[INFO] fetching crate tower-stack 0.0.0...
[INFO] testing tower-stack-0.0.0 against beta-2022-04-10 for beta-1.61-1
[INFO] extracting crate tower-stack 0.0.0 into /workspace/builds/worker-88/source
[INFO] validating manifest of crates.io crate tower-stack 0.0.0 on toolchain beta-2022-04-10
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-04-10" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate tower-stack 0.0.0
[INFO] finished tweaking crates.io crate tower-stack 0.0.0
[INFO] tweaked toml for crates.io crate tower-stack 0.0.0 written to /workspace/builds/worker-88/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-04-10" "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" "+beta-2022-04-10" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-88/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-88/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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-04-10" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 5b76e758a157888abb2217d72e056acffb45d330248f05db36f65f57e6cd6326
[INFO] running `Command { std: "docker" "start" "-a" "5b76e758a157888abb2217d72e056acffb45d330248f05db36f65f57e6cd6326", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "5b76e758a157888abb2217d72e056acffb45d330248f05db36f65f57e6cd6326", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5b76e758a157888abb2217d72e056acffb45d330248f05db36f65f57e6cd6326", kill_on_drop: false }`
[INFO] [stdout] 5b76e758a157888abb2217d72e056acffb45d330248f05db36f65f57e6cd6326
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-88/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-88/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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-04-10" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 0f4c7c6745b3a31a7990f8ac59d90c91c009c233e980fb48ecd6f3d93a902905
[INFO] running `Command { std: "docker" "start" "-a" "0f4c7c6745b3a31a7990f8ac59d90c91c009c233e980fb48ecd6f3d93a902905", kill_on_drop: false }`
[INFO] [stderr]    Compiling tower-stack v0.0.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.80s
[INFO] running `Command { std: "docker" "inspect" "0f4c7c6745b3a31a7990f8ac59d90c91c009c233e980fb48ecd6f3d93a902905", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0f4c7c6745b3a31a7990f8ac59d90c91c009c233e980fb48ecd6f3d93a902905", kill_on_drop: false }`
[INFO] [stdout] 0f4c7c6745b3a31a7990f8ac59d90c91c009c233e980fb48ecd6f3d93a902905
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-88/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-88/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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-04-10" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 8cf9431141218d3cebcf0e98934fbd9d84e25c43eb5f2a82b6c0c6f348fb4f85
[INFO] running `Command { std: "docker" "start" "-a" "8cf9431141218d3cebcf0e98934fbd9d84e25c43eb5f2a82b6c0c6f348fb4f85", kill_on_drop: false }`
[INFO] [stderr]    Compiling tower-stack v0.0.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.58s
[INFO] [stderr]   Executable unittests src/lib.rs (/opt/rustwide/target/debug/deps/tower_stack-3c5880aa82915f75)
[INFO] running `Command { std: "docker" "inspect" "8cf9431141218d3cebcf0e98934fbd9d84e25c43eb5f2a82b6c0c6f348fb4f85", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8cf9431141218d3cebcf0e98934fbd9d84e25c43eb5f2a82b6c0c6f348fb4f85", kill_on_drop: false }`
[INFO] [stdout] 8cf9431141218d3cebcf0e98934fbd9d84e25c43eb5f2a82b6c0c6f348fb4f85
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-88/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-88/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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-04-10" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 1332433db927c88e710ae2760daa35f3d5ace7cf14654632548488c6849fe072
[INFO] running `Command { std: "docker" "start" "-a" "1332433db927c88e710ae2760daa35f3d5ace7cf14654632548488c6849fe072", kill_on_drop: false }`
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.12s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/tower_stack-3c5880aa82915f75)
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests tower-stack
[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] [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 0.05s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "1332433db927c88e710ae2760daa35f3d5ace7cf14654632548488c6849fe072", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1332433db927c88e710ae2760daa35f3d5ace7cf14654632548488c6849fe072", kill_on_drop: false }`
[INFO] [stdout] 1332433db927c88e710ae2760daa35f3d5ace7cf14654632548488c6849fe072