[INFO] cloning repository https://github.com/natto1784/singh3
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/natto1784/singh3" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fnatto1784%2Fsingh3", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fnatto1784%2Fsingh3'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 5779f54f2db43ee8d49bc9919ac8f3cfd2799188
[INFO] testing natto1784/singh3 against master#10dccdc7fcbdc64ee9efe2c1ed975ab8c1d61287 for pr-94775
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fnatto1784%2Fsingh3" "/workspace/builds/worker-19/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-19/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/natto1784/singh3 on toolchain 10dccdc7fcbdc64ee9efe2c1ed975ab8c1d61287
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+10dccdc7fcbdc64ee9efe2c1ed975ab8c1d61287" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/natto1784/singh3
[INFO] finished tweaking git repo https://github.com/natto1784/singh3
[INFO] tweaked toml for git repo https://github.com/natto1784/singh3 written to /workspace/builds/worker-19/source/Cargo.toml
[INFO] crate git repo https://github.com/natto1784/singh3 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+10dccdc7fcbdc64ee9efe2c1ed975ab8c1d61287" "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-19/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-19/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@sha256:1ede1414886370302e694df474b9877c02906499f04c196936ce0973d30c5eaa" "/opt/rustwide/cargo-home/bin/cargo" "+10dccdc7fcbdc64ee9efe2c1ed975ab8c1d61287" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 1ccd92f5670fc580d91a12187fadf5c2776e011547f04fe6c7e99e887bf84893
[INFO] running `Command { std: "docker" "start" "-a" "1ccd92f5670fc580d91a12187fadf5c2776e011547f04fe6c7e99e887bf84893", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "1ccd92f5670fc580d91a12187fadf5c2776e011547f04fe6c7e99e887bf84893", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1ccd92f5670fc580d91a12187fadf5c2776e011547f04fe6c7e99e887bf84893", kill_on_drop: false }`
[INFO] [stdout] 1ccd92f5670fc580d91a12187fadf5c2776e011547f04fe6c7e99e887bf84893
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-19/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-19/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@sha256:1ede1414886370302e694df474b9877c02906499f04c196936ce0973d30c5eaa" "/opt/rustwide/cargo-home/bin/cargo" "+10dccdc7fcbdc64ee9efe2c1ed975ab8c1d61287" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 19ad663dc886f1189ed4f7e7c2e7324a1100d734d22aa3a7c74404d4d51db11d
[INFO] running `Command { std: "docker" "start" "-a" "19ad663dc886f1189ed4f7e7c2e7324a1100d734d22aa3a7c74404d4d51db11d", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling libc v0.2.97
[INFO] [stderr]    Compiling proc-macro2 v1.0.27
[INFO] [stderr]    Compiling syn v1.0.73
[INFO] [stderr]    Compiling version_check v0.9.3
[INFO] [stderr]    Compiling memchr v2.4.0
[INFO] [stderr]    Compiling typenum v1.13.0
[INFO] [stderr]    Compiling bytes v1.0.1
[INFO] [stderr]    Compiling pin-project-lite v0.2.7
[INFO] [stderr]    Compiling futures-core v0.3.15
[INFO] [stderr]    Compiling cc v1.0.68
[INFO] [stderr]    Compiling matches v0.1.8
[INFO] [stderr]    Compiling futures-task v0.3.15
[INFO] [stderr]    Compiling futures-channel v0.3.15
[INFO] [stderr]    Compiling proc-macro-nested v0.1.7
[INFO] [stderr]    Compiling futures-sink v0.3.15
[INFO] [stderr]    Compiling itoa v0.4.7
[INFO] [stderr]    Compiling spin v0.5.2
[INFO] [stderr]    Compiling futures-io v0.3.15
[INFO] [stderr]    Compiling ppv-lite86 v0.2.10
[INFO] [stderr]    Compiling slab v0.4.3
[INFO] [stderr]    Compiling httparse v1.4.1
[INFO] [stderr]    Compiling serde_derive v1.0.126
[INFO] [stderr]    Compiling cpufeatures v0.1.5
[INFO] [stderr]    Compiling getrandom v0.1.16
[INFO] [stderr]    Compiling lazy_static v1.4.0
[INFO] [stderr]    Compiling serde v1.0.126
[INFO] [stderr]    Compiling ryu v1.0.5
[INFO] [stderr]    Compiling hashbrown v0.9.1
[INFO] [stderr]    Compiling subtle v2.4.0
[INFO] [stderr]    Compiling serde_json v1.0.64
[INFO] [stderr]    Compiling async-trait v0.1.50
[INFO] [stderr]    Compiling encoding_rs v0.8.28
[INFO] [stderr]    Compiling httpdate v1.0.1
[INFO] [stderr]    Compiling bytes v0.5.6
[INFO] [stderr]    Compiling crc32fast v1.2.1
[INFO] [stderr]    Compiling base64 v0.12.3
[INFO] [stderr]    Compiling adler v1.0.2
[INFO] [stderr]    Compiling bitflags v1.2.1
[INFO] [stderr]    Compiling siphasher v0.3.5
[INFO] [stderr]    Compiling fallible-iterator v0.2.0
[INFO] [stderr]    Compiling serenity v0.10.10
[INFO] [stderr]    Compiling static_assertions v1.1.0
[INFO] [stderr]    Compiling uwl v0.6.0
[INFO] [stderr]    Compiling typemap_rev v0.1.5
[INFO] [stderr]    Compiling regex-syntax v0.6.25
[INFO] [stderr]    Compiling futures-macro v0.3.15
[INFO] [stderr]    Compiling tokio v1.7.1
[INFO] [stderr]    Compiling futures-util v0.3.15
[INFO] [stderr]    Compiling tinyvec v1.2.0
[INFO] [stderr]    Compiling indexmap v1.6.2
[INFO] [stderr]    Compiling num-traits v0.2.14
[INFO] [stderr]    Compiling num-integer v0.1.44
[INFO] [stderr]    Compiling miniz_oxide v0.4.4
[INFO] [stderr]    Compiling instant v0.1.9
[INFO] [stderr]    Compiling lock_api v0.4.4
[INFO] [stderr]    Compiling want v0.3.0
[INFO] [stderr]    Compiling unicode-bidi v0.3.5
[INFO] [stderr]    Compiling form_urlencoded v1.0.1
[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-1.0.68/src/lib.rs --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --crate-type lib --emit=dep-info,metadata,link -C embed-bitcode=no -C debuginfo=2 -C metadata=91af19ea0f09d712 -C extra-filename=-91af19ea0f09d712 --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" "19ad663dc886f1189ed4f7e7c2e7324a1100d734d22aa3a7c74404d4d51db11d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "19ad663dc886f1189ed4f7e7c2e7324a1100d734d22aa3a7c74404d4d51db11d", kill_on_drop: false }`
[INFO] [stdout] 19ad663dc886f1189ed4f7e7c2e7324a1100d734d22aa3a7c74404d4d51db11d