[INFO] fetching crate mumctl 0.4.0...
[INFO] testing mumctl-0.4.0 against 1.55.0 for beta-1.56-1
[INFO] extracting crate mumctl 0.4.0 into /workspace/builds/worker-4/source
[INFO] validating manifest of crates.io crate mumctl 0.4.0 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 mumctl 0.4.0
[INFO] finished tweaking crates.io crate mumctl 0.4.0
[INFO] tweaked toml for crates.io crate mumctl 0.4.0 written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] crate crates.io crate mumctl 0.4.0 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] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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] 6cba7406cd2dcfb76412b8718377007936edb21cc65bd280ec9e6774f2406885
[INFO] running `Command { std: "docker" "start" "-a" "6cba7406cd2dcfb76412b8718377007936edb21cc65bd280ec9e6774f2406885", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "6cba7406cd2dcfb76412b8718377007936edb21cc65bd280ec9e6774f2406885", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6cba7406cd2dcfb76412b8718377007936edb21cc65bd280ec9e6774f2406885", kill_on_drop: false }`
[INFO] [stdout] 6cba7406cd2dcfb76412b8718377007936edb21cc65bd280ec9e6774f2406885
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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] 81410eaf8a21ab2379cb07e3e224365e7821d465c621dcf131ce1f20e848f58d
[INFO] running `Command { std: "docker" "start" "-a" "81410eaf8a21ab2379cb07e3e224365e7821d465c621dcf131ce1f20e848f58d", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.27
[INFO] [stderr]    Compiling syn v1.0.73
[INFO] [stderr]    Compiling libc v0.2.97
[INFO] [stderr]    Compiling serde_derive v1.0.126
[INFO] [stderr]    Compiling serde v1.0.126
[INFO] [stderr]    Compiling mumctl v0.4.0 (/opt/rustwide/workdir)
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.4
[INFO] [stderr]    Compiling proc-macro-error v1.0.4
[INFO] [stderr]    Compiling heck v0.3.3
[INFO] [stderr]    Compiling fern v0.6.0
[INFO] [stderr]    Compiling quote v1.0.9
[INFO] [stderr]    Compiling atty v0.2.14
[INFO] [stderr]    Compiling time v0.1.43
[INFO] [stderr]    Compiling dirs-sys v0.3.6
[INFO] [stderr]    Compiling clap v2.33.3
[INFO] [stderr]    Compiling colored v2.0.0
[INFO] [stderr]    Compiling dirs v3.0.2
[INFO] [stderr]    Compiling structopt-derive v0.4.14
[INFO] [stderr]    Compiling structopt v0.3.21
[INFO] [stderr]    Compiling chrono v0.4.19
[INFO] [stderr]    Compiling toml v0.5.8
[INFO] [stderr]    Compiling bincode v1.3.3
[INFO] [stderr]    Compiling mumlib v0.4.0
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 37.20s
[INFO] running `Command { std: "docker" "inspect" "81410eaf8a21ab2379cb07e3e224365e7821d465c621dcf131ce1f20e848f58d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "81410eaf8a21ab2379cb07e3e224365e7821d465c621dcf131ce1f20e848f58d", kill_on_drop: false }`
[INFO] [stdout] 81410eaf8a21ab2379cb07e3e224365e7821d465c621dcf131ce1f20e848f58d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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] 73c5ad862af7fc1daf1bb438e6dc52c4a58296ece1a7a38684f4bdc61eb57887
[INFO] running `Command { std: "docker" "start" "-a" "73c5ad862af7fc1daf1bb438e6dc52c4a58296ece1a7a38684f4bdc61eb57887", kill_on_drop: false }`
[INFO] [stderr]    Compiling mumctl v0.4.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.93s
[INFO] running `Command { std: "docker" "inspect" "73c5ad862af7fc1daf1bb438e6dc52c4a58296ece1a7a38684f4bdc61eb57887", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "73c5ad862af7fc1daf1bb438e6dc52c4a58296ece1a7a38684f4bdc61eb57887", kill_on_drop: false }`
[INFO] [stdout] 73c5ad862af7fc1daf1bb438e6dc52c4a58296ece1a7a38684f4bdc61eb57887
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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] 1c3935358b0180b0cfb84bfced1bcc3273b42a5d0e0f46677491d517e9984693
[INFO] running `Command { std: "docker" "start" "-a" "1c3935358b0180b0cfb84bfced1bcc3273b42a5d0e0f46677491d517e9984693", kill_on_drop: false }`
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.04s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/mumctl-f07d075980c76b12)
[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" "1c3935358b0180b0cfb84bfced1bcc3273b42a5d0e0f46677491d517e9984693", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1c3935358b0180b0cfb84bfced1bcc3273b42a5d0e0f46677491d517e9984693", kill_on_drop: false }`
[INFO] [stdout] 1c3935358b0180b0cfb84bfced1bcc3273b42a5d0e0f46677491d517e9984693