[INFO] cloning repository https://github.com/prewk/img_diff
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/prewk/img_diff" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fprewk%2Fimg_diff", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fprewk%2Fimg_diff'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] a97fe31a8d313dca2961a9a1d48496d6248262db
[INFO] checking prewk/img_diff against try#b20a093d9fb1ffaa04ae9852cb034864a992bafd for pr-85073
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fprewk%2Fimg_diff" "/workspace/builds/worker-7/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/prewk/img_diff on toolchain b20a093d9fb1ffaa04ae9852cb034864a992bafd
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+b20a093d9fb1ffaa04ae9852cb034864a992bafd" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/prewk/img_diff
[INFO] finished tweaking git repo https://github.com/prewk/img_diff
[INFO] tweaked toml for git repo https://github.com/prewk/img_diff written to /workspace/builds/worker-7/source/Cargo.toml
[INFO] crate git repo https://github.com/prewk/img_diff already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+b20a093d9fb1ffaa04ae9852cb034864a992bafd" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded jpeg-decoder v0.1.4
[INFO] [stderr]   Downloaded png v0.5.1
[INFO] [stderr]   Downloaded rayon v0.3.1
[INFO] [stderr]   Downloaded image v0.10.0
[INFO] [stderr]   Downloaded serde v0.7.10
[INFO] [stderr]   Downloaded euclid v0.6.8
[INFO] [stderr]   Downloaded heapsize v0.3.6
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+b20a093d9fb1ffaa04ae9852cb034864a992bafd" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 0836b743dd7d2055146caa95d0fcc3f4596fe2e0cf6c9a743e6454d884d4f099
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "0836b743dd7d2055146caa95d0fcc3f4596fe2e0cf6c9a743e6454d884d4f099", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "0836b743dd7d2055146caa95d0fcc3f4596fe2e0cf6c9a743e6454d884d4f099", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0836b743dd7d2055146caa95d0fcc3f4596fe2e0cf6c9a743e6454d884d4f099", kill_on_drop: false }`
[INFO] [stdout] 0836b743dd7d2055146caa95d0fcc3f4596fe2e0cf6c9a743e6454d884d4f099
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+b20a093d9fb1ffaa04ae9852cb034864a992bafd" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] c25e30b3beff023a55ac9358f1c7569db2d24d6ea776602ce3fb5c22742f8efc
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "c25e30b3beff023a55ac9358f1c7569db2d24d6ea776602ce3fb5c22742f8efc", kill_on_drop: false }`
[INFO] [stderr]     Checking libc v0.2.12
[INFO] [stderr]     Checking rustc-serialize v0.3.19
[INFO] [stderr]    Compiling heapsize v0.3.6
[INFO] [stderr]     Checking serde v0.7.10
[INFO] [stderr]     Checking log v0.3.6
[INFO] [stderr]    Compiling miniz-sys v0.1.7
[INFO] [stderr]     Checking gif v0.8.0
[INFO] [stderr]     Checking kernel32-sys v0.2.2
[INFO] [stderr]     Checking num v0.1.32
[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 enum_primitive v0.1.0
[INFO] [stderr]     Checking rand v0.3.14
[INFO] [stderr]     Checking num_cpus v0.2.12
[INFO] [stderr]     Checking deque v0.3.1
[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" "c25e30b3beff023a55ac9358f1c7569db2d24d6ea776602ce3fb5c22742f8efc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c25e30b3beff023a55ac9358f1c7569db2d24d6ea776602ce3fb5c22742f8efc", kill_on_drop: false }`
[INFO] [stdout] c25e30b3beff023a55ac9358f1c7569db2d24d6ea776602ce3fb5c22742f8efc