[INFO] fetching crate singleton-trait 0.4.0...
[INFO] testing singleton-trait-0.4.0 against try#8de4c7234dd9b97c9d76b58671343fdbbc9a433e+target=x86_64-unknown-linux-musl for musl_upgrade_1_2_5_with_libc_patch_0
[INFO] extracting crate singleton-trait 0.4.0 into /workspace/builds/worker-4-tc1/source
[INFO] started tweaking crates.io crate singleton-trait 0.4.0
[INFO] finished tweaking crates.io crate singleton-trait 0.4.0
[INFO] tweaked toml for crates.io crate singleton-trait 0.4.0 written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate singleton-trait 0.4.0 on toolchain 8de4c7234dd9b97c9d76b58671343fdbbc9a433e
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+8de4c7234dd9b97c9d76b58671343fdbbc9a433e" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate singleton-trait 0.4.0 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" "+8de4c7234dd9b97c9d76b58671343fdbbc9a433e" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+8de4c7234dd9b97c9d76b58671343fdbbc9a433e" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 092431becc68c021f82ecfa28bdcf53069c5011c5179591a1d997fb7d0853073
[INFO] running `Command { std: "docker" "start" "-a" "092431becc68c021f82ecfa28bdcf53069c5011c5179591a1d997fb7d0853073", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "092431becc68c021f82ecfa28bdcf53069c5011c5179591a1d997fb7d0853073", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "092431becc68c021f82ecfa28bdcf53069c5011c5179591a1d997fb7d0853073", kill_on_drop: false }`
[INFO] [stdout] 092431becc68c021f82ecfa28bdcf53069c5011c5179591a1d997fb7d0853073
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+8de4c7234dd9b97c9d76b58671343fdbbc9a433e" "build" "--frozen" "--message-format=json" "--target" "x86_64-unknown-linux-musl", kill_on_drop: false }`
[INFO] [stdout] bd3f437cb13f0ac0d61daa86623bd3bd1974f67be9c3435e1beac1beafb636fa
[INFO] running `Command { std: "docker" "start" "-a" "bd3f437cb13f0ac0d61daa86623bd3bd1974f67be9c3435e1beac1beafb636fa", kill_on_drop: false }`
[INFO] [stderr]    Compiling singleton-trait v0.4.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.31s
[INFO] running `Command { std: "docker" "inspect" "bd3f437cb13f0ac0d61daa86623bd3bd1974f67be9c3435e1beac1beafb636fa", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bd3f437cb13f0ac0d61daa86623bd3bd1974f67be9c3435e1beac1beafb636fa", kill_on_drop: false }`
[INFO] [stdout] bd3f437cb13f0ac0d61daa86623bd3bd1974f67be9c3435e1beac1beafb636fa
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+8de4c7234dd9b97c9d76b58671343fdbbc9a433e" "test" "--frozen" "--no-run" "--message-format=json" "--target" "x86_64-unknown-linux-musl", kill_on_drop: false }`
[INFO] [stdout] 59893f05848ff33555ac31dc7ea363cd5e6fc3beacf456d0222c23d4d4634474
[INFO] running `Command { std: "docker" "start" "-a" "59893f05848ff33555ac31dc7ea363cd5e6fc3beacf456d0222c23d4d4634474", kill_on_drop: false }`
[INFO] [stderr]    Compiling singleton-trait v0.4.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: field `1` is never read
[INFO] [stdout]    --> src/lib.rs:448:61
[INFO] [stdout]     |
[INFO] [stdout] 448 |         struct Guard<'a>(PhantomData<fn(&'a ()) -> &'a ()>, &'a NonCopy);
[INFO] [stdout]     |                ----- field in this struct                   ^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: consider removing this field
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.62s
[INFO] running `Command { std: "docker" "inspect" "59893f05848ff33555ac31dc7ea363cd5e6fc3beacf456d0222c23d4d4634474", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "59893f05848ff33555ac31dc7ea363cd5e6fc3beacf456d0222c23d4d4634474", kill_on_drop: false }`
[INFO] [stdout] 59893f05848ff33555ac31dc7ea363cd5e6fc3beacf456d0222c23d4d4634474
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+8de4c7234dd9b97c9d76b58671343fdbbc9a433e" "test" "--frozen" "--target" "x86_64-unknown-linux-musl", kill_on_drop: false }`
[INFO] [stdout] ef257150cf4beb4dd76a7e17aea792ff965f281570a8f66923ef94dd677af4e6
[INFO] running `Command { std: "docker" "start" "-a" "ef257150cf4beb4dd76a7e17aea792ff965f281570a8f66923ef94dd677af4e6", kill_on_drop: false }`
[INFO] [stderr] warning: field `1` is never read
[INFO] [stderr]    --> src/lib.rs:448:61
[INFO] [stderr]     |
[INFO] [stderr] 448 |         struct Guard<'a>(PhantomData<fn(&'a ()) -> &'a ()>, &'a NonCopy);
[INFO] [stderr]     |                ----- field in this struct                   ^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = help: consider removing this field
[INFO] [stderr]     = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: `singleton-trait` (lib test) generated 1 warning
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.04s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/x86_64-unknown-linux-musl/debug/deps/singleton_trait-d0e5e892a1596514)
[INFO] [stdout] 
[INFO] [stdout] running 1 test
[INFO] [stdout] test tests::test_impls ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "ef257150cf4beb4dd76a7e17aea792ff965f281570a8f66923ef94dd677af4e6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ef257150cf4beb4dd76a7e17aea792ff965f281570a8f66923ef94dd677af4e6", kill_on_drop: false }`
[INFO] [stdout] ef257150cf4beb4dd76a7e17aea792ff965f281570a8f66923ef94dd677af4e6