[INFO] cloning repository https://github.com/ToferC/silencers
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/ToferC/silencers" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FToferC%2Fsilencers", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FToferC%2Fsilencers'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 600d9e1be43154c19fac0b8ace3d5da4e7865fed
[INFO] testing ToferC/silencers against master#a77da2d454e6caa227a85b16410b95f93495e7e0 for pr-91031
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FToferC%2Fsilencers" "/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/ToferC/silencers on toolchain a77da2d454e6caa227a85b16410b95f93495e7e0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a77da2d454e6caa227a85b16410b95f93495e7e0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/ToferC/silencers
[INFO] finished tweaking git repo https://github.com/ToferC/silencers
[INFO] tweaked toml for git repo https://github.com/ToferC/silencers written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] crate git repo https://github.com/ToferC/silencers already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a77da2d454e6caa227a85b16410b95f93495e7e0" "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 num_cpus v1.11.0
[INFO] [stderr]   Downloaded mint v0.5.3
[INFO] [stderr]   Downloaded memoffset v0.5.2
[INFO] [stderr]   Downloaded gilrs v0.7.2
[INFO] [stderr]   Downloaded wasm-bindgen-shared v0.2.53
[INFO] [stderr]   Downloaded wasm-bindgen-macro-support v0.2.53
[INFO] [stderr]   Downloaded wasm-bindgen-macro v0.2.53
[INFO] [stderr]   Downloaded synstructure v0.12.2
[INFO] [stderr]   Downloaded gilrs-core v0.2.4
[INFO] [stderr]   Downloaded wasm-bindgen-backend v0.2.53
[INFO] [stderr]   Downloaded syn v1.0.7
[INFO] [stderr]   Downloaded zip v0.5.3
[INFO] [stderr]   Downloaded wasm-bindgen v0.2.53
[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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+a77da2d454e6caa227a85b16410b95f93495e7e0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 594784c91821e484497f7acf1e90ecba0538974e74a21a3e04bd087cc71af4c3
[INFO] running `Command { std: "docker" "start" "-a" "594784c91821e484497f7acf1e90ecba0538974e74a21a3e04bd087cc71af4c3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "594784c91821e484497f7acf1e90ecba0538974e74a21a3e04bd087cc71af4c3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "594784c91821e484497f7acf1e90ecba0538974e74a21a3e04bd087cc71af4c3", kill_on_drop: false }`
[INFO] [stdout] 594784c91821e484497f7acf1e90ecba0538974e74a21a3e04bd087cc71af4c3
[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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+a77da2d454e6caa227a85b16410b95f93495e7e0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 5aa9719ad0de235b0a5e82ef731201d5d53a391a056ab2f819d92f1b6d9bc59b
[INFO] running `Command { std: "docker" "start" "-a" "5aa9719ad0de235b0a5e82ef731201d5d53a391a056ab2f819d92f1b6d9bc59b", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.65
[INFO] [stderr]    Compiling cfg-if v0.1.10
[INFO] [stderr]    Compiling autocfg v0.1.7
[INFO] [stderr]    Compiling serde v1.0.102
[INFO] [stderr]    Compiling cc v1.0.47
[INFO] [stderr]    Compiling semver-parser v0.7.0
[INFO] [stderr]    Compiling proc-macro2 v0.4.30
[INFO] [stderr]    Compiling unicode-xid v0.1.0
[INFO] [stderr]    Compiling bitflags v1.2.1
[INFO] [stderr]    Compiling lazy_static v1.4.0
[INFO] [stderr]    Compiling xml-rs v0.8.0
[INFO] [stderr]    Compiling log v0.4.8
[INFO] [stderr]    Compiling byteorder v1.3.2
[INFO] [stderr]    Compiling arrayvec v0.4.12
[INFO] [stderr]    Compiling nodrop v0.1.14
[INFO] [stderr]    Compiling pkg-config v0.3.17
[INFO] [stderr]    Compiling khronos_api v3.1.0
[INFO] [stderr]    Compiling scopeguard v1.0.0
[INFO] [stderr]    Compiling syn v0.15.44
[INFO] [stderr]    Compiling maybe-uninit v2.0.0
[INFO] [stderr]    Compiling rand_core v0.4.2
[INFO] [stderr]    Compiling void v1.0.2
[INFO] [stderr]    Compiling arrayvec v0.5.1
[INFO] [stderr]    Compiling linked-hash-map v0.5.2
[INFO] [stderr]    Compiling proc-macro2 v1.0.6
[INFO] [stderr]    Compiling same-file v1.0.5
[INFO] [stderr]    Compiling nix v0.14.1
[INFO] [stderr]    Compiling getrandom v0.1.13
[INFO] [stderr]    Compiling unicode-xid v0.2.0
[INFO] [stderr]    Compiling ryu v1.0.2
[INFO] [stderr]    Compiling version_check v0.1.5
[INFO] [stderr]    Compiling syn v1.0.7
[INFO] [stderr]    Compiling ppv-lite86 v0.2.6
[INFO] [stderr]    Compiling downcast-rs v1.1.1
[INFO] [stderr]    Compiling rustc-demangle v0.1.16
[INFO] [stderr]    Compiling xdg v2.2.0
[INFO] [stderr]    Compiling typenum v1.11.2
[INFO] [stderr]    Compiling itoa v0.4.4
[INFO] [stderr]    Compiling libm v0.1.4
[INFO] [stderr]    Compiling crc32fast v1.2.0
[INFO] [stderr]    Compiling pulldown-cmark v0.2.0
[INFO] [stderr]    Compiling nix v0.11.1
[INFO] [stderr]    Compiling num-derive v0.2.5
[INFO] [stderr]    Compiling remove_dir_all v0.5.2
[INFO] [stderr]    Compiling adler32 v1.0.4
[INFO] [stderr]    Compiling bytecount v0.4.0
[INFO] [stderr]    Compiling xi-unicode v0.2.0
[INFO] [stderr]    Compiling lzw v0.10.0
[INFO] [stderr]    Compiling glob v0.2.11
[INFO] [stderr]    Compiling percent-encoding v2.1.0
[INFO] [stderr]    Compiling rawpointer v0.2.1
[INFO] [stderr]    Compiling color_quant v1.0.1
[INFO] [stderr]    Compiling mint v0.5.3
[INFO] [stderr]    Compiling uuid v0.7.4
[INFO] [stderr]    Compiling vec_map v0.8.1
[INFO] [stderr]    Compiling claxon v0.4.2
[INFO] [stderr]    Compiling podio v0.1.6
[INFO] [stderr]    Compiling fnv v1.0.6
[INFO] [stderr]    Compiling hound v3.4.0
[INFO] [stderr]    Compiling walkdir v2.2.9
[INFO] [stderr]    Compiling crossbeam-utils v0.6.6
[INFO] [stderr]    Compiling lock_api v0.3.1
[INFO] [stderr]    Compiling matrixmultiply v0.2.3
[INFO] [stderr]    Compiling inflate v0.4.5
[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-1.0.47/src/lib.rs --error-format=json --json=diagnostic-rendered-ansi --crate-type lib --emit=dep-info,metadata,link -C embed-bitcode=no -C debuginfo=2 -C metadata=5152cd6d8409929b -C extra-filename=-5152cd6d8409929b --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" "5aa9719ad0de235b0a5e82ef731201d5d53a391a056ab2f819d92f1b6d9bc59b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5aa9719ad0de235b0a5e82ef731201d5d53a391a056ab2f819d92f1b6d9bc59b", kill_on_drop: false }`
[INFO] [stdout] 5aa9719ad0de235b0a5e82ef731201d5d53a391a056ab2f819d92f1b6d9bc59b