[INFO] fetching crate corroder 0.1.0...
[INFO] testing corroder-0.1.0 against 1.55.0 for beta-1.56-1
[INFO] extracting crate corroder 0.1.0 into /workspace/builds/worker-4/source
[INFO] validating manifest of crates.io crate corroder 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 corroder 0.1.0
[INFO] finished tweaking crates.io crate corroder 0.1.0
[INFO] tweaked toml for crates.io crate corroder 0.1.0 written to /workspace/builds/worker-4/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] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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] 8f5f35a8a5632f171e51f7154cddac93d0d8a0fb30e17f364cfae9f6b62e94d7
[INFO] running `Command { std: "docker" "start" "-a" "8f5f35a8a5632f171e51f7154cddac93d0d8a0fb30e17f364cfae9f6b62e94d7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "8f5f35a8a5632f171e51f7154cddac93d0d8a0fb30e17f364cfae9f6b62e94d7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8f5f35a8a5632f171e51f7154cddac93d0d8a0fb30e17f364cfae9f6b62e94d7", kill_on_drop: false }`
[INFO] [stdout] 8f5f35a8a5632f171e51f7154cddac93d0d8a0fb30e17f364cfae9f6b62e94d7
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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] 39e57ecb9b2f88be44988ed642b7955e29a408fe71179586770c8ae7333b501d
[INFO] running `Command { std: "docker" "start" "-a" "39e57ecb9b2f88be44988ed642b7955e29a408fe71179586770c8ae7333b501d", kill_on_drop: false }`
[INFO] [stderr]    Compiling assert_approx_eq v0.2.2
[INFO] [stderr]    Compiling assert_matches v1.5.0
[INFO] [stderr]    Compiling assert_ne v0.2.5
[INFO] [stderr]    Compiling corroder v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.34s
[INFO] running `Command { std: "docker" "inspect" "39e57ecb9b2f88be44988ed642b7955e29a408fe71179586770c8ae7333b501d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "39e57ecb9b2f88be44988ed642b7955e29a408fe71179586770c8ae7333b501d", kill_on_drop: false }`
[INFO] [stdout] 39e57ecb9b2f88be44988ed642b7955e29a408fe71179586770c8ae7333b501d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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] 3a68273cff370b2670f192c8a45efff8fc99f85605b941792e68ca02e849a77f
[INFO] running `Command { std: "docker" "start" "-a" "3a68273cff370b2670f192c8a45efff8fc99f85605b941792e68ca02e849a77f", kill_on_drop: false }`
[INFO] [stderr]    Compiling corroder v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.39s
[INFO] running `Command { std: "docker" "inspect" "3a68273cff370b2670f192c8a45efff8fc99f85605b941792e68ca02e849a77f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3a68273cff370b2670f192c8a45efff8fc99f85605b941792e68ca02e849a77f", kill_on_drop: false }`
[INFO] [stdout] 3a68273cff370b2670f192c8a45efff8fc99f85605b941792e68ca02e849a77f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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] f8545f2f51463d07e2ec32a038a79179eaf7379623873bce5d64710c18a4f873
[INFO] running `Command { std: "docker" "start" "-a" "f8545f2f51463d07e2ec32a038a79179eaf7379623873bce5d64710c18a4f873", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.02s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/corroder-e1a5e1192dc12ed6)
[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] [stderr]    Doc-tests corroder
[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" "f8545f2f51463d07e2ec32a038a79179eaf7379623873bce5d64710c18a4f873", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f8545f2f51463d07e2ec32a038a79179eaf7379623873bce5d64710c18a4f873", kill_on_drop: false }`
[INFO] [stdout] f8545f2f51463d07e2ec32a038a79179eaf7379623873bce5d64710c18a4f873