[INFO] fetching crate stable-skiplist 0.1.1...
[INFO] checking stable-skiplist-0.1.1 against try#e4dba30b9b475d8750370c4dfb49b6541990904d for pr-71393
[INFO] extracting crate stable-skiplist 0.1.1 into /workspace/builds/worker-0/source
[INFO] validating manifest of crates.io crate stable-skiplist 0.1.1 on toolchain e4dba30b9b475d8750370c4dfb49b6541990904d
[INFO] running `"/workspace/cargo-home/bin/cargo" "+e4dba30b9b475d8750370c4dfb49b6541990904d" "read-manifest" "--manifest-path" "Cargo.toml"`
[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-0/source/Cargo.toml
[INFO] running `"/workspace/cargo-home/bin/cargo" "+e4dba30b9b475d8750370c4dfb49b6541990904d" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/workspace/cargo-home/bin/cargo" "+e4dba30b9b475d8750370c4dfb49b6541990904d" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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" "MAP_USER_ID=0" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+e4dba30b9b475d8750370c4dfb49b6541990904d" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 574174f87408109f6a7ffe53872f04c52fb1f8a39167640c36cdff93c21b8392
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `"docker" "start" "-a" "574174f87408109f6a7ffe53872f04c52fb1f8a39167640c36cdff93c21b8392"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling libc v0.2.69
[INFO] [stderr]     Checking rand v0.4.6
[INFO] [stderr]     Checking rand v0.3.23
[INFO] [stderr]     Checking stable-skiplist v0.1.1 (/opt/rustwide/workdir)
[INFO] [stderr] warning: use of deprecated item '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 item '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 item '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 item '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 item '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: use of deprecated item '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 item '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 item '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 item '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 item '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 item '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: use of deprecated item '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 item '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 item '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 item '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 item '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 item '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: use of deprecated item '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: 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]    |                  ^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn(&T, &T) -> Ordering`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(bare_trait_objects)]` on by default
[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]    |                        ^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn(&T, &T) -> Ordering`
[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]     |                        ^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn(&T, &T) -> Ordering`
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item '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 item '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 item '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 item '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 item '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: use of deprecated item '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 item '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 item '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 item '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 item '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 item '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: use of deprecated item '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 item '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 item '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 item '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 item '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 item '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: use of deprecated item '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: 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]    |                  ^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn(&T, &T) -> Ordering`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(bare_trait_objects)]` on by default
[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]    |                        ^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn(&T, &T) -> Ordering`
[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]     |                        ^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn(&T, &T) -> Ordering`
[INFO] [stderr] 
[INFO] [stderr] error[E0606]: casting `f64` as `usize` is invalid
[INFO] [stderr]    --> src/ordered_skiplist.rs:107:22
[INFO] [stderr]     |
[INFO] [stderr] 107 |         let levels = (capacity as f64).log2().floor() as usize;
[INFO] [stderr]     |                      ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0606]: casting `f64` as `usize` is invalid
[INFO] [stderr]    --> src/skipmap.rs:168:22
[INFO] [stderr]     |
[INFO] [stderr] 168 |         let levels = (capacity as f64).log2().floor() as usize;
[INFO] [stderr]     |                      ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0606]: casting `f64` as `usize` is invalid
[INFO] [stderr]    --> src/ordered_skiplist.rs:107:22
[INFO] [stderr]     |
[INFO] [stderr] 107 |         let levels = (capacity as f64).log2().floor() as usize;
[INFO] [stderr]     |                      ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0606]: casting `f64` as `usize` is invalid
[INFO] [stderr]   --> src/skiplist.rs:67:22
[INFO] [stderr]    |
[INFO] [stderr] 67 |         let levels = (capacity as f64).log2().floor() as usize;
[INFO] [stderr]    |                      ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 3 previous errors; 21 warnings emitted
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0606`.
[INFO] [stderr] error: could not compile `stable-skiplist`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error[E0606]: casting `f64` as `usize` is invalid
[INFO] [stderr]    --> src/skipmap.rs:168:22
[INFO] [stderr]     |
[INFO] [stderr] 168 |         let levels = (capacity as f64).log2().floor() as usize;
[INFO] [stderr]     |                      ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0606]: casting `f64` as `usize` is invalid
[INFO] [stderr]   --> src/skiplist.rs:67:22
[INFO] [stderr]    |
[INFO] [stderr] 67 |         let levels = (capacity as f64).log2().floor() as usize;
[INFO] [stderr]    |                      ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 3 previous errors; 21 warnings emitted
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0606`.
[INFO] [stderr] error: could not compile `stable-skiplist`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "574174f87408109f6a7ffe53872f04c52fb1f8a39167640c36cdff93c21b8392"`
[INFO] running `"docker" "rm" "-f" "574174f87408109f6a7ffe53872f04c52fb1f8a39167640c36cdff93c21b8392"`
[INFO] [stdout] 574174f87408109f6a7ffe53872f04c52fb1f8a39167640c36cdff93c21b8392