[INFO] fetching crate sem_safe 0.2.1...
[INFO] checking sem_safe-0.2.1 against try#c659ee110de67e82444e4b6c8407c1a9af9c2cf6 for pr-145608-1
[INFO] extracting crate sem_safe 0.2.1 into /workspace/builds/worker-6-tc2/source
[INFO] started tweaking crates.io crate sem_safe 0.2.1
[INFO] removed 0 missing examples
[INFO] removed 0 missing tests
[INFO] finished tweaking crates.io crate sem_safe 0.2.1
[INFO] tweaked toml for crates.io crate sem_safe 0.2.1 written to /workspace/builds/worker-6-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate sem_safe 0.2.1 on toolchain c659ee110de67e82444e4b6c8407c1a9af9c2cf6
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+c659ee110de67e82444e4b6c8407c1a9af9c2cf6" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate sem_safe 0.2.1 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" "+c659ee110de67e82444e4b6c8407c1a9af9c2cf6" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+c659ee110de67e82444e4b6c8407c1a9af9c2cf6" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] f84d80175edece17f20d2f686d50564fc92a0d532a65221cf36b946bf415439a
[INFO] running `Command { std: "docker" "start" "-a" "f84d80175edece17f20d2f686d50564fc92a0d532a65221cf36b946bf415439a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f84d80175edece17f20d2f686d50564fc92a0d532a65221cf36b946bf415439a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f84d80175edece17f20d2f686d50564fc92a0d532a65221cf36b946bf415439a", kill_on_drop: false }`
[INFO] [stdout] f84d80175edece17f20d2f686d50564fc92a0d532a65221cf36b946bf415439a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+c659ee110de67e82444e4b6c8407c1a9af9c2cf6" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 18966bcfe4117d6c49263fe9d2890cb0557623244bed07a2b4fa524d8f781071
[INFO] running `Command { std: "docker" "start" "-a" "18966bcfe4117d6c49263fe9d2890cb0557623244bed07a2b4fa524d8f781071", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.172
[INFO] [stderr]     Checking base64 v0.22.1
[INFO] [stderr]     Checking getrandom v0.2.15
[INFO] [stderr]     Checking errno v0.3.11
[INFO] [stderr]     Checking sem_safe v0.2.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused return value of `array::<impl [T; N]>::map` that must be used
[INFO] [stdout]    --> examples/multi-proc/enabled.rs:101:9
[INFO] [stdout]     |
[INFO] [stdout] 101 | /         [me, o1, o2].map(|NamedSem { sem, .. }| {
[INFO] [stdout] ...   |
[INFO] [stdout] 106 | |         });
[INFO] [stdout]     | |__________^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `-W unused-must-use` implied by `-W unused`
[INFO] [stdout]     = help: to override `-W unused` add `#[allow(unused_must_use)]`
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 101 |         let _ = [me, o1, o2].map(|NamedSem { sem, .. }| {
[INFO] [stdout]     |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `array::<impl [T; N]>::map` that must be used
[INFO] [stdout]   --> tests/usage/named.rs:36:5
[INFO] [stdout]    |
[INFO] [stdout] 36 | /     [&s1, &s2, &s3].map(|sem| {
[INFO] [stdout] 37 | |         let r = sem.sem_ref().try_wait();
[INFO] [stdout] 38 | |         assert!(r.is_err());
[INFO] [stdout] 39 | |         assert_eq!(errno(), libc::EAGAIN);
[INFO] [stdout] 40 | |         assert_eq!(r.map_errno().unwrap_err().kind(), io::ErrorKind::WouldBlock);
[INFO] [stdout] 41 | |     });
[INFO] [stdout]    | |______^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `-W unused-must-use` implied by `-W unused`
[INFO] [stdout]    = help: to override `-W unused` add `#[allow(unused_must_use)]`
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 36 |     let _ = [&s1, &s2, &s3].map(|sem| {
[INFO] [stdout]    |     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 2.49s
[INFO] running `Command { std: "docker" "inspect" "18966bcfe4117d6c49263fe9d2890cb0557623244bed07a2b4fa524d8f781071", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "18966bcfe4117d6c49263fe9d2890cb0557623244bed07a2b4fa524d8f781071", kill_on_drop: false }`
[INFO] [stdout] 18966bcfe4117d6c49263fe9d2890cb0557623244bed07a2b4fa524d8f781071