[INFO] fetching crate sem_safe 0.2.1...
[INFO] building sem_safe-0.2.1 against try#4987e9d4227139400384ab59296ffee3b0fb1183 for pr-146237-2
[INFO] extracting crate sem_safe 0.2.1 into /workspace/builds/worker-5-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-5-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate sem_safe 0.2.1 on toolchain 4987e9d4227139400384ab59296ffee3b0fb1183
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+4987e9d4227139400384ab59296ffee3b0fb1183" "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" "+4987e9d4227139400384ab59296ffee3b0fb1183" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+4987e9d4227139400384ab59296ffee3b0fb1183" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] d09920215afa8edc5df40b66f3f085038f2f69830f4eccb3823cc2134a358362
[INFO] running `Command { std: "docker" "start" "-a" "d09920215afa8edc5df40b66f3f085038f2f69830f4eccb3823cc2134a358362", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d09920215afa8edc5df40b66f3f085038f2f69830f4eccb3823cc2134a358362", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d09920215afa8edc5df40b66f3f085038f2f69830f4eccb3823cc2134a358362", kill_on_drop: false }`
[INFO] [stdout] d09920215afa8edc5df40b66f3f085038f2f69830f4eccb3823cc2134a358362
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+4987e9d4227139400384ab59296ffee3b0fb1183" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 3648380985c76a8f918528019aecd0af107a2d0245cfa4fba456d9beae66f6bd
[INFO] running `Command { std: "docker" "start" "-a" "3648380985c76a8f918528019aecd0af107a2d0245cfa4fba456d9beae66f6bd", kill_on_drop: false }`
[INFO] [stderr]    Compiling getrandom v0.2.15
[INFO] [stderr]    Compiling errno v0.3.11
[INFO] [stderr]    Compiling base64 v0.22.1
[INFO] [stderr]    Compiling sem_safe v0.2.1 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.63s
[INFO] running `Command { std: "docker" "inspect" "3648380985c76a8f918528019aecd0af107a2d0245cfa4fba456d9beae66f6bd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3648380985c76a8f918528019aecd0af107a2d0245cfa4fba456d9beae66f6bd", kill_on_drop: false }`
[INFO] [stdout] 3648380985c76a8f918528019aecd0af107a2d0245cfa4fba456d9beae66f6bd
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+4987e9d4227139400384ab59296ffee3b0fb1183" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 3372cf38c17a5221706aa965d58478c001891331c023062feceff66dceeefe81
[INFO] running `Command { std: "docker" "start" "-a" "3372cf38c17a5221706aa965d58478c001891331c023062feceff66dceeefe81", kill_on_drop: false }`
[INFO] [stderr]    Compiling 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]   --> 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] [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] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 1.25s
[INFO] running `Command { std: "docker" "inspect" "3372cf38c17a5221706aa965d58478c001891331c023062feceff66dceeefe81", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3372cf38c17a5221706aa965d58478c001891331c023062feceff66dceeefe81", kill_on_drop: false }`
[INFO] [stdout] 3372cf38c17a5221706aa965d58478c001891331c023062feceff66dceeefe81