[INFO] fetching crate mr 0.1.0...
[INFO] testing mr-0.1.0 against 1.55.0 for beta-1.56-1
[INFO] extracting crate mr 0.1.0 into /workspace/builds/worker-40/source
[INFO] validating manifest of crates.io crate mr 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 mr 0.1.0
[INFO] finished tweaking crates.io crate mr 0.1.0
[INFO] tweaked toml for crates.io crate mr 0.1.0 written to /workspace/builds/worker-40/source/Cargo.toml
[INFO] crate crates.io crate mr 0.1.0 already has a lockfile, it will not be regenerated
[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-40/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-40/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] 3f860e63a096b7a8c0aee6e84d1cbf7347d73b233433e9df668e12fa04c99253
[INFO] running `Command { std: "docker" "start" "-a" "3f860e63a096b7a8c0aee6e84d1cbf7347d73b233433e9df668e12fa04c99253", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "3f860e63a096b7a8c0aee6e84d1cbf7347d73b233433e9df668e12fa04c99253", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3f860e63a096b7a8c0aee6e84d1cbf7347d73b233433e9df668e12fa04c99253", kill_on_drop: false }`
[INFO] [stdout] 3f860e63a096b7a8c0aee6e84d1cbf7347d73b233433e9df668e12fa04c99253
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-40/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-40/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] bea210d4bae8b91b4d3b9536b5e1763af359cb969d4f5856fda2ad3dc2a731bd
[INFO] running `Command { std: "docker" "start" "-a" "bea210d4bae8b91b4d3b9536b5e1763af359cb969d4f5856fda2ad3dc2a731bd", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling mr v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.79s
[INFO] running `Command { std: "docker" "inspect" "bea210d4bae8b91b4d3b9536b5e1763af359cb969d4f5856fda2ad3dc2a731bd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bea210d4bae8b91b4d3b9536b5e1763af359cb969d4f5856fda2ad3dc2a731bd", kill_on_drop: false }`
[INFO] [stdout] bea210d4bae8b91b4d3b9536b5e1763af359cb969d4f5856fda2ad3dc2a731bd
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-40/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-40/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] 792da302bb36f27a5d8070048c54cb70d4b8bb4e32e8cfb0ab4ea67f48c5d810
[INFO] running `Command { std: "docker" "start" "-a" "792da302bb36f27a5d8070048c54cb70d4b8bb4e32e8cfb0ab4ea67f48c5d810", kill_on_drop: false }`
[INFO] [stderr]    Compiling mr v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.41s
[INFO] running `Command { std: "docker" "inspect" "792da302bb36f27a5d8070048c54cb70d4b8bb4e32e8cfb0ab4ea67f48c5d810", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "792da302bb36f27a5d8070048c54cb70d4b8bb4e32e8cfb0ab4ea67f48c5d810", kill_on_drop: false }`
[INFO] [stdout] 792da302bb36f27a5d8070048c54cb70d4b8bb4e32e8cfb0ab4ea67f48c5d810
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-40/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-40/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] 934202c7f7e64ea31ae794fdd16a1a4d6f469ec7a3c601d91d9947e321bddfb5
[INFO] running `Command { std: "docker" "start" "-a" "934202c7f7e64ea31ae794fdd16a1a4d6f469ec7a3c601d91d9947e321bddfb5", kill_on_drop: false }`
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/mr-f8ad2f5b8e71bf9b)
[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" "934202c7f7e64ea31ae794fdd16a1a4d6f469ec7a3c601d91d9947e321bddfb5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "934202c7f7e64ea31ae794fdd16a1a4d6f469ec7a3c601d91d9947e321bddfb5", kill_on_drop: false }`
[INFO] [stdout] 934202c7f7e64ea31ae794fdd16a1a4d6f469ec7a3c601d91d9947e321bddfb5