[INFO] fetching crate segmap 0.1.0...
[INFO] checking segmap-0.1.0 against master#f609b7e0586f81fefb3523e3e17adf779ac416be for pr-129466-2
[INFO] extracting crate segmap 0.1.0 into /workspace/builds/worker-7-tc1/source
[INFO] validating manifest of crates.io crate segmap 0.1.0 on toolchain f609b7e0586f81fefb3523e3e17adf779ac416be
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+f609b7e0586f81fefb3523e3e17adf779ac416be" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate segmap 0.1.0
[INFO] finished tweaking crates.io crate segmap 0.1.0
[INFO] tweaked toml for crates.io crate segmap 0.1.0 written to /workspace/builds/worker-7-tc1/source/Cargo.toml
[INFO] crate crates.io crate segmap 0.1.0 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+f609b7e0586f81fefb3523e3e17adf779ac416be" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded semver v1.0.3
[INFO] [stderr]   Downloaded rangemap v0.1.11
[INFO] [stderr]   Downloaded permutator v0.4.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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:ceb6ea022f8a89cebbe621bb4987e73a935bd40dfbb726f832cfff4742a5b95a" "/opt/rustwide/cargo-home/bin/cargo" "+f609b7e0586f81fefb3523e3e17adf779ac416be" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 8f4b0728082805497d5e8b96dc5ac018b60c4b15d7d5d8bf8371f0e771fcfb86
[INFO] running `Command { std: "docker" "start" "-a" "8f4b0728082805497d5e8b96dc5ac018b60c4b15d7d5d8bf8371f0e771fcfb86", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "8f4b0728082805497d5e8b96dc5ac018b60c4b15d7d5d8bf8371f0e771fcfb86", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8f4b0728082805497d5e8b96dc5ac018b60c4b15d7d5d8bf8371f0e771fcfb86", kill_on_drop: false }`
[INFO] [stdout] 8f4b0728082805497d5e8b96dc5ac018b60c4b15d7d5d8bf8371f0e771fcfb86
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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:ceb6ea022f8a89cebbe621bb4987e73a935bd40dfbb726f832cfff4742a5b95a" "/opt/rustwide/cargo-home/bin/cargo" "+f609b7e0586f81fefb3523e3e17adf779ac416be" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] fb621108bd9facbb97d464674d9155a77f2f646ed1853ded7af881df78ad12c1
[INFO] running `Command { std: "docker" "start" "-a" "fb621108bd9facbb97d464674d9155a77f2f646ed1853ded7af881df78ad12c1", kill_on_drop: false }`
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[INFO] [stderr]     Checking segmap v0.1.0 (/opt/rustwide/workdir)
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[INFO] [stdout] warning: unused return value of `Option::<T>::insert` that must be used
[INFO] [stdout]    --> src/map/iterators.rs:701:21
[INFO] [stdout]     |
[INFO] [stdout] 701 |                     self.0.insert(IterSubsetInner::Full(iter));
[INFO] [stdout]     |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: if you intended to set a value, consider assignment instead
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 701 |                     let _ = self.0.insert(IterSubsetInner::Full(iter));
[INFO] [stdout]     |                     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `Option::<T>::insert` that must be used
[INFO] [stdout]    --> src/map/iterators.rs:723:25
[INFO] [stdout]     |
[INFO] [stdout] 723 | /                         self.0.insert(IterSubsetInner::Partial {
[INFO] [stdout] 724 | |                             before: None,
[INFO] [stdout] 725 | |                             iter,
[INFO] [stdout] 726 | |                             range,
[INFO] [stdout] 727 | |                         });
[INFO] [stdout]     | |__________________________^
[INFO] [stdout]     |
[INFO] [stdout]     = note: if you intended to set a value, consider assignment instead
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 723 |                         let _ = self.0.insert(IterSubsetInner::Partial {
[INFO] [stdout]     |                         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `Option::<T>::insert` that must be used
[INFO] [stdout]    --> src/map/iterators.rs:746:25
[INFO] [stdout]     |
[INFO] [stdout] 746 | /                         self.0.insert(IterSubsetInner::Partial {
[INFO] [stdout] 747 | |                             before: None,
[INFO] [stdout] 748 | |                             iter,
[INFO] [stdout] 749 | |                             range,
[INFO] [stdout] 750 | |                         });
[INFO] [stdout]     | |__________________________^
[INFO] [stdout]     |
[INFO] [stdout]     = note: if you intended to set a value, consider assignment instead
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 746 |                         let _ = self.0.insert(IterSubsetInner::Partial {
[INFO] [stdout]     |                         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `Option::<T>::insert` that must be used
[INFO] [stdout]    --> src/map/iterators.rs:781:13
[INFO] [stdout]     |
[INFO] [stdout] 781 |             self.prev.insert(next);
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: if you intended to set a value, consider assignment instead
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 781 |             let _ = self.prev.insert(next);
[INFO] [stdout]     |             +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `Option::<T>::insert` that must be used
[INFO] [stdout]    --> src/map/iterators.rs:834:21
[INFO] [stdout]     |
[INFO] [stdout] 834 |                     self.0.insert(ComplementInner::Gaps(gaps));
[INFO] [stdout]     |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: if you intended to set a value, consider assignment instead
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 834 |                     let _ = self.0.insert(ComplementInner::Gaps(gaps));
[INFO] [stdout]     |                     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `Option::<T>::insert` that must be used
[INFO] [stdout]    --> src/map/iterators.rs:845:21
[INFO] [stdout]     |
[INFO] [stdout] 845 |                     self.0.insert(ComplementInner::Gaps(gaps));
[INFO] [stdout]     |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: if you intended to set a value, consider assignment instead
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 845 |                     let _ = self.0.insert(ComplementInner::Gaps(gaps));
[INFO] [stdout]     |                     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `Option::<T>::insert` that must be used
[INFO] [stdout]    --> src/set/ops/difference.rs:168:29
[INFO] [stdout]     |
[INFO] [stdout] 168 | ...                   prev_other.insert(other);
[INFO] [stdout]     |                       ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: if you intended to set a value, consider assignment instead
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 168 |                             let _ = prev_other.insert(other);
[INFO] [stdout]     |                             +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `Option::<T>::insert` that must be used
[INFO] [stdout]    --> src/set/ops/difference.rs:188:33
[INFO] [stdout]     |
[INFO] [stdout] 188 | ...                   prev_other.insert(other);
[INFO] [stdout]     |                       ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: if you intended to set a value, consider assignment instead
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 188 |                                 let _ = prev_other.insert(other);
[INFO] [stdout]     |                                 +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `Option::<T>::insert` that must be used
[INFO] [stdout]    --> src/set/ops/difference.rs:203:33
[INFO] [stdout]     |
[INFO] [stdout] 203 | ...                   prev_other.insert(other);
[INFO] [stdout]     |                       ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: if you intended to set a value, consider assignment instead
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 203 |                                 let _ = prev_other.insert(other);
[INFO] [stdout]     |                                 +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `Option::<T>::insert` that must be used
[INFO] [stdout]    --> src/set/ops/difference.rs:225:33
[INFO] [stdout]     |
[INFO] [stdout] 225 | / ...                   prev_self.insert(Segment {
[INFO] [stdout] 226 | | ...                       start: other.borrow_bound_after().unwrap(),
[INFO] [stdout] 227 | | ...                       end: core::mem::replace(
[INFO] [stdout] 228 | | ...                           &mut range.end,
[INFO] [stdout] 229 | | ...                           other.borrow_bound_before().unwrap(),
[INFO] [stdout] 230 | | ...                       ),
[INFO] [stdout] 231 | | ...                   });
[INFO] [stdout]     | |________________________^
[INFO] [stdout]     |
[INFO] [stdout]     = note: if you intended to set a value, consider assignment instead
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 225 |                                 let _ = prev_self.insert(Segment {
[INFO] [stdout]     |                                 +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `Option::<T>::insert` that must be used
[INFO] [stdout]    --> src/set/ops/intersection.rs:126:21
[INFO] [stdout]     |
[INFO] [stdout] 126 |                     self.prev_b.insert(next_b);
[INFO] [stdout]     |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: if you intended to set a value, consider assignment instead
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 126 |                     let _ = self.prev_b.insert(next_b);
[INFO] [stdout]     |                     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `Option::<T>::insert` that must be used
[INFO] [stdout]    --> src/set/ops/intersection.rs:138:21
[INFO] [stdout]     |
[INFO] [stdout] 138 |                     self.prev_a.insert(next_a);
[INFO] [stdout]     |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: if you intended to set a value, consider assignment instead
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 138 |                     let _ = self.prev_a.insert(next_a);
[INFO] [stdout]     |                     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `Option::<T>::insert` that must be used
[INFO] [stdout]    --> src/set/ops/intersection.rs:146:21
[INFO] [stdout]     |
[INFO] [stdout] 146 |                     self.prev_b.insert(next_b);
[INFO] [stdout]     |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: if you intended to set a value, consider assignment instead
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 146 |                     let _ = self.prev_b.insert(next_b);
[INFO] [stdout]     |                     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `Option::<T>::insert` that must be used
[INFO] [stdout]    --> src/set/ops/intersection.rs:157:21
[INFO] [stdout]     |
[INFO] [stdout] 157 |                     self.prev_a.insert(next_a);
[INFO] [stdout]     |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: if you intended to set a value, consider assignment instead
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 157 |                     let _ = self.prev_a.insert(next_a);
[INFO] [stdout]     |                     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `Option::<T>::insert` that must be used
[INFO] [stdout]    --> src/set/ops/intersection.rs:165:21
[INFO] [stdout]     |
[INFO] [stdout] 165 |                     self.prev_b.insert(next_b);
[INFO] [stdout]     |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: if you intended to set a value, consider assignment instead
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 165 |                     let _ = self.prev_b.insert(next_b);
[INFO] [stdout]     |                     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `Option::<T>::insert` that must be used
[INFO] [stdout]    --> src/set/ops/intersection.rs:178:21
[INFO] [stdout]     |
[INFO] [stdout] 178 |                     self.prev_a.insert(next_a);
[INFO] [stdout]     |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: if you intended to set a value, consider assignment instead
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 178 |                     let _ = self.prev_a.insert(next_a);
[INFO] [stdout]     |                     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `Option::<T>::insert` that must be used
[INFO] [stdout]    --> src/set/ops/symmetric_difference.rs:128:17
[INFO] [stdout]     |
[INFO] [stdout] 128 |                 self.prev_b.insert(next_b);
[INFO] [stdout]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: if you intended to set a value, consider assignment instead
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 128 |                 let _ = self.prev_b.insert(next_b);
[INFO] [stdout]     |                 +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `Option::<T>::insert` that must be used
[INFO] [stdout]    --> src/set/ops/symmetric_difference.rs:134:17
[INFO] [stdout]     |
[INFO] [stdout] 134 |                 self.prev_a.insert(next_a);
[INFO] [stdout]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: if you intended to set a value, consider assignment instead
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 134 |                 let _ = self.prev_a.insert(next_a);
[INFO] [stdout]     |                 +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `Option::<T>::insert` that must be used
[INFO] [stdout]    --> src/set/ops/symmetric_difference.rs:150:21
[INFO] [stdout]     |
[INFO] [stdout] 150 |                     self.prev_b.insert(next_b);
[INFO] [stdout]     |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: if you intended to set a value, consider assignment instead
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 150 |                     let _ = self.prev_b.insert(next_b);
[INFO] [stdout]     |                     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `Option::<T>::insert` that must be used
[INFO] [stdout]    --> src/set/ops/symmetric_difference.rs:165:21
[INFO] [stdout]     |
[INFO] [stdout] 165 | /                     self.prev_a.insert(Segment {
[INFO] [stdout] 166 | |                         start: next_b.borrow_bound_after().unwrap(),
[INFO] [stdout] 167 | |                         end: next_a.end,
[INFO] [stdout] 168 | |                     });
[INFO] [stdout]     | |______________________^
[INFO] [stdout]     |
[INFO] [stdout]     = note: if you intended to set a value, consider assignment instead
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 165 |                     let _ = self.prev_a.insert(Segment {
[INFO] [stdout]     |                     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `Option::<T>::insert` that must be used
[INFO] [stdout]    --> src/set/ops/symmetric_difference.rs:220:21
[INFO] [stdout]     |
[INFO] [stdout] 220 | /                     self.prev_b.insert(Segment {
[INFO] [stdout] 221 | |                         start: next_a.borrow_bound_after().unwrap(),
[INFO] [stdout] 222 | |                         end: next_b.end,
[INFO] [stdout] 223 | |                     });
[INFO] [stdout]     | |______________________^
[INFO] [stdout]     |
[INFO] [stdout]     = note: if you intended to set a value, consider assignment instead
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 220 |                     let _ = self.prev_b.insert(Segment {
[INFO] [stdout]     |                     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `Option::<T>::insert` that must be used
[INFO] [stdout]    --> src/set/ops/symmetric_difference.rs:245:21
[INFO] [stdout]     |
[INFO] [stdout] 245 |                     self.prev_a.insert(next_a);
[INFO] [stdout]     |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: if you intended to set a value, consider assignment instead
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 245 |                     let _ = self.prev_a.insert(next_a);
[INFO] [stdout]     |                     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `Option::<T>::insert` that must be used
[INFO] [stdout]   --> src/set/ops/union.rs:98:13
[INFO] [stdout]    |
[INFO] [stdout] 98 |             self.prev_b.insert(next_b);
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: if you intended to set a value, consider assignment instead
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 98 |             let _ = self.prev_b.insert(next_b);
[INFO] [stdout]    |             +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `Option::<T>::insert` that must be used
[INFO] [stdout]    --> src/set/ops/union.rs:104:13
[INFO] [stdout]     |
[INFO] [stdout] 104 |             self.prev_a.insert(next_a);
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: if you intended to set a value, consider assignment instead
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 104 |             let _ = self.prev_a.insert(next_a);
[INFO] [stdout]     |             +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `Option::<T>::insert` that must be used
[INFO] [stdout]    --> src/set/ops/union.rs:126:21
[INFO] [stdout]     |
[INFO] [stdout] 126 |                     self.prev_a.insert(r);
[INFO] [stdout]     |                     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: if you intended to set a value, consider assignment instead
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 126 |                     let _ = self.prev_a.insert(r);
[INFO] [stdout]     |                     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `Option::<T>::insert` that must be used
[INFO] [stdout]    --> src/set/ops/union.rs:142:21
[INFO] [stdout]     |
[INFO] [stdout] 142 |                     self.prev_b.insert(r);
[INFO] [stdout]     |                     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: if you intended to set a value, consider assignment instead
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 142 |                     let _ = self.prev_b.insert(r);
[INFO] [stdout]     |                     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 26 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking criterion v0.3.4
[INFO] [stdout] error[E0428]: the name `old_kitchen_sink` is defined multiple times
[INFO] [stdout]   --> benches/kitchen_sink.rs:40:1
[INFO] [stdout]    |
[INFO] [stdout] 24 | fn old_kitchen_sink(kvs: &[(Range<i32>, bool)]) {
[INFO] [stdout]    | ----------------------------------------------- previous definition of the value `old_kitchen_sink` here
[INFO] [stdout] ...
[INFO] [stdout] 40 | fn old_kitchen_sink(kvs: &[(Range<i32>, bool)]) {
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ `old_kitchen_sink` redefined here
[INFO] [stdout]    |
[INFO] [stdout]    = note: `old_kitchen_sink` must be defined only once in the value namespace of this module
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0432]: unresolved import `base`
[INFO] [stdout]   --> benches/kitchen_sink.rs:41:9
[INFO] [stdout]    |
[INFO] [stdout] 41 |     use base::RangeMap;
[INFO] [stdout]    |         ^^^^ use of undeclared crate or module `base`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no method named `clear_range` found for struct `RangeMap` in the current scope
[INFO] [stdout]   --> benches/kitchen_sink.rs:32:23
[INFO] [stdout]    |
[INFO] [stdout] 32 |             range_map.clear_range(range.clone());
[INFO] [stdout]    |                       ^^^^^^^^^^^ method not found in `RangeMap<i32, bool>`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no method named `set` found for struct `RangeMap` in the current scope
[INFO] [stdout]   --> benches/kitchen_sink.rs:34:23
[INFO] [stdout]    |
[INFO] [stdout] 34 |             range_map.set(range.clone(), *value);
[INFO] [stdout]    |                       ^^^
[INFO] [stdout]    |
[INFO] [stdout] help: there is a method `get` with a similar name, but with different arguments
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/rangemap-0.1.11/src/map.rs:44:5
[INFO] [stdout]    |
[INFO] [stdout] 44 |     pub fn get(&self, key: &K) -> Option<&V> {
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 4 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0428, E0432, E0599.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0428`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `segmap` (bench "kitchen_sink") due to 5 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] warning: unused return value of `Option::<T>::insert` that must be used
[INFO] [stdout]    --> src/map/iterators.rs:701:21
[INFO] [stdout]     |
[INFO] [stdout] 701 |                     self.0.insert(IterSubsetInner::Full(iter));
[INFO] [stdout]     |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: if you intended to set a value, consider assignment instead
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 701 |                     let _ = self.0.insert(IterSubsetInner::Full(iter));
[INFO] [stdout]     |                     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `Option::<T>::insert` that must be used
[INFO] [stdout]    --> src/map/iterators.rs:723:25
[INFO] [stdout]     |
[INFO] [stdout] 723 | /                         self.0.insert(IterSubsetInner::Partial {
[INFO] [stdout] 724 | |                             before: None,
[INFO] [stdout] 725 | |                             iter,
[INFO] [stdout] 726 | |                             range,
[INFO] [stdout] 727 | |                         });
[INFO] [stdout]     | |__________________________^
[INFO] [stdout]     |
[INFO] [stdout]     = note: if you intended to set a value, consider assignment instead
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 723 |                         let _ = self.0.insert(IterSubsetInner::Partial {
[INFO] [stdout]     |                         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `Option::<T>::insert` that must be used
[INFO] [stdout]    --> src/map/iterators.rs:746:25
[INFO] [stdout]     |
[INFO] [stdout] 746 | /                         self.0.insert(IterSubsetInner::Partial {
[INFO] [stdout] 747 | |                             before: None,
[INFO] [stdout] 748 | |                             iter,
[INFO] [stdout] 749 | |                             range,
[INFO] [stdout] 750 | |                         });
[INFO] [stdout]     | |__________________________^
[INFO] [stdout]     |
[INFO] [stdout]     = note: if you intended to set a value, consider assignment instead
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 746 |                         let _ = self.0.insert(IterSubsetInner::Partial {
[INFO] [stdout]     |                         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `Option::<T>::insert` that must be used
[INFO] [stdout]    --> src/map/iterators.rs:781:13
[INFO] [stdout]     |
[INFO] [stdout] 781 |             self.prev.insert(next);
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: if you intended to set a value, consider assignment instead
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 781 |             let _ = self.prev.insert(next);
[INFO] [stdout]     |             +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `Option::<T>::insert` that must be used
[INFO] [stdout]    --> src/map/iterators.rs:834:21
[INFO] [stdout]     |
[INFO] [stdout] 834 |                     self.0.insert(ComplementInner::Gaps(gaps));
[INFO] [stdout]     |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: if you intended to set a value, consider assignment instead
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 834 |                     let _ = self.0.insert(ComplementInner::Gaps(gaps));
[INFO] [stdout]     |                     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `Option::<T>::insert` that must be used
[INFO] [stdout]    --> src/map/iterators.rs:845:21
[INFO] [stdout]     |
[INFO] [stdout] 845 |                     self.0.insert(ComplementInner::Gaps(gaps));
[INFO] [stdout]     |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: if you intended to set a value, consider assignment instead
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 845 |                     let _ = self.0.insert(ComplementInner::Gaps(gaps));
[INFO] [stdout]     |                     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `Option::<T>::insert` that must be used
[INFO] [stdout]    --> src/set/ops/difference.rs:168:29
[INFO] [stdout]     |
[INFO] [stdout] 168 | ...                   prev_other.insert(other);
[INFO] [stdout]     |                       ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: if you intended to set a value, consider assignment instead
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 168 |                             let _ = prev_other.insert(other);
[INFO] [stdout]     |                             +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `Option::<T>::insert` that must be used
[INFO] [stdout]    --> src/set/ops/difference.rs:188:33
[INFO] [stdout]     |
[INFO] [stdout] 188 | ...                   prev_other.insert(other);
[INFO] [stdout]     |                       ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: if you intended to set a value, consider assignment instead
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 188 |                                 let _ = prev_other.insert(other);
[INFO] [stdout]     |                                 +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `Option::<T>::insert` that must be used
[INFO] [stdout]    --> src/set/ops/difference.rs:203:33
[INFO] [stdout]     |
[INFO] [stdout] 203 | ...                   prev_other.insert(other);
[INFO] [stdout]     |                       ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: if you intended to set a value, consider assignment instead
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 203 |                                 let _ = prev_other.insert(other);
[INFO] [stdout]     |                                 +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `Option::<T>::insert` that must be used
[INFO] [stdout]    --> src/set/ops/difference.rs:225:33
[INFO] [stdout]     |
[INFO] [stdout] 225 | / ...                   prev_self.insert(Segment {
[INFO] [stdout] 226 | | ...                       start: other.borrow_bound_after().unwrap(),
[INFO] [stdout] 227 | | ...                       end: core::mem::replace(
[INFO] [stdout] 228 | | ...                           &mut range.end,
[INFO] [stdout] 229 | | ...                           other.borrow_bound_before().unwrap(),
[INFO] [stdout] 230 | | ...                       ),
[INFO] [stdout] 231 | | ...                   });
[INFO] [stdout]     | |________________________^
[INFO] [stdout]     |
[INFO] [stdout]     = note: if you intended to set a value, consider assignment instead
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 225 |                                 let _ = prev_self.insert(Segment {
[INFO] [stdout]     |                                 +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `Option::<T>::insert` that must be used
[INFO] [stdout]    --> src/set/ops/intersection.rs:126:21
[INFO] [stdout]     |
[INFO] [stdout] 126 |                     self.prev_b.insert(next_b);
[INFO] [stdout]     |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: if you intended to set a value, consider assignment instead
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 126 |                     let _ = self.prev_b.insert(next_b);
[INFO] [stdout]     |                     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `Option::<T>::insert` that must be used
[INFO] [stdout]    --> src/set/ops/intersection.rs:138:21
[INFO] [stdout]     |
[INFO] [stdout] 138 |                     self.prev_a.insert(next_a);
[INFO] [stdout]     |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: if you intended to set a value, consider assignment instead
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 138 |                     let _ = self.prev_a.insert(next_a);
[INFO] [stdout]     |                     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `Option::<T>::insert` that must be used
[INFO] [stdout]    --> src/set/ops/intersection.rs:146:21
[INFO] [stdout]     |
[INFO] [stdout] 146 |                     self.prev_b.insert(next_b);
[INFO] [stdout]     |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: if you intended to set a value, consider assignment instead
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 146 |                     let _ = self.prev_b.insert(next_b);
[INFO] [stdout]     |                     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `Option::<T>::insert` that must be used
[INFO] [stdout]    --> src/set/ops/intersection.rs:157:21
[INFO] [stdout]     |
[INFO] [stdout] 157 |                     self.prev_a.insert(next_a);
[INFO] [stdout]     |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: if you intended to set a value, consider assignment instead
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 157 |                     let _ = self.prev_a.insert(next_a);
[INFO] [stdout]     |                     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `Option::<T>::insert` that must be used
[INFO] [stdout]    --> src/set/ops/intersection.rs:165:21
[INFO] [stdout]     |
[INFO] [stdout] 165 |                     self.prev_b.insert(next_b);
[INFO] [stdout]     |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: if you intended to set a value, consider assignment instead
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 165 |                     let _ = self.prev_b.insert(next_b);
[INFO] [stdout]     |                     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `Option::<T>::insert` that must be used
[INFO] [stdout]    --> src/set/ops/intersection.rs:178:21
[INFO] [stdout]     |
[INFO] [stdout] 178 |                     self.prev_a.insert(next_a);
[INFO] [stdout]     |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: if you intended to set a value, consider assignment instead
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 178 |                     let _ = self.prev_a.insert(next_a);
[INFO] [stdout]     |                     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `Option::<T>::insert` that must be used
[INFO] [stdout]    --> src/set/ops/symmetric_difference.rs:128:17
[INFO] [stdout]     |
[INFO] [stdout] 128 |                 self.prev_b.insert(next_b);
[INFO] [stdout]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: if you intended to set a value, consider assignment instead
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 128 |                 let _ = self.prev_b.insert(next_b);
[INFO] [stdout]     |                 +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `Option::<T>::insert` that must be used
[INFO] [stdout]    --> src/set/ops/symmetric_difference.rs:134:17
[INFO] [stdout]     |
[INFO] [stdout] 134 |                 self.prev_a.insert(next_a);
[INFO] [stdout]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: if you intended to set a value, consider assignment instead
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 134 |                 let _ = self.prev_a.insert(next_a);
[INFO] [stdout]     |                 +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `Option::<T>::insert` that must be used
[INFO] [stdout]    --> src/set/ops/symmetric_difference.rs:150:21
[INFO] [stdout]     |
[INFO] [stdout] 150 |                     self.prev_b.insert(next_b);
[INFO] [stdout]     |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: if you intended to set a value, consider assignment instead
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 150 |                     let _ = self.prev_b.insert(next_b);
[INFO] [stdout]     |                     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `Option::<T>::insert` that must be used
[INFO] [stdout]    --> src/set/ops/symmetric_difference.rs:165:21
[INFO] [stdout]     |
[INFO] [stdout] 165 | /                     self.prev_a.insert(Segment {
[INFO] [stdout] 166 | |                         start: next_b.borrow_bound_after().unwrap(),
[INFO] [stdout] 167 | |                         end: next_a.end,
[INFO] [stdout] 168 | |                     });
[INFO] [stdout]     | |______________________^
[INFO] [stdout]     |
[INFO] [stdout]     = note: if you intended to set a value, consider assignment instead
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 165 |                     let _ = self.prev_a.insert(Segment {
[INFO] [stdout]     |                     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `Option::<T>::insert` that must be used
[INFO] [stdout]    --> src/set/ops/symmetric_difference.rs:220:21
[INFO] [stdout]     |
[INFO] [stdout] 220 | /                     self.prev_b.insert(Segment {
[INFO] [stdout] 221 | |                         start: next_a.borrow_bound_after().unwrap(),
[INFO] [stdout] 222 | |                         end: next_b.end,
[INFO] [stdout] 223 | |                     });
[INFO] [stdout]     | |______________________^
[INFO] [stdout]     |
[INFO] [stdout]     = note: if you intended to set a value, consider assignment instead
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 220 |                     let _ = self.prev_b.insert(Segment {
[INFO] [stdout]     |                     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `Option::<T>::insert` that must be used
[INFO] [stdout]    --> src/set/ops/symmetric_difference.rs:245:21
[INFO] [stdout]     |
[INFO] [stdout] 245 |                     self.prev_a.insert(next_a);
[INFO] [stdout]     |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: if you intended to set a value, consider assignment instead
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 245 |                     let _ = self.prev_a.insert(next_a);
[INFO] [stdout]     |                     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `Option::<T>::insert` that must be used
[INFO] [stdout]   --> src/set/ops/union.rs:98:13
[INFO] [stdout]    |
[INFO] [stdout] 98 |             self.prev_b.insert(next_b);
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: if you intended to set a value, consider assignment instead
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 98 |             let _ = self.prev_b.insert(next_b);
[INFO] [stdout]    |             +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `Option::<T>::insert` that must be used
[INFO] [stdout]    --> src/set/ops/union.rs:104:13
[INFO] [stdout]     |
[INFO] [stdout] 104 |             self.prev_a.insert(next_a);
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: if you intended to set a value, consider assignment instead
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 104 |             let _ = self.prev_a.insert(next_a);
[INFO] [stdout]     |             +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `Option::<T>::insert` that must be used
[INFO] [stdout]    --> src/set/ops/union.rs:126:21
[INFO] [stdout]     |
[INFO] [stdout] 126 |                     self.prev_a.insert(r);
[INFO] [stdout]     |                     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: if you intended to set a value, consider assignment instead
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 126 |                     let _ = self.prev_a.insert(r);
[INFO] [stdout]     |                     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `Option::<T>::insert` that must be used
[INFO] [stdout]    --> src/set/ops/union.rs:142:21
[INFO] [stdout]     |
[INFO] [stdout] 142 |                     self.prev_b.insert(r);
[INFO] [stdout]     |                     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: if you intended to set a value, consider assignment instead
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 142 |                     let _ = self.prev_b.insert(r);
[INFO] [stdout]     |                     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 26 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "fb621108bd9facbb97d464674d9155a77f2f646ed1853ded7af881df78ad12c1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fb621108bd9facbb97d464674d9155a77f2f646ed1853ded7af881df78ad12c1", kill_on_drop: false }`
[INFO] [stdout] fb621108bd9facbb97d464674d9155a77f2f646ed1853ded7af881df78ad12c1