[INFO] fetching crate subsystem-test-helpers 0.0.0...
[INFO] testing subsystem-test-helpers-0.0.0 against 1.55.0 for beta-1.56-1
[INFO] extracting crate subsystem-test-helpers 0.0.0 into /workspace/builds/worker-81/source
[INFO] validating manifest of crates.io crate subsystem-test-helpers 0.0.0 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 subsystem-test-helpers 0.0.0
[INFO] finished tweaking crates.io crate subsystem-test-helpers 0.0.0
[INFO] tweaked toml for crates.io crate subsystem-test-helpers 0.0.0 written to /workspace/builds/worker-81/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] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-81/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-81/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] ecf6bb5640555cb842e6e48b2c1e4088c6ee96240c0a1838906de5f0001d4d1e
[INFO] running `Command { std: "docker" "start" "-a" "ecf6bb5640555cb842e6e48b2c1e4088c6ee96240c0a1838906de5f0001d4d1e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ecf6bb5640555cb842e6e48b2c1e4088c6ee96240c0a1838906de5f0001d4d1e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ecf6bb5640555cb842e6e48b2c1e4088c6ee96240c0a1838906de5f0001d4d1e", kill_on_drop: false }`
[INFO] [stdout] ecf6bb5640555cb842e6e48b2c1e4088c6ee96240c0a1838906de5f0001d4d1e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-81/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-81/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] c408a8b00a1ca330d18a1aae0dff018e25e219f637ab42f45dc185e29705c112
[INFO] running `Command { std: "docker" "start" "-a" "c408a8b00a1ca330d18a1aae0dff018e25e219f637ab42f45dc185e29705c112", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling subsystem-test-helpers v0.0.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.67s
[INFO] running `Command { std: "docker" "inspect" "c408a8b00a1ca330d18a1aae0dff018e25e219f637ab42f45dc185e29705c112", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c408a8b00a1ca330d18a1aae0dff018e25e219f637ab42f45dc185e29705c112", kill_on_drop: false }`
[INFO] [stdout] c408a8b00a1ca330d18a1aae0dff018e25e219f637ab42f45dc185e29705c112
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-81/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-81/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] 3015cedb513fcc99c9adf0b67d2e6007f0d5e6febbdc65ba025d5594017f29b1
[INFO] running `Command { std: "docker" "start" "-a" "3015cedb513fcc99c9adf0b67d2e6007f0d5e6febbdc65ba025d5594017f29b1", kill_on_drop: false }`
[INFO] [stderr]    Compiling subsystem-test-helpers v0.0.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.59s
[INFO] running `Command { std: "docker" "inspect" "3015cedb513fcc99c9adf0b67d2e6007f0d5e6febbdc65ba025d5594017f29b1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3015cedb513fcc99c9adf0b67d2e6007f0d5e6febbdc65ba025d5594017f29b1", kill_on_drop: false }`
[INFO] [stdout] 3015cedb513fcc99c9adf0b67d2e6007f0d5e6febbdc65ba025d5594017f29b1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-81/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-81/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] 52f700dd812f9625b31a65bc8e3d7d0097a24d91c8d4b41f707fe24ce086893f
[INFO] running `Command { std: "docker" "start" "-a" "52f700dd812f9625b31a65bc8e3d7d0097a24d91c8d4b41f707fe24ce086893f", kill_on_drop: false }`
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.05s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/subsystem_test_helpers-a4175bfb3ad22007)
[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 subsystem-test-helpers
[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" "52f700dd812f9625b31a65bc8e3d7d0097a24d91c8d4b41f707fe24ce086893f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "52f700dd812f9625b31a65bc8e3d7d0097a24d91c8d4b41f707fe24ce086893f", kill_on_drop: false }`
[INFO] [stdout] 52f700dd812f9625b31a65bc8e3d7d0097a24d91c8d4b41f707fe24ce086893f