplist.rs - ordered_skiplist::OrderedSkipList<T>::retain (line 795) ... FAILED
[INFO] [stdout] test src/ordered_skiplist.rs - ordered_skiplist::OrderedSkipList<T>::with_comp (line 139) ... FAILED
[INFO] [stdout] test src/skiplist.rs - skiplist::SkipList<T>::back_mut (line 335) ... FAILED
[INFO] [stdout] test src/ordered_skiplist.rs - ordered_skiplist::OrderedSkipList<T>::remove_index (line 740) ... FAILED
[INFO] [stdout] test src/skiplist.rs - skiplist::SkipList<T>::back (line 311) ... FAILED
[INFO] [stdout] test src/skiplist.rs - skiplist::SkipList<T>::contains (line 772) ... FAILED
[INFO] [stdout] test src/ordered_skiplist.rs - ordered_skiplist::OrderedSkipList<T>::with_capacity (line 99) ... FAILED
[INFO] [stdout] test src/skiplist.rs - skiplist::SkipList<T>::clear (line 80) ... FAILED
[INFO] [stdout] test src/skiplist.rs - skiplist::SkipList<T>::front (line 265) ... FAILED
[INFO] [stdout] test src/skiplist.rs - skiplist::SkipList<T>::front_mut (line 288) ... FAILED
[INFO] [stdout] test src/skiplist.rs - skiplist::SkipList<T>::dedup (line 796) ... FAILED
[INFO] [stdout] test src/skiplist.rs - skiplist::SkipList<T>::get_mut (line 384) ... FAILED
[INFO] [stdout] test src/skiplist.rs - skiplist::SkipList<T>::into_iter (line 577) ... FAILED
[INFO] [stdout] test src/skiplist.rs - skiplist::SkipList<T>::get (line 360) ... FAILED
[INFO] [stdout] test src/skiplist.rs - skiplist::SkipList<T>::insert (line 144) ... FAILED
[INFO] [stdout] test src/skiplist.rs - skiplist::SkipList<T>::is_empty (line 122) ... FAILED
[INFO] [stdout] test src/skiplist.rs - skiplist::SkipList<T>::iter_mut (line 621) ... FAILED
[INFO] [stdout] test src/skiplist.rs - skiplist::SkipList<T>::iter (line 599) ... FAILED
[INFO] [stdout] test src/skiplist.rs - skiplist::SkipList<T>::len (line 106) ... FAILED
[INFO] [stdout] test src/skiplist.rs - skiplist::SkipList<T>::push_front (line 233) ... FAILED
[INFO] [stdout] test src/skiplist.rs - skiplist::SkipList<T>::new (line 38) ... FAILED
[INFO] [stdout] test src/skiplist.rs - skiplist::SkipList<T>::pop_back (line 431) ... FAILED
[INFO] [stdout] test src/skiplist.rs - skiplist::SkipList<T>::push_back (line 248) ... FAILED
[INFO] [stdout] test src/skiplist.rs - skiplist::SkipList<T>::pop_front (line 407) ... FAILED
[INFO] [stdout] test src/skiplist.rs - skiplist::SkipList<T>::range (line 646) ... FAILED
[INFO] [stdout] test src/skiplist.rs - skiplist::SkipList<T>::remove (line 460) ... FAILED
[INFO] [stdout] test src/skiplist.rs - skiplist::SkipList<T>::with_capacity (line 59) ... FAILED
[INFO] [stdout] test src/skipmap.rs - skipmap::SkipMap<K,V>::back (line 410) ... FAILED
[INFO] [stdout] test src/skiplist.rs - skiplist::SkipList<T>::range_mut (line 709) ... FAILED
[INFO] [stdout] test src/skipmap.rs - skipmap::SkipMap<K,V>::clear (line 294) ... FAILED
[INFO] [stdout] test src/skiplist.rs - skiplist::SkipList<T>::retain (line 515) ... FAILED
[INFO] [stdout] test src/skipmap.rs - skipmap::SkipMap<K,V>::front (line 354) ... FAILED
[INFO] [stdout] test src/skipmap.rs - skipmap::SkipMap<K,V>::back_mut (line 440) ... FAILED
[INFO] [stdout] test src/skipmap.rs - skipmap::SkipMap<K,V>::contains_key (line 609) ... FAILED
[INFO] [stdout] test src/skipmap.rs - skipmap::SkipMap<K,V>::front_mut (line 383) ... FAILED
[INFO] [stdout] test src/skipmap.rs - skipmap::SkipMap<K,V>::insert (line 181) ... FAILED
[INFO] [stdout] test src/skipmap.rs - skipmap::SkipMap<K,V>::into_iter (line 809) ... FAILED
[INFO] [stdout] test src/skipmap.rs - skipmap::SkipMap<K,V>::get_mut (line 513) ... FAILED
[INFO] [stdout] test src/skipmap.rs - skipmap::SkipMap<K,V>::is_empty (line 336) ... FAILED
[INFO] [stdout] test src/skipmap.rs - skipmap::SkipMap<K,V>::iter_mut (line 856) ... FAILED
[INFO] [stdout] test src/skipmap.rs - skipmap::SkipMap<K,V>::get (line 469) ... FAILED
[INFO] [stdout] test src/skipmap.rs - skipmap::SkipMap<K,V>::iter (line 831) ... FAILED
[INFO] [stdout] test src/skipmap.rs - skipmap::SkipMap<K,V>::remove_index (line 757) ... FAILED
[INFO] [stdout] test src/skipmap.rs - skipmap::SkipMap<K,V>::len (line 320) ... FAILED
[INFO] [stdout] test src/skipmap.rs - skipmap::SkipMap<K,V>::pop_back (line 584) ... FAILED
[INFO] [stdout] test src/skipmap.rs - skipmap::SkipMap<K,V>::new (line 139) ... FAILED
[INFO] [stdout] test src/skipmap.rs - skipmap::SkipMap<K,V>::keys (line 879) ... FAILED
[INFO] [stdout] test src/skipmap.rs - skipmap::SkipMap<K,V>::range (line 926) ... FAILED
[INFO] [stdout] test src/skipmap.rs - skipmap::SkipMap<K,V>::remove (line 654) ... FAILED
[INFO] [stdout] test src/skipmap.rs - skipmap::SkipMap<K,V>::pop_front (line 560) ... FAILED
[INFO] [stdout] test src/skipmap.rs - skipmap::SkipMap<K,V>::values (line 901) ... FAILED
[INFO] [stdout] test src/skipmap.rs - skipmap::SkipMap<K,V>::with_capacity (line 160) ... FAILED
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout] 
[INFO] [stdout] ---- src/ordered_skiplist.rs - ordered_skiplist::OrderedSkipList<T>::get (line 415) stdout ----
[INFO] [stdout] error[E0432]: unresolved import `skiplist`
[INFO] [stdout]  --> src/ordered_skiplist.rs:416:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use skiplist::OrderedSkipList;
[INFO] [stdout]   |     ^^^^^^^^ maybe a missing crate `skiplist`?
[INFO] [stdout]   |
[INFO] [stdout]   = help: consider adding `extern crate skiplist` to use the `skiplist` crate
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 1 previous error
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0432`.
[INFO] [stdout] Couldn't compile the test.
[INFO] [stdout] ---- src/ordered_skiplist.rs - ordered_skiplist::OrderedSkipList<T>::dedup (line 857) stdout ----
[INFO] [stdout] error[E0432]: unresolved import `skiplist`
[INFO] [stdout]  --> src/ordered_skiplist.rs:858:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use skiplist::OrderedSkipList;
[INFO] [stdout]   |     ^^^^^^^^ maybe a missing crate `skiplist`?
[INFO] [stdout]   |
[INFO] [stdout]   = help: consider adding `extern crate skiplist` to use the `skiplist` crate
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 1 previous error
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0432`.
[INFO] [stdout] Couldn't compile the test.
[INFO] [stdout] ---- src/ordered_skiplist.rs - ordered_skiplist::OrderedSkipList<T>::back (line 390) stdout ----
[INFO] [stdout] error[E0432]: unresolved import `skiplist`
[INFO] [stdout]  --> src/ordered_skiplist.rs:391:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use skiplist::OrderedSkipList;
[INFO] [stdout]   |     ^^^^^^^^ maybe a missing crate `skiplist`?
[INFO] [stdout]   |
[INFO] [stdout]   = help: consider adding `extern crate skiplist` to use the `skiplist` crate
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 1 previous error
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0432`.
[INFO] [stdout] Couldn't compile the test.
[INFO] [stdout] ---- src/ordered_skiplist.rs - ordered_skiplist::OrderedSkipList<T>::insert (line 282) stdout ----
[INFO] [stdout] error[E0432]: unresolved import `skiplist`
[INFO] [stdout]  --> src/ordered_skiplist.rs:283:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use skiplist::OrderedSkipList;
[INFO] [stdout]   |     ^^^^^^^^ maybe a missing crate `skiplist`?
[INFO] [stdout]   |
[INFO] [stdout]   = help: consider adding `extern crate skiplist` to use the `skiplist` crate
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 1 previous error
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0432`.
[INFO] [stdout] Couldn't compile the test.
[INFO] [stdout] ---- src/ordered_skiplist.rs - ordered_skiplist::OrderedSkipList<T>::clear (line 222) stdout ----
[INFO] [stdout] error[E0432]: unresolved import `skiplist`
[INFO] [stdout]  --> src/ordered_skiplist.rs:223:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use skiplist::OrderedSkipList;
[INFO] [stdout]   |     ^^^^^^^^ maybe a missing crate `skiplist`?
[INFO] [stdout]   |
[INFO] [stdout]   = help: consider adding `extern crate skiplist` to use the `skiplist` crate
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 1 previous error
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0432`.
[INFO] [stdout] Couldn't compile the test.
[INFO] [stdout] ---- src/ordered_skiplist.rs - ordered_skiplist::OrderedSkipList<T>::front (line 367) stdout ----
[INFO] [stdout] error[E0432]: unresolved import `skiplist`
[INFO] [stdout]  --> src/ordered_skiplist.rs:368:5
[INFO] [stdout]   |
[INFO] [stderr] error: doctest failed, to rerun pass `--doc`
[INFO] [stdout] 3 | use skiplist::OrderedSkipList;
[INFO] [stdout]   |     ^^^^^^^^ maybe a missing crate `skiplist`?
[INFO] [stdout]   |
[INFO] [stdout]   = help: consider adding `extern crate skiplist` to use the `skiplist` crate
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 1 previous error
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0432`.
[INFO] [stdout] Couldn't compile the test.
[INFO] [stdout] ---- src/ordered_skiplist.rs - ordered_skiplist::OrderedSkipList<T>::contains (line 487) stdout ----
[INFO] [stdout] error[E0432]: unresolved import `skiplist`
[INFO] [stdout]  --> src/ordered_skiplist.rs:488:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use skiplist::OrderedSkipList;
[INFO] [stdout]   |     ^^^^^^^^ maybe a missing crate `skiplist`?
[INFO] [stdout]   |
[INFO] [stdout]   = help: consider adding `extern crate skiplist` to use the `skiplist` crate
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 1 previous error
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0432`.
[INFO] [stdout] Couldn't compile the test.
[INFO] [stdout] ---- src/ordered_skiplist.rs - ordered_skiplist::OrderedSkipList<T>::into_iter (line 932) stdout ----
[INFO] [stdout] error[E0432]: unresolved import `skiplist`
[INFO] [stdout]  --> src/ordered_skiplist.rs:933:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use skiplist::OrderedSkipList;
[INFO] [stdout]   |     ^^^^^^^^ maybe a missing crate `skiplist`?
[INFO] [stdout]   |
[INFO] [stdout]   = help: consider adding `extern crate skiplist` to use the `skiplist` crate
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 1 previous error
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0432`.
[INFO] [stdout] Couldn't compile the test.
[INFO] [stdout] ---- src/ordered_skiplist.rs - ordered_skiplist::OrderedSkipList<T>::new (line 67) stdout ----
[INFO] [stdout] error[E0432]: unresolved import `skiplist`
[INFO] [stdout]  --> src/ordered_skiplist.rs:68:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use skiplist::OrderedSkipList;
[INFO] [stdout]   |     ^^^^^^^^ maybe a missing crate `skiplist`?
[INFO] [stdout]   |
[INFO] [stdout]   = help: consider adding `extern crate skiplist` to use the `skiplist` crate
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 1 previous error
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0432`.
[INFO] [stdout] Couldn't compile the test.
[INFO] [stdout] ---- src/ordered_skiplist.rs - ordered_skiplist::OrderedSkipList<T>::is_empty (line 264) stdout ----
[INFO] [stdout] error[E0432]: unresolved import `skiplist`
[INFO] [stdout]  --> src/ordered_skiplist.rs:265:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use skiplist::OrderedSkipList;
[INFO] [stdout]   |     ^^^^^^^^ maybe a missing crate `skiplist`?
[INFO] [stdout]   |
[INFO] [stdout]   = help: consider adding `extern crate skiplist` to use the `skiplist` crate
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 1 previous error
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0432`.
[INFO] [stdout] Couldn't compile the test.
[INFO] [stdout] ---- src/ordered_skiplist.rs - ordered_skiplist::OrderedSkipList<T>::pop_back (line 462) stdout ----
[INFO] [stdout] error[E0432]: unresolved import `skiplist`
[INFO] [stdout]  --> src/ordered_skiplist.rs:463:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use skiplist::OrderedSkipList;
[INFO] [stdout]   |     ^^^^^^^^ maybe a missing crate `skiplist`?
[INFO] [stdout]   |
[INFO] [stdout]   = help: consider adding `extern crate skiplist` to use the `skiplist` crate
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 1 previous error
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0432`.
[INFO] [stdout] Couldn't compile the test.
[INFO] [stdout] ---- src/ordered_skiplist.rs - ordered_skiplist::OrderedSkipList<T>::len (line 248) stdout ----
[INFO] [stdout] error[E0432]: unresolved import `skiplist`
[INFO] [stdout]  --> src/ordered_skiplist.rs:249:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use skiplist::OrderedSkipList;
[INFO] [stdout]   |     ^^^^^^^^ maybe a missing crate `skiplist`?
[INFO] [stdout]   |
[INFO] [stdout]   = help: consider adding `extern crate skiplist` to use the `skiplist` crate
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 1 previous error
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0432`.
[INFO] [stdout] Couldn't compile the test.
[INFO] [stdout] ---- src/ordered_skiplist.rs - ordered_skiplist::OrderedSkipList<T>::iter (line 954) stdout ----
[INFO] [stdout] error[E0432]: unresolved import `skiplist`
[INFO] [stdout]  --> src/ordered_skiplist.rs:955:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use skiplist::OrderedSkipList;
[INFO] [stdout]   |     ^^^^^^^^ maybe a missing crate `skiplist`?
[INFO] [stdout]   |
[INFO] [stdout]   = help: consider adding `extern crate skiplist` to use the `skiplist` crate
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 1 previous error
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0432`.
[INFO] [stdout] Couldn't compile the test.
[INFO] [stdout] ---- src/ordered_skiplist.rs - ordered_skiplist::OrderedSkipList<T>::pop_front (line 438) stdout ----
[INFO] [stdout] error[E0432]: unresolved import `skiplist`
[INFO] [stdout]  --> src/ordered_skiplist.rs:439:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use skiplist::OrderedSkipList;
[INFO] [stdout]   |     ^^^^^^^^ maybe a missing crate `skiplist`?
[INFO] [stdout]   |
[INFO] [stdout]   = help: consider adding `extern crate skiplist` to use the `skiplist` crate
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 1 previous error
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0432`.
[INFO] [stdout] Couldn't compile the test.
[INFO] [stdout] ---- src/ordered_skiplist.rs - ordered_skiplist::OrderedSkipList<T>::range (line 979) stdout ----
[INFO] [stdout] error[E0433]: failed to resolve: maybe a missing crate `skiplist`?
[INFO] [stdout]  --> src/ordered_skiplist.rs:981:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | use skiplist::Bound::{Included, Unbounded};
[INFO] [stdout]   |     ^^^^^^^^ maybe a missing crate `skiplist`?
[INFO] [stdout]   |
[INFO] [stdout]   = help: consider adding `extern crate skiplist` to use the `skiplist` crate
[INFO] [stdout] 
[INFO] [stdout] error[E0432]: unresolved import `skiplist`
[INFO] [stdout]  --> src/ordered_skiplist.rs:980:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use skiplist::OrderedSkipList;
[INFO] [stdout]   |     ^^^^^^^^ maybe a missing crate `skiplist`?
[INFO] [stdout]   |
[INFO] [stdout]   = help: consider adding `extern crate skiplist` to use the `skiplist` crate
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 previous errors
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0432, E0433.
[INFO] [stdout] For more information about an error, try `rustc --explain E0432`.
[INFO] [stdout] Couldn't compile the test.
[INFO] [stdout] ---- src/ordered_skiplist.rs - ordered_skiplist::OrderedSkipList<T>::remove (line 534) stdout ----
[INFO] [stdout] error[E0432]: unresolved import `skiplist`
[INFO] [stdout]  --> src/ordered_skiplist.rs:535:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use skiplist::OrderedSkipList;
[INFO] [stdout]   |     ^^^^^^^^ maybe a missing crate `skiplist`?
[INFO] [stdout]   |
[INFO] [stdout]   = help: consider adding `extern crate skiplist` to use the `skiplist` crate
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 1 previous error
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0432`.
[INFO] [stdout] Couldn't compile the test.
[INFO] [stdout] ---- src/ordered_skiplist.rs - ordered_skiplist::OrderedSkipList<T>::remove_first (line 633) stdout ----
[INFO] [stdout] error[E0432]: unresolved import `skiplist`
[INFO] [stdout]  --> src/ordered_skiplist.rs:634:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use skiplist::OrderedSkipList;
[INFO] [stdout]   |     ^^^^^^^^ maybe a missing crate `skiplist`?
[INFO] [stdout]   |
[INFO] [stdout]   = help: consider adding `extern crate skiplist` to use the `skiplist` crate
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 1 previous error
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0432`.
[INFO] [stdout] Couldn't compile the test.
[INFO] [stdout] ---- src/ordered_skiplist.rs - ordered_skiplist::OrderedSkipList<T>::retain (line 795) stdout ----
[INFO] [stdout] error[E0432]: unresolved import `skiplist`
[INFO] [stdout]  --> src/ordered_skiplist.rs:796:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use skiplist::OrderedSkipList;
[INFO] [stdout]   |     ^^^^^^^^ maybe a missing crate `skiplist`?
[INFO] [stdout]   |
[INFO] [stdout]   = help: consider adding `extern crate skiplist` to use the `skiplist` crate
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 1 previous error
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0432`.
[INFO] [stdout] Couldn't compile the test.
[INFO] [stdout] ---- src/ordered_skiplist.rs - ordered_skiplist::OrderedSkipList<T>::with_comp (line 139) stdout ----
[INFO] [stdout] error[E0432]: unresolved import `skiplist`
[INFO] [stdout]  --> src/ordered_skiplist.rs:140:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use skiplist::OrderedSkipList;
[INFO] [stdout]   |     ^^^^^^^^ maybe a missing crate `skiplist`?
[INFO] [stdout]   |
[INFO] [stdout]   = help: consider adding `extern crate skiplist` to use the `skiplist` crate
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 1 previous error
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0432`.
[INFO] [stdout] Couldn't compile the test.
[INFO] [stdout] ---- src/skiplist.rs - skiplist::SkipList<T>::back_mut (line 335) stdout ----
[INFO] [stdout] error[E0432]: unresolved import `skiplist`
[INFO] [stdout]  --> src/skiplist.rs:336:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use skiplist::SkipList;
[INFO] [stdout]   |     ^^^^^^^^ maybe a missing crate `skiplist`?
[INFO] [stdout]   |
[INFO] [stdout]   = help: consider adding `extern crate skiplist` to use the `skiplist` crate
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 1 previous error
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0432`.
[INFO] [stdout] Couldn't compile the test.
[INFO] [stdout] ---- src/ordered_skiplist.rs - ordered_skiplist::OrderedSkipList<T>::remove_index (line 740) stdout ----
[INFO] [stdout] error[E0432]: unresolved import `skiplist`
[INFO] [stdout]  --> src/ordered_skiplist.rs:741:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use skiplist::OrderedSkipList;
[INFO] [stdout]   |     ^^^^^^^^ maybe a missing crate `skiplist`?
[INFO] [stdout]   |
[INFO] [stdout]   = help: consider adding `extern crate skiplist` to use the `skiplist` crate
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 1 previous error
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0432`.
[INFO] [stdout] Couldn't compile the test.
[INFO] [stdout] ---- src/skiplist.rs - skiplist::SkipList<T>::back (line 311) stdout ----
[INFO] [stdout] error[E0432]: unresolved import `skiplist`
[INFO] [stdout]  --> src/skiplist.rs:312:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use skiplist::SkipList;
[INFO] [stdout]   |     ^^^^^^^^ maybe a missing crate `skiplist`?
[INFO] [stdout]   |
[INFO] [stdout]   = help: consider adding `extern crate skiplist` to use the `skiplist` crate
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 1 previous error
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0432`.
[INFO] [stdout] Couldn't compile the test.
[INFO] [stdout] ---- src/skiplist.rs - skiplist::SkipList<T>::contains (line 772) stdout ----
[INFO] [stdout] error[E0432]: unresolved import `skiplist`
[INFO] [stdout]  --> src/skiplist.rs:773:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use skiplist::SkipList;
[INFO] [stdout]   |     ^^^^^^^^ maybe a missing crate `skiplist`?
[INFO] [stdout]   |
[INFO] [stdout]   = help: consider adding `extern crate skiplist` to use the `skiplist` crate
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 1 previous error
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0432`.
[INFO] [stdout] Couldn't compile the test.
[INFO] [stdout] ---- src/ordered_skiplist.rs - ordered_skiplist::OrderedSkipList<T>::with_capacity (line 99) stdout ----
[INFO] [stdout] error[E0432]: unresolved import `skiplist`
[INFO] [stdout]  --> src/ordered_skiplist.rs:100:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use skiplist::OrderedSkipList;
[INFO] [stdout]   |     ^^^^^^^^ maybe a missing crate `skiplist`?
[INFO] [stdout]   |
[INFO] [stdout]   = help: consider adding `extern crate skiplist` to use the `skiplist` crate
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 1 previous error
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0432`.
[INFO] [stdout] Couldn't compile the test.
[INFO] [stdout] ---- src/skiplist.rs - skiplist::SkipList<T>::clear (line 80) stdout ----
[INFO] [stdout] error[E0432]: unresolved import `skiplist`
[INFO] [stdout]  --> src/skiplist.rs:81:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use skiplist::SkipList;
[INFO] [stdout]   |     ^^^^^^^^ maybe a missing crate `skiplist`?
[INFO] [stdout]   |
[INFO] [stdout]   = help: consider adding `extern crate skiplist` to use the `skiplist` crate
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 1 previous error
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0432`.
[INFO] [stdout] Couldn't compile the test.
[INFO] [stdout] ---- src/skiplist.rs - skiplist::SkipList<T>::front (line 265) stdout ----
[INFO] [stdout] error[E0432]: unresolved import `skiplist`
[INFO] [stdout]  --> src/skiplist.rs:266:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use skiplist::SkipList;
[INFO] [stdout]   |     ^^^^^^^^ maybe a missing crate `skiplist`?
[INFO] [stdout]   |
[INFO] [stdout]   = help: consider adding `extern crate skiplist` to use the `skiplist` crate
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 1 previous error
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0432`.
[INFO] [stdout] Couldn't compile the test.
[INFO] [stdout] ---- src/skiplist.rs - skiplist::SkipList<T>::front_mut (line 288) stdout ----
[INFO] [stdout] error[E0432]: unresolved import `skiplist`
[INFO] [stdout]  --> src/skiplist.rs:289:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use skiplist::SkipList;
[INFO] [stdout]   |     ^^^^^^^^ maybe a missing crate `skiplist`?
[INFO] [stdout]   |
[INFO] [stdout]   = help: consider adding `extern crate skiplist` to use the `skiplist` crate
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 1 previous error
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0432`.
[INFO] [stdout] Couldn't compile the test.
[INFO] [stdout] ---- src/skiplist.rs - skiplist::SkipList<T>::dedup (line 796) stdout ----
[INFO] [stdout] error[E0432]: unresolved import `skiplist`
[INFO] [stdout]  --> src/skiplist.rs:797:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use skiplist::SkipList;
[INFO] [stdout]   |     ^^^^^^^^ maybe a missing crate `skiplist`?
[INFO] [stdout]   |
[INFO] [stdout]   = help: consider adding `extern crate skiplist` to use the `skiplist` crate
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 1 previous error
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0432`.
[INFO] [stdout] Couldn't compile the test.
[INFO] [stdout] ---- src/skiplist.rs - skiplist::SkipList<T>::get_mut (line 384) stdout ----
[INFO] [stdout] error[E0432]: unresolved import `skiplist`
[INFO] [stdout]  --> src/skiplist.rs:385:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use skiplist::SkipList;
[INFO] [stdout]   |     ^^^^^^^^ maybe a missing crate `skiplist`?
[INFO] [stdout]   |
[INFO] [stdout]   = help: consider adding `extern crate skiplist` to use the `skiplist` crate
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 1 previous error
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0432`.
[INFO] [stdout] Couldn't compile the test.
[INFO] [stdout] ---- src/skiplist.rs - skiplist::SkipList<T>::into_iter (line 577) stdout ----
[INFO] [stdout] error[E0432]: unresolved import `skiplist`
[INFO] [stdout]  --> src/skiplist.rs:578:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use skiplist::SkipList;
[INFO] [stdout]   |     ^^^^^^^^ maybe a missing crate `skiplist`?
[INFO] [stdout]   |
[INFO] [stdout]   = help: consider adding `extern crate skiplist` to use the `skiplist` crate
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 1 previous error
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0432`.
[INFO] [stdout] Couldn't compile the test.
[INFO] [stdout] ---- src/skiplist.rs - skiplist::SkipList<T>::get (line 360) stdout ----
[INFO] [stdout] error[E0432]: unresolved import `skiplist`
[INFO] [stdout]  --> src/skiplist.rs:361:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use skiplist::SkipList;
[INFO] [stdout]   |     ^^^^^^^^ maybe a missing crate `skiplist`?
[INFO] [stdout]   |
[INFO] [stdout]   = help: consider adding `extern crate skiplist` to use the `skiplist` crate
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 1 previous error
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0432`.
[INFO] [stdout] Couldn't compile the test.
[INFO] [stdout] ---- src/skiplist.rs - skiplist::SkipList<T>::insert (line 144) stdout ----
[INFO] [stdout] error[E0432]: unresolved import `skiplist`
[INFO] [stdout]  --> src/skiplist.rs:145:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use skiplist::SkipList;
[INFO] [stdout]   |     ^^^^^^^^ maybe a missing crate `skiplist`?
[INFO] [stdout]   |
[INFO] [stdout]   = help: consider adding `extern crate skiplist` to use the `skiplist` crate
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 1 previous error
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0432`.
[INFO] [stdout] Couldn't compile the test.
[INFO] [stdout] ---- src/skiplist.rs - skiplist::SkipList<T>::is_empty (line 122) stdout ----
[INFO] [stdout] error[E0432]: unresolved import `skiplist`
[INFO] [stdout]  --> src/skiplist.rs:123:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use skiplist::SkipList;
[INFO] [stdout]   |     ^^^^^^^^ maybe a missing crate `skiplist`?
[INFO] [stdout]   |
[INFO] [stdout]   = help: consider adding `extern crate skiplist` to use the `skiplist` crate
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 1 previous error
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0432`.
[INFO] [stdout] Couldn't compile the test.
[INFO] [stdout] ---- src/skiplist.rs - skiplist::SkipList<T>::iter_mut (line 621) stdout ----
[INFO] [stdout] error[E0432]: unresolved import `skiplist`
[INFO] [stdout]  --> src/skiplist.rs:622:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use skiplist::SkipList;
[INFO] [stdout]   |     ^^^^^^^^ maybe a missing crate `skiplist`?
[INFO] [stdout]   |
[INFO] [stdout]   = help: consider adding `extern crate skiplist` to use the `skiplist` crate
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 1 previous error
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0432`.
[INFO] [stdout] Couldn't compile the test.
[INFO] [stdout] ---- src/skiplist.rs - skiplist::SkipList<T>::iter (line 599) stdout ----
[INFO] [stdout] error[E0432]: unresolved import `skiplist`
[INFO] [stdout]  --> src/skiplist.rs:600:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use skiplist::SkipList;
[INFO] [stdout]   |     ^^^^^^^^ maybe a missing crate `skiplist`?
[INFO] [stdout]   |
[INFO] [stdout]   = help: consider adding `extern crate skiplist` to use the `skiplist` crate
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 1 previous error
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0432`.
[INFO] [stdout] Couldn't compile the test.
[INFO] [stdout] ---- src/skiplist.rs - skiplist::SkipList<T>::len (line 106) stdout ----
[INFO] [stdout] error[E0432]: unresolved import `skiplist`
[INFO] [stdout]  --> src/skiplist.rs:107:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use skiplist::SkipList;
[INFO] [stdout]   |     ^^^^^^^^ maybe a missing crate `skiplist`?
[INFO] [stdout]   |
[INFO] [stdout]   = help: consider adding `extern crate skiplist` to use the `skiplist` crate
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 1 previous error
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0432`.
[INFO] [stdout] Couldn't compile the test.
[INFO] [stdout] ---- src/skiplist.rs - skiplist::SkipList<T>::push_front (line 233) stdout ----
[INFO] [stdout] error[E0432]: unresolved import `skiplist`
[INFO] [stdout]  --> src/skiplist.rs:234:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use skiplist::SkipList;
[INFO] [stdout]   |     ^^^^^^^^ maybe a missing crate `skiplist`?
[INFO] [stdout]   |
[INFO] [stdout]   = help: consider adding `extern crate skiplist` to use the `skiplist` crate
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 1 previous error
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0432`.
[INFO] [stdout] Couldn't compile the test.
[INFO] [stdout] ---- src/skiplist.rs - skiplist::SkipList<T>::new (line 38) stdout ----
[INFO] [stdout] error[E0432]: unresolved import `skiplist`
[INFO] [stdout]  --> src/skiplist.rs:39:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use skiplist::SkipList;
[INFO] [stdout]   |     ^^^^^^^^ maybe a missing crate `skiplist`?
[INFO] [stdout]   |
[INFO] [stdout]   = help: consider adding `extern crate skiplist` to use the `skiplist` crate
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 1 previous error
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0432`.
[INFO] [stdout] Couldn't compile the test.
[INFO] [stdout] ---- src/skiplist.rs - skiplist::SkipList<T>::pop_back (line 431) stdout ----
[INFO] [stdout] error[E0432]: unresolved import `skiplist`
[INFO] [stdout]  --> src/skiplist.rs:432:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use skiplist::SkipList;
[INFO] [stdout]   |     ^^^^^^^^ maybe a missing crate `skiplist`?
[INFO] [stdout]   |
[INFO] [stdout]   = help: consider adding `extern crate skiplist` to use the `skiplist` crate
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 1 previous error
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0432`.
[INFO] [stdout] Couldn't compile the test.
[INFO] [stdout] ---- src/skiplist.rs - skiplist::SkipList<T>::push_back (line 248) stdout ----
[INFO] [stdout] error[E0432]: unresolved import `skiplist`
[INFO] [stdout]  --> src/skiplist.rs:249:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use skiplist::SkipList;
[INFO] [stdout]   |     ^^^^^^^^ maybe a missing crate `skiplist`?
[INFO] [stdout]   |
[INFO] [stdout]   = help: consider adding `extern crate skiplist` to use the `skiplist` crate
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 1 previous error
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0432`.
[INFO] [stdout] Couldn't compile the test.
[INFO] [stdout] ---- src/skiplist.rs - skiplist::SkipList<T>::pop_front (line 407) stdout ----
[INFO] [stdout] error[E0432]: unresolved import `skiplist`
[INFO] [stdout]  --> src/skiplist.rs:408:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use skiplist::SkipList;
[INFO] [stdout]   |     ^^^^^^^^ maybe a missing crate `skiplist`?
[INFO] [stdout]   |
[INFO] [stdout]   = help: consider adding `extern crate skiplist` to use the `skiplist` crate
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 1 previous error
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0432`.
[INFO] [stdout] Couldn't compile the test.
[INFO] [stdout] ---- src/skiplist.rs - skiplist::SkipList<T>::range (line 646) stdout ----
[INFO] [stdout] error[E0433]: failed to resolve: maybe a missing crate `skiplist`?
[INFO] [stdout]  --> src/skiplist.rs:648:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | use skiplist::Bound::{Included, Unbounded};
[INFO] [stdout]   |     ^^^^^^^^ maybe a missing crate `skiplist`?
[INFO] [stdout]   |
[INFO] [stdout]   = help: consider adding `extern crate skiplist` to use the `skiplist` crate
[INFO] [stdout] 
[INFO] [stdout] error[E0432]: unresolved import `skiplist`
[INFO] [stdout]  --> src/skiplist.rs:647:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use skiplist::SkipList;
[INFO] [stdout]   |     ^^^^^^^^ maybe a missing crate `skiplist`?
[INFO] [stdout]   |
[INFO] [stdout]   = help: consider adding `extern crate skiplist` to use the `skiplist` crate
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 previous errors
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0432, E0433.
[INFO] [stdout] For more information about an error, try `rustc --explain E0432`.
[INFO] [stdout] Couldn't compile the test.
[INFO] [stdout] ---- src/skiplist.rs - skiplist::SkipList<T>::remove (line 460) stdout ----
[INFO] [stdout] error[E0432]: unresolved import `skiplist`
[INFO] [stdout]  --> src/skiplist.rs:461:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use skiplist::SkipList;
[INFO] [stdout]   |     ^^^^^^^^ maybe a missing crate `skiplist`?
[INFO] [stdout]   |
[INFO] [stdout]   = help: consider adding `extern crate skiplist` to use the `skiplist` crate
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 1 previous error
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0432`.
[INFO] [stdout] Couldn't compile the test.
[INFO] [stdout] ---- src/skiplist.rs - skiplist::SkipList<T>::with_capacity (line 59) stdout ----
[INFO] [stdout] error[E0432]: unresolved import `skiplist`
[INFO] [stdout]  --> src/skiplist.rs:60:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use skiplist::SkipList;
[INFO] [stdout]   |     ^^^^^^^^ maybe a missing crate `skiplist`?
[INFO] [stdout]   |
[INFO] [stdout]   = help: consider adding `extern crate skiplist` to use the `skiplist` crate
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 1 previous error
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0432`.
[INFO] [stdout] Couldn't compile the test.
[INFO] [stdout] ---- src/skipmap.rs - skipmap::SkipMap<K,V>::back (line 410) stdout ----
[INFO] [stdout] error[E0432]: unresolved import `skiplist`
[INFO] [stdout]  --> src/skipmap.rs:411:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use skiplist::SkipMap;
[INFO] [stdout]   |     ^^^^^^^^ maybe a missing crate `skiplist`?
[INFO] [stdout]   |
[INFO] [stdout]   = help: consider adding `extern crate skiplist` to use the `skiplist` crate
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 1 previous error
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0432`.
[INFO] [stdout] Couldn't compile the test.
[INFO] [stdout] ---- src/skiplist.rs - skiplist::SkipList<T>::range_mut (line 709) stdout ----
[INFO] [stdout] error[E0433]: failed to resolve: maybe a missing crate `skiplist`?
[INFO] [stdout]  --> src/skiplist.rs:711:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | use skiplist::Bound::{Included, Unbounded};
[INFO] [stdout]   |     ^^^^^^^^ maybe a missing crate `skiplist`?
[INFO] [stdout]   |
[INFO] [stdout]   = help: consider adding `extern crate skiplist` to use the `skiplist` crate
[INFO] [stdout] 
[INFO] [stdout] error[E0432]: unresolved import `skiplist`
[INFO] [stdout]  --> src/skiplist.rs:710:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use skiplist::SkipList;
[INFO] [stdout]   |     ^^^^^^^^ maybe a missing crate `skiplist`?
[INFO] [stdout]   |
[INFO] [stdout]   = help: consider adding `extern crate skiplist` to use the `skiplist` crate
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 previous errors
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0432, E0433.
[INFO] [stdout] For more information about an error, try `rustc --explain E0432`.
[INFO] [stdout] Couldn't compile the test.
[INFO] [stdout] ---- src/skipmap.rs - skipmap::SkipMap<K,V>::clear (line 294) stdout ----
[INFO] [stdout] error[E0432]: unresolved import `skiplist`
[INFO] [stdout]  --> src/skipmap.rs:295:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use skiplist::SkipMap;
[INFO] [stdout]   |     ^^^^^^^^ maybe a missing crate `skiplist`?
[INFO] [stdout]   |
[INFO] [stdout]   = help: consider adding `extern crate skiplist` to use the `skiplist` crate
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 1 previous error
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0432`.
[INFO] [stdout] Couldn't compile the test.
[INFO] [stdout] ---- src/skiplist.rs - skiplist::SkipList<T>::retain (line 515) stdout ----
[INFO] [stdout] error[E0432]: unresolved import `skiplist`
[INFO] [stdout]  --> src/skiplist.rs:516:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use skiplist::SkipList;
[INFO] [stdout]   |     ^^^^^^^^ maybe a missing crate `skiplist`?
[INFO] [stdout]   |
[INFO] [stdout]   = help: consider adding `extern crate skiplist` to use the `skiplist` crate
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 1 previous error
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0432`.
[INFO] [stdout] Couldn't compile the test.
[INFO] [stdout] ---- src/skipmap.rs - skipmap::SkipMap<K,V>::front (line 354) stdout ----
[INFO] [stdout] error[E0432]: unresolved import `skiplist`
[INFO] [stdout]  --> src/skipmap.rs:355:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use skiplist::SkipMap;
[INFO] [stdout]   |     ^^^^^^^^ maybe a missing crate `skiplist`?
[INFO] [stdout]   |
[INFO] [stdout]   = help: consider adding `extern crate skiplist` to use the `skiplist` crate
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 1 previous error
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0432`.
[INFO] [stdout] Couldn't compile the test.
[INFO] [stdout] ---- src/skipmap.rs - skipmap::SkipMap<K,V>::back_mut (line 440) stdout ----
[INFO] [stdout] error[E0432]: unresolved import `skiplist`
[INFO] [stdout]  --> src/skipmap.rs:441:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use skiplist::SkipMap;
[INFO] [stdout]   |     ^^^^^^^^ maybe a missing crate `skiplist`?
[INFO] [stdout]   |
[INFO] [stdout]   = help: consider adding `extern crate skiplist` to use the `skiplist` crate
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 1 previous error
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0432`.
[INFO] [stdout] Couldn't compile the test.
[INFO] [stdout] ---- src/skipmap.rs - skipmap::SkipMap<K,V>::contains_key (line 609) stdout ----
[INFO] [stdout] error[E0432]: unresolved import `skiplist`
[INFO] [stdout]  --> src/skipmap.rs:610:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use skiplist::SkipMap;
[INFO] [stdout]   |     ^^^^^^^^ maybe a missing crate `skiplist`?
[INFO] [stdout]   |
[INFO] [stdout]   = help: consider adding `extern crate skiplist` to use the `skiplist` crate
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 1 previous error
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0432`.
[INFO] [stdout] Couldn't compile the test.
[INFO] [stdout] ---- src/skipmap.rs - skipmap::SkipMap<K,V>::front_mut (line 383) stdout ----
[INFO] [stdout] error[E0432]: unresolved import `skiplist`
[INFO] [stdout]  --> src/skipmap.rs:384:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use skiplist::SkipMap;
[INFO] [stdout]   |     ^^^^^^^^ maybe a missing crate `skiplist`?
[INFO] [stdout]   |
[INFO] [stdout]   = help: consider adding `extern crate skiplist` to use the `skiplist` crate
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 1 previous error
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0432`.
[INFO] [stdout] Couldn't compile the test.
[INFO] [stdout] ---- src/skipmap.rs - skipmap::SkipMap<K,V>::insert (line 181) stdout ----
[INFO] [stdout] error[E0432]: unresolved import `skiplist`
[INFO] [stdout]  --> src/skipmap.rs:182:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use skiplist::SkipMap;
[INFO] [stdout]   |     ^^^^^^^^ maybe a missing crate `skiplist`?
[INFO] [stdout]   |
[INFO] [stdout]   = help: consider adding `extern crate skiplist` to use the `skiplist` crate
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 1 previous error
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0432`.
[INFO] [stdout] Couldn't compile the test.
[INFO] [stdout] ---- src/skipmap.rs - skipmap::SkipMap<K,V>::into_iter (line 809) stdout ----
[INFO] [stdout] error[E0432]: unresolved import `skiplist`
[INFO] [stdout]  --> src/skipmap.rs:810:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use skiplist::SkipMap;
[INFO] [stdout]   |     ^^^^^^^^ maybe a missing crate `skiplist`?
[INFO] [stdout]   |
[INFO] [stdout]   = help: consider adding `extern crate skiplist` to use the `skiplist` crate
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 1 previous error
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0432`.
[INFO] [stdout] Couldn't compile the test.
[INFO] [stdout] ---- src/skipmap.rs - skipmap::SkipMap<K,V>::get_mut (line 513) stdout ----
[INFO] [stdout] error[E0432]: unresolved import `skiplist`
[INFO] [stdout]  --> src/skipmap.rs:514:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use skiplist::SkipMap;
[INFO] [stdout]   |     ^^^^^^^^ maybe a missing crate `skiplist`?
[INFO] [stdout]   |
[INFO] [stdout]   = help: consider adding `extern crate skiplist` to use the `skiplist` crate
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 1 previous error
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0432`.
[INFO] [stdout] Couldn't compile the test.
[INFO] [stdout] ---- src/skipmap.rs - skipmap::SkipMap<K,V>::is_empty (line 336) stdout ----
[INFO] [stdout] error[E0432]: unresolved import `skiplist`
[INFO] [stdout]  --> src/skipmap.rs:337:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use skiplist::SkipMap;
[INFO] [stdout]   |     ^^^^^^^^ maybe a missing crate `skiplist`?
[INFO] [stdout]   |
[INFO] [stdout]   = help: consider adding `extern crate skiplist` to use the `skiplist` crate
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 1 previous error
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0432`.
[INFO] [stdout] Couldn't compile the test.
[INFO] [stdout] ---- src/skipmap.rs - skipmap::SkipMap<K,V>::iter_mut (line 856) stdout ----
[INFO] [stdout] error[E0432]: unresolved import `skiplist`
[INFO] [stdout]  --> src/skipmap.rs:857:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use skiplist::SkipMap;
[INFO] [stdout]   |     ^^^^^^^^ maybe a missing crate `skiplist`?
[INFO] [stdout]   |
[INFO] [stdout]   = help: consider adding `extern crate skiplist` to use the `skiplist` crate
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 1 previous error
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0432`.
[INFO] [stdout] Couldn't compile the test.
[INFO] [stdout] ---- src/skipmap.rs - skipmap::SkipMap<K,V>::get (line 469) stdout ----
[INFO] [stdout] error[E0432]: unresolved import `skiplist`
[INFO] [stdout]  --> src/skipmap.rs:470:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use skiplist::SkipMap;
[INFO] [stdout]   |     ^^^^^^^^ maybe a missing crate `skiplist`?
[INFO] [stdout]   |
[INFO] [stdout]   = help: consider adding `extern crate skiplist` to use the `skiplist` crate
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 1 previous error
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0432`.
[INFO] [stdout] Couldn't compile the test.
[INFO] [stdout] ---- src/skipmap.rs - skipmap::SkipMap<K,V>::iter (line 831) stdout ----
[INFO] [stdout] error[E0432]: unresolved import `skiplist`
[INFO] [stdout]  --> src/skipmap.rs:832:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use skiplist::SkipMap;
[INFO] [stdout]   |     ^^^^^^^^ maybe a missing crate `skiplist`?
[INFO] [stdout]   |
[INFO] [stdout]   = help: consider adding `extern crate skiplist` to use the `skiplist` crate
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 1 previous error
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0432`.
[INFO] [stdout] Couldn't compile the test.
[INFO] [stdout] ---- src/skipmap.rs - skipmap::SkipMap<K,V>::remove_index (line 757) stdout ----
[INFO] [stdout] error[E0432]: unresolved import `skiplist`
[INFO] [stdout]  --> src/skipmap.rs:758:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use skiplist::SkipMap;
[INFO] [stdout]   |     ^^^^^^^^ maybe a missing crate `skiplist`?
[INFO] [stdout]   |
[INFO] [stdout]   = help: consider adding `extern crate skiplist` to use the `skiplist` crate
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 1 previous error
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0432`.
[INFO] [stdout] Couldn't compile the test.
[INFO] [stdout] ---- src/skipmap.rs - skipmap::SkipMap<K,V>::len (line 320) stdout ----
[INFO] [stdout] error[E0432]: unresolved import `skiplist`
[INFO] [stdout]  --> src/skipmap.rs:321:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use skiplist::SkipMap;
[INFO] [stdout]   |     ^^^^^^^^ maybe a missing crate `skiplist`?
[INFO] [stdout]   |
[INFO] [stdout]   = help: consider adding `extern crate skiplist` to use the `skiplist` crate
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 1 previous error
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0432`.
[INFO] [stdout] Couldn't compile the test.
[INFO] [stdout] ---- src/skipmap.rs - skipmap::SkipMap<K,V>::pop_back (line 584) stdout ----
[INFO] [stdout] error[E0432]: unresolved import `skiplist`
[INFO] [stdout]  --> src/skipmap.rs:585:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use skiplist::SkipMap;
[INFO] [stdout]   |     ^^^^^^^^ maybe a missing crate `skiplist`?
[INFO] [stdout]   |
[INFO] [stdout]   = help: consider adding `extern crate skiplist` to use the `skiplist` crate
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 1 previous error
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0432`.
[INFO] [stdout] Couldn't compile the test.
[INFO] [stdout] ---- src/skipmap.rs - skipmap::SkipMap<K,V>::new (line 139) stdout ----
[INFO] [stdout] error[E0432]: unresolved import `skiplist`
[INFO] [stdout]  --> src/skipmap.rs:140:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use skiplist::SkipMap;
[INFO] [stdout]   |     ^^^^^^^^ maybe a missing crate `skiplist`?
[INFO] [stdout]   |
[INFO] [stdout]   = help: consider adding `extern crate skiplist` to use the `skiplist` crate
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 1 previous error
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0432`.
[INFO] [stdout] Couldn't compile the test.
[INFO] [stdout] ---- src/skipmap.rs - skipmap::SkipMap<K,V>::keys (line 879) stdout ----
[INFO] [stdout] error[E0432]: unresolved import `skiplist`
[INFO] [stdout]  --> src/skipmap.rs:880:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use skiplist::SkipMap;
[INFO] [stdout]   |     ^^^^^^^^ maybe a missing crate `skiplist`?
[INFO] [stdout]   |
[INFO] [stdout]   = help: consider adding `extern crate skiplist` to use the `skiplist` crate
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 1 previous error
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0432`.
[INFO] [stdout] Couldn't compile the test.
[INFO] [stdout] ---- src/skipmap.rs - skipmap::SkipMap<K,V>::range (line 926) stdout ----
[INFO] [stdout] error[E0433]: failed to resolve: maybe a missing crate `skiplist`?
[INFO] [stdout]  --> src/skipmap.rs:928:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | use skiplist::Bound::{Included, Unbounded};
[INFO] [stdout]   |     ^^^^^^^^ maybe a missing crate `skiplist`?
[INFO] [stdout]   |
[INFO] [stdout]   = help: consider adding `extern crate skiplist` to use the `skiplist` crate
[INFO] [stdout] 
[INFO] [stdout] error[E0432]: unresolved import `skiplist`
[INFO] [stdout]  --> src/skipmap.rs:927:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use skiplist::SkipMap;
[INFO] [stdout]   |     ^^^^^^^^ maybe a missing crate `skiplist`?
[INFO] [stdout]   |
[INFO] [stdout]   = help: consider adding `extern crate skiplist` to use the `skiplist` crate
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 previous errors
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0432, E0433.
[INFO] [stdout] For more information about an error, try `rustc --explain E0432`.
[INFO] [stdout] Couldn't compile the test.
[INFO] [stdout] ---- src/skipmap.rs - skipmap::SkipMap<K,V>::remove (line 654) stdout ----
[INFO] [stdout] error[E0432]: unresolved import `skiplist`
[INFO] [stdout]  --> src/skipmap.rs:655:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use skiplist::SkipMap;
[INFO] [stdout]   |     ^^^^^^^^ maybe a missing crate `skiplist`?
[INFO] [stdout]   |
[INFO] [stdout]   = help: consider adding `extern crate skiplist` to use the `skiplist` crate
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 1 previous error
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0432`.
[INFO] [stdout] Couldn't compile the test.
[INFO] [stdout] ---- src/skipmap.rs - skipmap::SkipMap<K,V>::pop_front (line 560) stdout ----
[INFO] [stdout] error[E0432]: unresolved import `skiplist`
[INFO] [stdout]  --> src/skipmap.rs:561:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use skiplist::SkipMap;
[INFO] [stdout]   |     ^^^^^^^^ maybe a missing crate `skiplist`?
[INFO] [stdout]   |
[INFO] [stdout]   = help: consider adding `extern crate skiplist` to use the `skiplist` crate
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 1 previous error
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0432`.
[INFO] [stdout] Couldn't compile the test.
[INFO] [stdout] ---- src/skipmap.rs - skipmap::SkipMap<K,V>::values (line 901) stdout ----
[INFO] [stdout] error[E0432]: unresolved import `skiplist`
[INFO] [stdout]  --> src/skipmap.rs:902:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use skiplist::SkipMap;
[INFO] [stdout]   |     ^^^^^^^^ maybe a missing crate `skiplist`?
[INFO] [stdout]   |
[INFO] [stdout]   = help: consider adding `extern crate skiplist` to use the `skiplist` crate
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 1 previous error
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0432`.
[INFO] [stdout] Couldn't compile the test.
[INFO] [stdout] ---- src/skipmap.rs - skipmap::SkipMap<K,V>::with_capacity (line 160) stdout ----
[INFO] [stdout] error[E0432]: unresolved import `skiplist`
[INFO] [stdout]  --> src/skipmap.rs:161:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use skiplist::SkipMap;
[INFO] [stdout]   |     ^^^^^^^^ maybe a missing crate `skiplist`?
[INFO] [stdout]   |
[INFO] [stdout]   = help: consider adding `extern crate skiplist` to use the `skiplist` crate
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 1 previous error
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0432`.
[INFO] [stdout] Couldn't compile the test.
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout]     src/ordered_skiplist.rs - ordered_skiplist::OrderedSkipList<T>::back (line 390)
[INFO] [stdout]     src/ordered_skiplist.rs - ordered_skiplist::OrderedSkipList<T>::clear (line 222)
[INFO] [stdout]     src/ordered_skiplist.rs - ordered_skiplist::OrderedSkipList<T>::contains (line 487)
[INFO] [stdout]     src/ordered_skiplist.rs - ordered_skiplist::OrderedSkipList<T>::dedup (line 857)
[INFO] [stdout]     src/ordered_skiplist.rs - ordered_skiplist::OrderedSkipList<T>::front (line 367)
[INFO] [stdout]     src/ordered_skiplist.rs - ordered_skiplist::OrderedSkipList<T>::get (line 415)
[INFO] [stdout]     src/ordered_skiplist.rs - ordered_skiplist::OrderedSkipList<T>::insert (line 282)
[INFO] [stdout]     src/ordered_skiplist.rs - ordered_skiplist::OrderedSkipList<T>::into_iter (line 932)
[INFO] [stdout]     src/ordered_skiplist.rs - ordered_skiplist::OrderedSkipList<T>::is_empty (line 264)
[INFO] [stdout]     src/ordered_skiplist.rs - ordered_skiplist::OrderedSkipList<T>::iter (line 954)
[INFO] [stdout]     src/ordered_skiplist.rs - ordered_skiplist::OrderedSkipList<T>::len (line 248)
[INFO] [stdout]     src/ordered_skiplist.rs - ordered_skiplist::OrderedSkipList<T>::new (line 67)
[INFO] [stdout]     src/ordered_skiplist.rs - ordered_skiplist::OrderedSkipList<T>::pop_back (line 462)
[INFO] [stdout]     src/ordered_skiplist.rs - ordered_skiplist::OrderedSkipList<T>::pop_front (line 438)
[INFO] [stdout]     src/ordered_skiplist.rs - ordered_skiplist::OrderedSkipList<T>::range (line 979)
[INFO] [stdout]     src/ordered_skiplist.rs - ordered_skiplist::OrderedSkipList<T>::remove (line 534)
[INFO] [stdout]     src/ordered_skiplist.rs - ordered_skiplist::OrderedSkipList<T>::remove_first (line 633)
[INFO] [stdout]     src/ordered_skiplist.rs - ordered_skiplist::OrderedSkipList<T>::remove_index (line 740)
[INFO] [stdout]     src/ordered_skiplist.rs - ordered_skiplist::OrderedSkipList<T>::retain (line 795)
[INFO] [stdout]     src/ordered_skiplist.rs - ordered_skiplist::OrderedSkipList<T>::with_capacity (line 99)
[INFO] [stdout]     src/ordered_skiplist.rs - ordered_skiplist::OrderedSkipList<T>::with_comp (line 139)
[INFO] [stdout]     src/skiplist.rs - skiplist::SkipList<T>::back (line 311)
[INFO] [stdout]     src/skiplist.rs - skiplist::SkipList<T>::back_mut (line 335)
[INFO] [stdout]     src/skiplist.rs - skiplist::SkipList<T>::clear (line 80)
[INFO] [stdout]     src/skiplist.rs - skiplist::SkipList<T>::contains (line 772)
[INFO] [stdout]     src/skiplist.rs - skiplist::SkipList<T>::dedup (line 796)
[INFO] [stdout]     src/skiplist.rs - skiplist::SkipList<T>::front (line 265)
[INFO] [stdout]     src/skiplist.rs - skiplist::SkipList<T>::front_mut (line 288)
[INFO] [stdout]     src/skiplist.rs - skiplist::SkipList<T>::get (line 360)
[INFO] [stdout]     src/skiplist.rs - skiplist::SkipList<T>::get_mut (line 384)
[INFO] [stdout]     src/skiplist.rs - skiplist::SkipList<T>::insert (line 144)
[INFO] [stdout]     src/skiplist.rs - skiplist::SkipList<T>::into_iter (line 577)
[INFO] [stdout]     src/skiplist.rs - skiplist::SkipList<T>::is_empty (line 122)
[INFO] [stdout]     src/skiplist.rs - skiplist::SkipList<T>::iter (line 599)
[INFO] [stdout]     src/skiplist.rs - skiplist::SkipList<T>::iter_mut (line 621)
[INFO] [stdout]     src/skiplist.rs - skiplist::SkipList<T>::len (line 106)
[INFO] [stdout]     src/skiplist.rs - skiplist::SkipList<T>::new (line 38)
[INFO] [stdout]     src/skiplist.rs - skiplist::SkipList<T>::pop_back (line 431)
[INFO] [stdout]     src/skiplist.rs - skiplist::SkipList<T>::pop_front (line 407)
[INFO] [stdout]     src/skiplist.rs - skiplist::SkipList<T>::push_back (line 248)
[INFO] [stdout]     src/skiplist.rs - skiplist::SkipList<T>::push_front (line 233)
[INFO] [stdout]     src/skiplist.rs - skiplist::SkipList<T>::range (line 646)
[INFO] [stdout]     src/skiplist.rs - skiplist::SkipList<T>::range_mut (line 709)
[INFO] [stdout]     src/skiplist.rs - skiplist::SkipList<T>::remove (line 460)
[INFO] [stdout]     src/skiplist.rs - skiplist::SkipList<T>::retain (line 515)
[INFO] [stdout]     src/skiplist.rs - skiplist::SkipList<T>::with_capacity (line 59)
[INFO] [stdout]     src/skipmap.rs - skipmap::SkipMap<K,V>::back (line 410)
[INFO] [stdout]     src/skipmap.rs - skipmap::SkipMap<K,V>::back_mut (line 440)
[INFO] [stdout]     src/skipmap.rs - skipmap::SkipMap<K,V>::clear (line 294)
[INFO] [stdout]     src/skipmap.rs - skipmap::SkipMap<K,V>::contains_key (line 609)
[INFO] [stdout]     src/skipmap.rs - skipmap::SkipMap<K,V>::front (line 354)
[INFO] [stdout]     src/skipmap.rs - skipmap::SkipMap<K,V>::front_mut (line 383)
[INFO] [stdout]     src/skipmap.rs - skipmap::SkipMap<K,V>::get (line 469)
[INFO] [stdout]     src/skipmap.rs - skipmap::SkipMap<K,V>::get_mut (line 513)
[INFO] [stdout]     src/skipmap.rs - skipmap::SkipMap<K,V>::insert (line 181)
[INFO] [stdout]     src/skipmap.rs - skipmap::SkipMap<K,V>::into_iter (line 809)
[INFO] [stdout]     src/skipmap.rs - skipmap::SkipMap<K,V>::is_empty (line 336)
[INFO] [stdout]     src/skipmap.rs - skipmap::SkipMap<K,V>::iter (line 831)
[INFO] [stdout]     src/skipmap.rs - skipmap::SkipMap<K,V>::iter_mut (line 856)
[INFO] [stdout]     src/skipmap.rs - skipmap::SkipMap<K,V>::keys (line 879)
[INFO] [stdout]     src/skipmap.rs - skipmap::SkipMap<K,V>::len (line 320)
[INFO] [stdout]     src/skipmap.rs - skipmap::SkipMap<K,V>::new (line 139)
[INFO] [stdout]     src/skipmap.rs - skipmap::SkipMap<K,V>::pop_back (line 584)
[INFO] [stdout]     src/skipmap.rs - skipmap::SkipMap<K,V>::pop_front (line 560)
[INFO] [stdout]     src/skipmap.rs - skipmap::SkipMap<K,V>::range (line 926)
[INFO] [stdout]     src/skipmap.rs - skipmap::SkipMap<K,V>::remove (line 654)
[INFO] [stdout]     src/skipmap.rs - skipmap::SkipMap<K,V>::remove_index (line 757)
[INFO] [stdout]     src/skipmap.rs - skipmap::SkipMap<K,V>::values (line 901)
[INFO] [stdout]     src/skipmap.rs - skipmap::SkipMap<K,V>::with_capacity (line 160)
[INFO] [stdout] 
[INFO] [stdout] test result: FAILED. 0 passed; 69 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.53s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "439103c2f5329f159f9627b49e1bdcdc2228607c71274d3a120ab6f1a06af8e0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "439103c2f5329f159f9627b49e1bdcdc2228607c71274d3a120ab6f1a06af8e0", kill_on_drop: false }`
[INFO] [stdout] 439103c2f5329f159f9627b49e1bdcdc2228607c71274d3a120ab6f1a06af8e0
