[INFO] fetching crate single-instance 0.3.1...
[INFO] testing single-instance-0.3.1 against 1.55.0 for beta-1.56-1
[INFO] extracting crate single-instance 0.3.1 into /workspace/builds/worker-72/source
[INFO] validating manifest of crates.io crate single-instance 0.3.1 on toolchain 1.55.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate single-instance 0.3.1
[INFO] finished tweaking crates.io crate single-instance 0.3.1
[INFO] tweaked toml for crates.io crate single-instance 0.3.1 written to /workspace/builds/worker-72/source/Cargo.toml
[INFO] crate crates.io crate single-instance 0.3.1 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded cc v1.0.37
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-72/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-72/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 0cbf08f33fafea3a47f885fa60dd1357000a45a9c8da7e2c01f718d8827fded5
[INFO] running `Command { std: "docker" "start" "-a" "0cbf08f33fafea3a47f885fa60dd1357000a45a9c8da7e2c01f718d8827fded5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "0cbf08f33fafea3a47f885fa60dd1357000a45a9c8da7e2c01f718d8827fded5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0cbf08f33fafea3a47f885fa60dd1357000a45a9c8da7e2c01f718d8827fded5", kill_on_drop: false }`
[INFO] [stdout] 0cbf08f33fafea3a47f885fa60dd1357000a45a9c8da7e2c01f718d8827fded5
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-72/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-72/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=warn" "-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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 915a1fb4a1da917b3d6b253e776a4efe3de792ea0fd57e00376e3049b623544d
[INFO] running `Command { std: "docker" "start" "-a" "915a1fb4a1da917b3d6b253e776a4efe3de792ea0fd57e00376e3049b623544d", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.24
[INFO] [stderr]    Compiling unicode-xid v0.2.1
[INFO] [stderr]    Compiling syn v1.0.60
[INFO] [stderr]    Compiling libc v0.2.86
[INFO] [stderr]    Compiling bitflags v1.2.1
[INFO] [stderr]    Compiling widestring v0.4.3
[INFO] [stderr]    Compiling nix v0.19.1
[INFO] [stderr]    Compiling quote v1.0.9
[INFO] [stderr]    Compiling thiserror-impl v1.0.23
[INFO] [stderr]    Compiling thiserror v1.0.23
[INFO] [stderr]    Compiling single-instance v0.3.1 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 31.92s
[INFO] running `Command { std: "docker" "inspect" "915a1fb4a1da917b3d6b253e776a4efe3de792ea0fd57e00376e3049b623544d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "915a1fb4a1da917b3d6b253e776a4efe3de792ea0fd57e00376e3049b623544d", kill_on_drop: false }`
[INFO] [stdout] 915a1fb4a1da917b3d6b253e776a4efe3de792ea0fd57e00376e3049b623544d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-72/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-72/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=warn" "-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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 57e109ec85f66bc288fdd3b4696b9633eeb0cd95828363d7409897ffa8256f61
[INFO] running `Command { std: "docker" "start" "-a" "57e109ec85f66bc288fdd3b4696b9633eeb0cd95828363d7409897ffa8256f61", kill_on_drop: false }`
[INFO] [stderr]    Compiling single-instance v0.3.1 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.86s
[INFO] running `Command { std: "docker" "inspect" "57e109ec85f66bc288fdd3b4696b9633eeb0cd95828363d7409897ffa8256f61", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "57e109ec85f66bc288fdd3b4696b9633eeb0cd95828363d7409897ffa8256f61", kill_on_drop: false }`
[INFO] [stdout] 57e109ec85f66bc288fdd3b4696b9633eeb0cd95828363d7409897ffa8256f61
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-72/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-72/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=warn" "-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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] ac82d8dee0023b4a92d14f207bd2fac66847e5366855498d5a5133603935dd71
[INFO] running `Command { std: "docker" "start" "-a" "ac82d8dee0023b4a92d14f207bd2fac66847e5366855498d5a5133603935dd71", kill_on_drop: false }`
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.03s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/single_instance-e3539ef01866a143)
[INFO] [stdout] 
[INFO] [stdout] running 1 test
[INFO] [stdout] test test_single_instance ... 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] [stderr]    Doc-tests single-instance
[INFO] [stdout] 
[INFO] [stdout] running 1 test
[INFO] [stdout] test src/lib.rs - (line 11) ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.53s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "ac82d8dee0023b4a92d14f207bd2fac66847e5366855498d5a5133603935dd71", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ac82d8dee0023b4a92d14f207bd2fac66847e5366855498d5a5133603935dd71", kill_on_drop: false }`
[INFO] [stdout] ac82d8dee0023b4a92d14f207bd2fac66847e5366855498d5a5133603935dd71