[INFO] cloning repository https://github.com/dedmons/mandelbrot
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/dedmons/mandelbrot" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdedmons%2Fmandelbrot", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdedmons%2Fmandelbrot'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 226419bdeb7c70c3b98630d6627b111a02a2a5ff
[INFO] checking dedmons/mandelbrot against try#07fecb9cf34c4979a772ba38c99d6d9144768413 for pr-87710
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdedmons%2Fmandelbrot" "/workspace/builds/worker-15/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-15/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/dedmons/mandelbrot on toolchain 07fecb9cf34c4979a772ba38c99d6d9144768413
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+07fecb9cf34c4979a772ba38c99d6d9144768413" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/dedmons/mandelbrot
[INFO] finished tweaking git repo https://github.com/dedmons/mandelbrot
[INFO] tweaked toml for git repo https://github.com/dedmons/mandelbrot written to /workspace/builds/worker-15/source/Cargo.toml
[INFO] crate git repo https://github.com/dedmons/mandelbrot already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+07fecb9cf34c4979a772ba38c99d6d9144768413" "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-15/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-15/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" "+07fecb9cf34c4979a772ba38c99d6d9144768413" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] a2dcdac7b21c365218f52eb13c9f244bd99e710f83422e7f75e811e1e7a748d6
[INFO] running `Command { std: "docker" "start" "-a" "a2dcdac7b21c365218f52eb13c9f244bd99e710f83422e7f75e811e1e7a748d6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a2dcdac7b21c365218f52eb13c9f244bd99e710f83422e7f75e811e1e7a748d6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a2dcdac7b21c365218f52eb13c9f244bd99e710f83422e7f75e811e1e7a748d6", kill_on_drop: false }`
[INFO] [stdout] a2dcdac7b21c365218f52eb13c9f244bd99e710f83422e7f75e811e1e7a748d6
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-15/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-15/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" "+07fecb9cf34c4979a772ba38c99d6d9144768413" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] ad178dec4f80b0919c8ae3c89780a093e4f804f4fd9badf88dfd40a6ac491acf
[INFO] running `Command { std: "docker" "start" "-a" "ad178dec4f80b0919c8ae3c89780a093e4f804f4fd9badf88dfd40a6ac491acf", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Checking winapi v0.2.2
[INFO] [stderr]     Checking libc v0.1.10
[INFO] [stderr]     Checking rustc-serialize v0.3.16
[INFO] [stderr]     Checking lzw v0.8.0
[INFO] [stderr]     Checking color_quant v1.0.0
[INFO] [stderr]     Checking glob v0.2.10
[INFO] [stderr]     Checking strsim v0.4.0
[INFO] [stderr]     Checking ansi_term v0.6.3
[INFO] [stderr]     Checking byteorder v0.3.11
[INFO] [stderr]     Checking threadpool v0.1.4
[INFO] [stderr]    Compiling advapi32-sys v0.1.2
[INFO] [stderr]    Compiling kernel32-sys v0.1.4
[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-0.3.16/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] [stderr]     Checking gif v0.5.0
[INFO] [stderr]     Checking clap v1.2.3
[INFO] [stderr]     Checking num_cpus v0.2.6
[INFO] [stderr]     Checking time v0.1.32
[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" "ad178dec4f80b0919c8ae3c89780a093e4f804f4fd9badf88dfd40a6ac491acf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ad178dec4f80b0919c8ae3c89780a093e4f804f4fd9badf88dfd40a6ac491acf", kill_on_drop: false }`
[INFO] [stdout] ad178dec4f80b0919c8ae3c89780a093e4f804f4fd9badf88dfd40a6ac491acf