[INFO] cloning repository https://github.com/stoatally/rust-guessing-game
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/stoatally/rust-guessing-game" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fstoatally%2Frust-guessing-game", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fstoatally%2Frust-guessing-game'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 8063c1acdc8f957f4a1024560c2f83e7cf99a776
[INFO] testing stoatally/rust-guessing-game against 1.55.0 for beta-1.56-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fstoatally%2Frust-guessing-game" "/workspace/builds/worker-39/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-39/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/stoatally/rust-guessing-game 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 git repo https://github.com/stoatally/rust-guessing-game
[INFO] finished tweaking git repo https://github.com/stoatally/rust-guessing-game
[INFO] tweaked toml for git repo https://github.com/stoatally/rust-guessing-game written to /workspace/builds/worker-39/source/Cargo.toml
[INFO] crate git repo https://github.com/stoatally/rust-guessing-game 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] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-39/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-39/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] 18e51e3cb5f5dd8172639e578dcbf3d589ea1ee471ec46cb7f5be448130ea9f3
[INFO] running `Command { std: "docker" "start" "-a" "18e51e3cb5f5dd8172639e578dcbf3d589ea1ee471ec46cb7f5be448130ea9f3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "18e51e3cb5f5dd8172639e578dcbf3d589ea1ee471ec46cb7f5be448130ea9f3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "18e51e3cb5f5dd8172639e578dcbf3d589ea1ee471ec46cb7f5be448130ea9f3", kill_on_drop: false }`
[INFO] [stdout] 18e51e3cb5f5dd8172639e578dcbf3d589ea1ee471ec46cb7f5be448130ea9f3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-39/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-39/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] d953f433a958ca6951d023e7c40c70c6d7a0b2e83d1aea5fd22e769d41252dac
[INFO] running `Command { std: "docker" "start" "-a" "d953f433a958ca6951d023e7c40c70c6d7a0b2e83d1aea5fd22e769d41252dac", kill_on_drop: false }`
[INFO] [stderr]    Compiling pkg-config v0.3.8
[INFO] [stderr]    Compiling libc v0.1.12
[INFO] [stderr]    Compiling bitflags v0.3.3
[INFO] [stderr]    Compiling encoding_index_tests v0.1.4
[INFO] [stderr]    Compiling winapi-build v0.1.1
[INFO] [stderr]    Compiling libc v0.2.8
[INFO] [stderr]    Compiling gcc v0.3.9
[INFO] [stderr]    Compiling winapi v0.2.5
[INFO] [stderr]    Compiling cairo-rs v0.0.7
[INFO] [stderr]    Compiling rustc-serialize v0.3.18
[INFO] [stderr]    Compiling c_vec v1.0.12
[INFO] [stderr]    Compiling gdk v0.2.0
[INFO] [stderr]    Compiling num v0.1.31
[INFO] [stderr]    Compiling gtk v0.0.6
[INFO] [stderr]    Compiling matches v0.1.2
[INFO] [stderr]    Compiling bitflags v0.4.0
[INFO] [stderr]    Compiling ascii v0.5.4
[INFO] [stderr]    Compiling vec_map v0.4.0
[INFO] [stderr]    Compiling chunked_transfer v0.3.1
[INFO] [stderr]    Compiling strsim v0.4.0
[INFO] [stderr]    Compiling ansi_term v0.7.2
[INFO] [stdout] error[E0642]: patterns aren't allowed in functions without bodies
[INFO] [stdout]    --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/rustc-serialize-0.3.18/src/serialize.rs:145:45
[INFO] [stdout]     |
[INFO] [stdout] 145 | ...                   &f_name: &str,
[INFO] [stdout]     |                       ^^^^^^^ pattern not allowed in function without body
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0642`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `rustc-serialize` due to 2 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "d953f433a958ca6951d023e7c40c70c6d7a0b2e83d1aea5fd22e769d41252dac", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d953f433a958ca6951d023e7c40c70c6d7a0b2e83d1aea5fd22e769d41252dac", kill_on_drop: false }`
[INFO] [stdout] d953f433a958ca6951d023e7c40c70c6d7a0b2e83d1aea5fd22e769d41252dac