[INFO] cloning repository https://github.com/trbarrett/mazes-for-programmers
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/trbarrett/mazes-for-programmers" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftrbarrett%2Fmazes-for-programmers", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftrbarrett%2Fmazes-for-programmers'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 75d0f290447de227d1645e6267dce93a6d62859e
[INFO] checking trbarrett/mazes-for-programmers against master#ad0d4190facd509a5c79dce427bb7deb2824046e for pr-92472
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftrbarrett%2Fmazes-for-programmers" "/workspace/builds/worker-74/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-74/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/trbarrett/mazes-for-programmers on toolchain ad0d4190facd509a5c79dce427bb7deb2824046e
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+ad0d4190facd509a5c79dce427bb7deb2824046e" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/trbarrett/mazes-for-programmers
[INFO] finished tweaking git repo https://github.com/trbarrett/mazes-for-programmers
[INFO] tweaked toml for git repo https://github.com/trbarrett/mazes-for-programmers written to /workspace/builds/worker-74/source/Cargo.toml
[INFO] crate git repo https://github.com/trbarrett/mazes-for-programmers already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+ad0d4190facd509a5c79dce427bb7deb2824046e" "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] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded pistoncore-window v0.43.0
[INFO] [stderr]   Downloaded pistoncore-input v0.28.0
[INFO] [stderr]   Downloaded pistoncore-glutin_window v0.61.0
[INFO] [stderr]   Downloaded backtrace v0.3.44
[INFO] [stderr]   Downloaded piston-gfx_texture v0.36.0
[INFO] [stderr]   Downloaded pistoncore-event_loop v0.48.0
[INFO] [stderr]   Downloaded piston v0.48.0
[INFO] [stderr]   Downloaded piston_window v0.98.0
[INFO] [stderr]   Downloaded bitmaps v2.0.0
[INFO] [stderr]   Downloaded sized-chunks v0.5.1
[INFO] [stderr]   Downloaded im v14.2.0
[INFO] [stderr]   Downloaded rpds v0.7.0
[INFO] [stderr]   Downloaded piston2d-gfx_graphics v0.61.0
[INFO] [stderr]   Downloaded piston2d-graphics v0.32.0
[INFO] [stderr]   Downloaded archery v0.3.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-74/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-74/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:a429bb59b7a3b4e7270a4b4c243bb115fc561d8f62ec34ef63a0a36cabf65dfd" "/opt/rustwide/cargo-home/bin/cargo" "+ad0d4190facd509a5c79dce427bb7deb2824046e" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 7fc958909d287e361397a65d24d6f44545fcb2aabd8c93e16c157806cce451e6
[INFO] running `Command { std: "docker" "start" "-a" "7fc958909d287e361397a65d24d6f44545fcb2aabd8c93e16c157806cce451e6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "7fc958909d287e361397a65d24d6f44545fcb2aabd8c93e16c157806cce451e6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7fc958909d287e361397a65d24d6f44545fcb2aabd8c93e16c157806cce451e6", kill_on_drop: false }`
[INFO] [stdout] 7fc958909d287e361397a65d24d6f44545fcb2aabd8c93e16c157806cce451e6
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-74/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-74/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:a429bb59b7a3b4e7270a4b4c243bb115fc561d8f62ec34ef63a0a36cabf65dfd" "/opt/rustwide/cargo-home/bin/cargo" "+ad0d4190facd509a5c79dce427bb7deb2824046e" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 10fe9193ff9643a56d08e665e51609a2d0104c39ab85f62c822132f5437346f6
[INFO] running `Command { std: "docker" "start" "-a" "10fe9193ff9643a56d08e665e51609a2d0104c39ab85f62c822132f5437346f6", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling log v0.4.8
[INFO] [stderr]    Compiling semver-parser v0.7.0
[INFO] [stderr]    Compiling byteorder v1.3.4
[INFO] [stderr]    Compiling xml-rs v0.8.0
[INFO] [stderr]     Checking rand_core v0.4.2
[INFO] [stderr]    Compiling cc v1.0.50
[INFO] [stderr]    Compiling syn v0.15.44
[INFO] [stderr]    Compiling khronos_api v3.1.0
[INFO] [stderr]    Compiling proc-macro2 v1.0.8
[INFO] [stderr]     Checking piston-float v1.0.0
[INFO] [stderr]    Compiling nix v0.14.1
[INFO] [stderr]    Compiling maybe-uninit v2.0.0
[INFO] [stderr]     Checking arrayvec v0.5.1
[INFO] [stderr]     Checking void v1.0.2
[INFO] [stderr]    Compiling syn v1.0.14
[INFO] [stderr]    Compiling khronos_api v2.2.0
[INFO] [stderr]    Compiling rayon-core v1.7.0
[INFO] [stderr]    Compiling serde v1.0.104
[INFO] [stderr]    Compiling num-derive v0.2.5
[INFO] [stderr]    Compiling pkg-config v0.3.17
[INFO] [stderr]     Checking either v1.5.3
[INFO] [stderr]     Checking piston-graphics_api_version v0.2.0
[INFO] [stderr]     Checking stable_deref_trait v1.1.1
[INFO] [stderr]     Checking downcast-rs v1.1.1
[INFO] [stderr]     Checking adler32 v1.0.4
[INFO] [stderr]     Checking xdg v2.2.0
[INFO] [stderr]     Checking color_quant v1.0.1
[INFO] [stderr]     Checking percent-encoding v1.0.1
[INFO] [stderr]     Checking piston-texture v0.6.0
[INFO] [stderr]     Checking scoped_threadpool v0.1.9
[INFO] [stderr]     Checking read_color v1.0.0
[INFO] [stderr]     Checking interpolation v0.2.0
[INFO] [stderr]     Checking static_assertions v0.3.4
[INFO] [stderr]     Checking piston-shaders_graphics2d v0.3.1
[INFO] [stderr]    Compiling proc-macro2 v0.4.30
[INFO] [stderr]    Compiling num-traits v0.2.11
[INFO] [stderr]    Compiling crossbeam-utils v0.7.0
[INFO] [stderr]    Compiling num-integer v0.1.42
[INFO] [stderr]    Compiling crossbeam-epoch v0.8.0
[INFO] [stderr]    Compiling rand_pcg v0.1.2
[INFO] [stderr]    Compiling rand_chacha v0.1.1
[INFO] [stderr]    Compiling rand v0.6.5
[INFO] [stderr]    Compiling num-iter v0.1.40
[INFO] [stderr]    Compiling num-rational v0.2.3
[INFO] [stderr]     Checking walkdir v2.3.1
[INFO] [stderr]    Compiling typenum v1.11.2
[INFO] [stderr]     Checking c2-chacha v0.2.3
[INFO] [stderr]    Compiling im v14.2.0
[INFO] [stderr]    Compiling bitflags v1.2.1
[INFO] [stderr]     Checking num_cpus v1.12.0
[INFO] [stderr]     Checking getrandom v0.1.14
[INFO] [stderr]     Checking memmap v0.7.0
[INFO] [stderr]     Checking shared_library v0.1.9
[INFO] [stderr]     Checking time v0.1.42
[INFO] [stderr]     Checking draw_state v0.8.0
[INFO] [stderr]    Compiling semver v0.9.0
[INFO] [stderr]     Checking rand_core v0.3.1
[INFO] [stderr]     Checking rand_jitter v0.1.4
[INFO] [stderr]     Checking rand_os v0.1.3
[INFO] [stderr]     Checking piston-viewport v1.0.0
[INFO] [stderr]     Checking owning_ref v0.4.0
[INFO] [stderr]     Checking vecmath v1.0.0
[INFO] [stderr]     Checking gif v0.10.3
[INFO] [stderr]     Checking itertools v0.8.2
[INFO] [stderr] error: could not compile `cc`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustc --crate-name cc --edition=2018 /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/cc-1.0.50/src/lib.rs --error-format=json --json=diagnostic-rendered-ansi,future-incompat --crate-type lib --emit=dep-info,metadata,link -C embed-bitcode=no -C debuginfo=2 -C metadata=b02acef3041fd979 -C extra-filename=-b02acef3041fd979 --out-dir /opt/rustwide/target/debug/deps -L dependency=/opt/rustwide/target/debug/deps --cap-lints allow --cap-lints=forbid` (signal: 9, SIGKILL: kill)
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "10fe9193ff9643a56d08e665e51609a2d0104c39ab85f62c822132f5437346f6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "10fe9193ff9643a56d08e665e51609a2d0104c39ab85f62c822132f5437346f6", kill_on_drop: false }`
[INFO] [stdout] 10fe9193ff9643a56d08e665e51609a2d0104c39ab85f62c822132f5437346f6