[INFO] fetching crate interfacer 0.0.2...
[INFO] testing interfacer-0.0.2 against 1.55.0 for beta-1.56-1
[INFO] extracting crate interfacer 0.0.2 into /workspace/builds/worker-27/source
[INFO] validating manifest of crates.io crate interfacer 0.0.2 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 interfacer 0.0.2
[INFO] finished tweaking crates.io crate interfacer 0.0.2
[INFO] tweaked toml for crates.io crate interfacer 0.0.2 written to /workspace/builds/worker-27/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] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-27/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-27/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] ea904e7c21094bc3e7a7d2e4219ba04d2fe9268f591a977aab92137025d0985a
[INFO] running `Command { std: "docker" "start" "-a" "ea904e7c21094bc3e7a7d2e4219ba04d2fe9268f591a977aab92137025d0985a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ea904e7c21094bc3e7a7d2e4219ba04d2fe9268f591a977aab92137025d0985a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ea904e7c21094bc3e7a7d2e4219ba04d2fe9268f591a977aab92137025d0985a", kill_on_drop: false }`
[INFO] [stdout] ea904e7c21094bc3e7a7d2e4219ba04d2fe9268f591a977aab92137025d0985a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-27/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-27/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] 40ffef6f6cc1e2cc52e5bb940e4b212e1cf99375cbb7eeb03502603aadb37c6e
[INFO] running `Command { std: "docker" "start" "-a" "40ffef6f6cc1e2cc52e5bb940e4b212e1cf99375cbb7eeb03502603aadb37c6e", kill_on_drop: false }`
[INFO] [stderr]    Compiling interfacer v0.0.2 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.29s
[INFO] running `Command { std: "docker" "inspect" "40ffef6f6cc1e2cc52e5bb940e4b212e1cf99375cbb7eeb03502603aadb37c6e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "40ffef6f6cc1e2cc52e5bb940e4b212e1cf99375cbb7eeb03502603aadb37c6e", kill_on_drop: false }`
[INFO] [stdout] 40ffef6f6cc1e2cc52e5bb940e4b212e1cf99375cbb7eeb03502603aadb37c6e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-27/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-27/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] adfbb39665e98cf39f617c5342ecc8ca1273cf549f116483d3b476f1d9915957
[INFO] running `Command { std: "docker" "start" "-a" "adfbb39665e98cf39f617c5342ecc8ca1273cf549f116483d3b476f1d9915957", kill_on_drop: false }`
[INFO] [stderr]    Compiling interfacer v0.0.2 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.60s
[INFO] running `Command { std: "docker" "inspect" "adfbb39665e98cf39f617c5342ecc8ca1273cf549f116483d3b476f1d9915957", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "adfbb39665e98cf39f617c5342ecc8ca1273cf549f116483d3b476f1d9915957", kill_on_drop: false }`
[INFO] [stdout] adfbb39665e98cf39f617c5342ecc8ca1273cf549f116483d3b476f1d9915957
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-27/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-27/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] 1fb944467cddd1c79729f7fc77bbcc205dd3b7b356e1f684d6be911f03d36b68
[INFO] running `Command { std: "docker" "start" "-a" "1fb944467cddd1c79729f7fc77bbcc205dd3b7b356e1f684d6be911f03d36b68", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.38s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/interfacer-eb3b3d2adae38fab)
[INFO] [stdout] 
[INFO] [stdout] running 1 test
[INFO] [stdout] test tests::it_works ... 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 interfacer
[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" "1fb944467cddd1c79729f7fc77bbcc205dd3b7b356e1f684d6be911f03d36b68", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1fb944467cddd1c79729f7fc77bbcc205dd3b7b356e1f684d6be911f03d36b68", kill_on_drop: false }`
[INFO] [stdout] 1fb944467cddd1c79729f7fc77bbcc205dd3b7b356e1f684d6be911f03d36b68