[INFO] fetching crate cow-rc-str 0.1.0...
[INFO] testing cow-rc-str-0.1.0 against 1.55.0 for beta-1.56-1
[INFO] extracting crate cow-rc-str 0.1.0 into /workspace/builds/worker-62/source
[INFO] validating manifest of crates.io crate cow-rc-str 0.1.0 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 cow-rc-str 0.1.0
[INFO] finished tweaking crates.io crate cow-rc-str 0.1.0
[INFO] tweaked toml for crates.io crate cow-rc-str 0.1.0 written to /workspace/builds/worker-62/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[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] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-62/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-62/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] 3563ce4f0ab98c811e238f0438c848d5e7a9db3fd1321816fa75511ea9b504c2
[INFO] running `Command { std: "docker" "start" "-a" "3563ce4f0ab98c811e238f0438c848d5e7a9db3fd1321816fa75511ea9b504c2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "3563ce4f0ab98c811e238f0438c848d5e7a9db3fd1321816fa75511ea9b504c2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3563ce4f0ab98c811e238f0438c848d5e7a9db3fd1321816fa75511ea9b504c2", kill_on_drop: false }`
[INFO] [stdout] 3563ce4f0ab98c811e238f0438c848d5e7a9db3fd1321816fa75511ea9b504c2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-62/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-62/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] e9096e25319a3edd44ed5892614651d7fb1b3c5f4b3167f7224df5e0815d70ff
[INFO] running `Command { std: "docker" "start" "-a" "e9096e25319a3edd44ed5892614651d7fb1b3c5f4b3167f7224df5e0815d70ff", kill_on_drop: false }`
[INFO] [stderr]    Compiling cow-rc-str v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.34s
[INFO] running `Command { std: "docker" "inspect" "e9096e25319a3edd44ed5892614651d7fb1b3c5f4b3167f7224df5e0815d70ff", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e9096e25319a3edd44ed5892614651d7fb1b3c5f4b3167f7224df5e0815d70ff", kill_on_drop: false }`
[INFO] [stdout] e9096e25319a3edd44ed5892614651d7fb1b3c5f4b3167f7224df5e0815d70ff
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-62/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-62/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] a72ea3d81f31bea4e69d9b0f473cd5f195d32a769b8b3fdd13eb7e69f9e20171
[INFO] running `Command { std: "docker" "start" "-a" "a72ea3d81f31bea4e69d9b0f473cd5f195d32a769b8b3fdd13eb7e69f9e20171", kill_on_drop: false }`
[INFO] [stderr]    Compiling cow-rc-str v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.54s
[INFO] running `Command { std: "docker" "inspect" "a72ea3d81f31bea4e69d9b0f473cd5f195d32a769b8b3fdd13eb7e69f9e20171", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a72ea3d81f31bea4e69d9b0f473cd5f195d32a769b8b3fdd13eb7e69f9e20171", kill_on_drop: false }`
[INFO] [stdout] a72ea3d81f31bea4e69d9b0f473cd5f195d32a769b8b3fdd13eb7e69f9e20171
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-62/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-62/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] b7f308319c91ee7293491a1b3bf003d4d8bf76630cd92bdc7434fd0217d6740d
[INFO] running `Command { std: "docker" "start" "-a" "b7f308319c91ee7293491a1b3bf003d4d8bf76630cd92bdc7434fd0217d6740d", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 1.62s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/cow_rc_str-4bd0d9246b441bb4)
[INFO] [stdout] 
[INFO] [stdout] running 1 test
[INFO] [stdout] test tests::test_creation ... 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 cow-rc-str
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "b7f308319c91ee7293491a1b3bf003d4d8bf76630cd92bdc7434fd0217d6740d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b7f308319c91ee7293491a1b3bf003d4d8bf76630cd92bdc7434fd0217d6740d", kill_on_drop: false }`
[INFO] [stdout] b7f308319c91ee7293491a1b3bf003d4d8bf76630cd92bdc7434fd0217d6740d