[INFO] cloning repository https://github.com/notryanb/fractals_rust
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/notryanb/fractals_rust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fnotryanb%2Ffractals_rust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fnotryanb%2Ffractals_rust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 64895ea4134929848e8dac6ade89e8d0ff8d1151
[INFO] checking notryanb/fractals_rust against master#dfd7b8d03fb93d0e03147d28b3be6d93260fa94d for pr-87050
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fnotryanb%2Ffractals_rust" "/workspace/builds/worker-6/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/notryanb/fractals_rust on toolchain dfd7b8d03fb93d0e03147d28b3be6d93260fa94d
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+dfd7b8d03fb93d0e03147d28b3be6d93260fa94d" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/notryanb/fractals_rust
[INFO] finished tweaking git repo https://github.com/notryanb/fractals_rust
[INFO] tweaked toml for git repo https://github.com/notryanb/fractals_rust written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] crate git repo https://github.com/notryanb/fractals_rust already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+dfd7b8d03fb93d0e03147d28b3be6d93260fa94d" "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-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+dfd7b8d03fb93d0e03147d28b3be6d93260fa94d" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] d1c38ed8e9fd4fa249d98b1fd1a56bef00ff64a2d1d92c66e63101e9635d51e9
[INFO] running `Command { std: "docker" "start" "-a" "d1c38ed8e9fd4fa249d98b1fd1a56bef00ff64a2d1d92c66e63101e9635d51e9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d1c38ed8e9fd4fa249d98b1fd1a56bef00ff64a2d1d92c66e63101e9635d51e9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d1c38ed8e9fd4fa249d98b1fd1a56bef00ff64a2d1d92c66e63101e9635d51e9", kill_on_drop: false }`
[INFO] [stdout] d1c38ed8e9fd4fa249d98b1fd1a56bef00ff64a2d1d92c66e63101e9635d51e9
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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=forbid" "-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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+dfd7b8d03fb93d0e03147d28b3be6d93260fa94d" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 0642ed982d7e50b86ed95272770e1b92932310e2dabc4bb663784bb81f21f9b4
[INFO] running `Command { std: "docker" "start" "-a" "0642ed982d7e50b86ed95272770e1b92932310e2dabc4bb663784bb81f21f9b4", kill_on_drop: false }`
[INFO] [stderr]     Checking libc v0.2.17
[INFO] [stderr]     Checking num-traits v0.1.36
[INFO] [stderr]    Compiling gcc v0.3.38
[INFO] [stderr]     Checking rustc-serialize v0.3.19
[INFO] [stderr]     Checking byteorder v0.5.3
[INFO] [stderr]     Checking bitflags v0.7.0
[INFO] [stderr]     Checking color_quant v1.0.0
[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-0.3.19/src/serialize.rs:147:45
[INFO] [stdout]     |
[INFO] [stdout] 147 | ...                   &f_name: &str,
[INFO] [stdout]     |                       ^^^^^^^ pattern not allowed in function without body
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking gif v0.9.0
[INFO] [stderr]     Checking rand v0.3.14
[INFO] [stderr]     Checking num_cpus v1.1.0
[INFO] [stderr]     Checking num-integer v0.1.32
[INFO] [stderr]    Compiling miniz-sys v0.1.7
[INFO] [stderr]     Checking num-iter v0.1.32
[INFO] [stderr]     Checking deque v0.3.1
[INFO] [stderr]     Checking num v0.1.36
[INFO] [stderr]     Checking enum_primitive v0.1.0
[INFO] [stderr]     Checking rayon v0.4.3
[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`
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "0642ed982d7e50b86ed95272770e1b92932310e2dabc4bb663784bb81f21f9b4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0642ed982d7e50b86ed95272770e1b92932310e2dabc4bb663784bb81f21f9b4", kill_on_drop: false }`
[INFO] [stdout] 0642ed982d7e50b86ed95272770e1b92932310e2dabc4bb663784bb81f21f9b4