[INFO] fetching crate but 0.0.0...
[INFO] testing but-0.0.0 against beta-2022-02-22 for beta-1.60-1
[INFO] extracting crate but 0.0.0 into /workspace/builds/worker-51/source
[INFO] validating manifest of crates.io crate but 0.0.0 on toolchain beta-2022-02-22
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-02-22" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate but 0.0.0
[INFO] finished tweaking crates.io crate but 0.0.0
[INFO] tweaked toml for crates.io crate but 0.0.0 written to /workspace/builds/worker-51/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-02-22" "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-2022-02-22" "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-51/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-51/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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-02-22" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] d7a7c22ef06b544fa258e5053292dfb92ae3bb43a721d743e473ab47ac0ba379
[INFO] running `Command { std: "docker" "start" "-a" "d7a7c22ef06b544fa258e5053292dfb92ae3bb43a721d743e473ab47ac0ba379", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d7a7c22ef06b544fa258e5053292dfb92ae3bb43a721d743e473ab47ac0ba379", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d7a7c22ef06b544fa258e5053292dfb92ae3bb43a721d743e473ab47ac0ba379", kill_on_drop: false }`
[INFO] [stdout] d7a7c22ef06b544fa258e5053292dfb92ae3bb43a721d743e473ab47ac0ba379
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-51/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-51/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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-02-22" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] d364dfb05c38b27081c622e0a9646ec58a80552c6e74f87d82d15f9cb0449133
[INFO] running `Command { std: "docker" "start" "-a" "d364dfb05c38b27081c622e0a9646ec58a80552c6e74f87d82d15f9cb0449133", kill_on_drop: false }`
[INFO] [stderr]    Compiling but v0.0.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.19s
[INFO] running `Command { std: "docker" "inspect" "d364dfb05c38b27081c622e0a9646ec58a80552c6e74f87d82d15f9cb0449133", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d364dfb05c38b27081c622e0a9646ec58a80552c6e74f87d82d15f9cb0449133", kill_on_drop: false }`
[INFO] [stdout] d364dfb05c38b27081c622e0a9646ec58a80552c6e74f87d82d15f9cb0449133
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-51/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-51/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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-02-22" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] b17757dada54c1a7339f27927836c10d1f9fd3da742b8f3fc1531b23c45bd012
[INFO] running `Command { std: "docker" "start" "-a" "b17757dada54c1a7339f27927836c10d1f9fd3da742b8f3fc1531b23c45bd012", kill_on_drop: false }`
[INFO] [stderr]    Compiling but v0.0.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.61s
[INFO] running `Command { std: "docker" "inspect" "b17757dada54c1a7339f27927836c10d1f9fd3da742b8f3fc1531b23c45bd012", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b17757dada54c1a7339f27927836c10d1f9fd3da742b8f3fc1531b23c45bd012", kill_on_drop: false }`
[INFO] [stdout] b17757dada54c1a7339f27927836c10d1f9fd3da742b8f3fc1531b23c45bd012
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-51/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-51/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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-02-22" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 6b36b30a1b463aa3a9dc596f6ecd649e7524aea3da1a8b4b7662da1ec4bb33cc
[INFO] running `Command { std: "docker" "start" "-a" "6b36b30a1b463aa3a9dc596f6ecd649e7524aea3da1a8b4b7662da1ec4bb33cc", kill_on_drop: false }`
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.02s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/but-68ff61bc1bbaf285)
[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 but
[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" "6b36b30a1b463aa3a9dc596f6ecd649e7524aea3da1a8b4b7662da1ec4bb33cc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6b36b30a1b463aa3a9dc596f6ecd649e7524aea3da1a8b4b7662da1ec4bb33cc", kill_on_drop: false }`
[INFO] [stdout] 6b36b30a1b463aa3a9dc596f6ecd649e7524aea3da1a8b4b7662da1ec4bb33cc