[INFO] cloning repository https://github.com/yangcancai/hello_rust
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/yangcancai/hello_rust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fyangcancai%2Fhello_rust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fyangcancai%2Fhello_rust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 44edeb3f4be65431af2bcc58ff942e2fe842f3b6
[INFO] building yangcancai/hello_rust against master#461e8078010433ff7de2db2aaae8a3cfb0847215 for pr-94962
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fyangcancai%2Fhello_rust" "/workspace/builds/worker-26/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-26/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/yangcancai/hello_rust on toolchain 461e8078010433ff7de2db2aaae8a3cfb0847215
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+461e8078010433ff7de2db2aaae8a3cfb0847215" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/yangcancai/hello_rust
[INFO] finished tweaking git repo https://github.com/yangcancai/hello_rust
[INFO] tweaked toml for git repo https://github.com/yangcancai/hello_rust written to /workspace/builds/worker-26/source/Cargo.toml
[INFO] crate git repo https://github.com/yangcancai/hello_rust already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+461e8078010433ff7de2db2aaae8a3cfb0847215" "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 pinky-swear v4.4.0
[INFO] [stderr]   Downloaded amq-protocol v6.0.3
[INFO] [stderr]   Downloaded amq-protocol-types v6.0.3
[INFO] [stderr]   Downloaded tcp-stream v0.20.7
[INFO] [stderr]   Downloaded ctrlc v3.1.8
[INFO] [stderr]   Downloaded futures-executor v0.3.13
[INFO] [stderr]   Downloaded amq-protocol-tcp v6.0.3
[INFO] [stderr]   Downloaded amq-protocol-uri v6.0.3
[INFO] [stderr]   Downloaded lapin v1.7.1
[INFO] [stderr]   Downloaded tokio-amqp v1.0.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-26/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-26/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:eaef2f80f755933c374d2ae5edccceec0c1312ceb8a4e0b6404e8ab76561e1e5" "/opt/rustwide/cargo-home/bin/cargo" "+461e8078010433ff7de2db2aaae8a3cfb0847215" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] ff17cbed63ba8b3a4aebcd2cc59ec997da3dc96a9374255c7b90c38b61e9d42b
[INFO] running `Command { std: "docker" "start" "-a" "ff17cbed63ba8b3a4aebcd2cc59ec997da3dc96a9374255c7b90c38b61e9d42b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ff17cbed63ba8b3a4aebcd2cc59ec997da3dc96a9374255c7b90c38b61e9d42b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ff17cbed63ba8b3a4aebcd2cc59ec997da3dc96a9374255c7b90c38b61e9d42b", kill_on_drop: false }`
[INFO] [stdout] ff17cbed63ba8b3a4aebcd2cc59ec997da3dc96a9374255c7b90c38b61e9d42b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-26/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-26/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:eaef2f80f755933c374d2ae5edccceec0c1312ceb8a4e0b6404e8ab76561e1e5" "/opt/rustwide/cargo-home/bin/cargo" "+461e8078010433ff7de2db2aaae8a3cfb0847215" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] bbf8a91c5b446253866c812fe9f44b9ffa9e02c2a90ea2d641fc0cd45b57305b
[INFO] running `Command { std: "docker" "start" "-a" "bbf8a91c5b446253866c812fe9f44b9ffa9e02c2a90ea2d641fc0cd45b57305b", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling proc-macro2 v1.0.24
[INFO] [stderr]    Compiling unicode-xid v0.2.1
[INFO] [stderr]    Compiling syn v1.0.67
[INFO] [stderr]    Compiling libc v0.2.99
[INFO] [stderr]    Compiling cfg-if v1.0.0
[INFO] [stderr]    Compiling autocfg v1.0.1
[INFO] [stderr]    Compiling version_check v0.9.3
[INFO] [stderr]    Compiling memchr v2.3.4
[INFO] [stderr]    Compiling pin-project-lite v0.2.6
[INFO] [stderr]    Compiling log v0.4.14
[INFO] [stderr]    Compiling once_cell v1.8.0
[INFO] [stderr]    Compiling lazy_static v1.4.0
[INFO] [stderr]    Compiling futures-core v0.3.13
[INFO] [stderr]    Compiling bitflags v1.2.1
[INFO] [stderr]    Compiling cc v1.0.67
[INFO] [stderr]    Compiling pkg-config v0.3.19
[INFO] [stderr]    Compiling ryu v1.0.5
[INFO] [stderr]    Compiling futures-io v0.3.13
[INFO] [stderr]    Compiling smallvec v1.6.1
[INFO] [stderr]    Compiling serde_derive v1.0.127
[INFO] [stderr]    Compiling regex-syntax v0.6.25
[INFO] [stderr]    Compiling scopeguard v1.1.0
[INFO] [stderr]    Compiling rand_core v0.4.2
[INFO] [stderr]    Compiling serde v1.0.127
[INFO] [stderr]    Compiling tinyvec_macros v0.1.0
[INFO] [stderr]    Compiling autocfg v0.1.7
[INFO] [stderr]    Compiling radium v0.5.3
[INFO] [stderr]    Compiling openssl v0.10.36
[INFO] [stderr]    Compiling foreign-types-shared v0.1.1
[INFO] [stderr]    Compiling slab v0.4.2
[INFO] [stderr]    Compiling matches v0.1.9
[INFO] [stderr]    Compiling unicode-bidi v0.3.6
[INFO] [stderr]    Compiling lexical-core v0.7.6
[INFO] [stderr]    Compiling native-tls v0.2.8
[INFO] [stderr]    Compiling async-task v4.0.3
[INFO] [stderr]    Compiling cache-padded v1.1.1
[INFO] [stderr]    Compiling percent-encoding v2.1.0
[INFO] [stderr]    Compiling serde_json v1.0.66
[INFO] [stderr]    Compiling crossbeam-utils v0.8.5
[INFO] [stderr]    Compiling base64 v0.13.0
[INFO] [stderr]    Compiling waker-fn v1.1.0
[INFO] [stderr]    Compiling arrayvec v0.5.2
[INFO] [stderr]    Compiling fastrand v1.5.0
[INFO] [stderr]    Compiling tap v1.0.1
[INFO] [stderr]    Compiling proc-macro-hack v0.5.19
[INFO] [stderr]    Compiling event-listener v2.5.1
[INFO] [stderr]    Compiling wyz v0.2.0
[INFO] [stderr]    Compiling static_assertions v1.1.0
[INFO] [stderr]    Compiling itoa v0.4.7
[INFO] [stderr]    Compiling parking v2.0.0
[INFO] [stderr]    Compiling openssl-probe v0.1.4
[INFO] [stderr]    Compiling funty v1.1.0
[INFO] [stderr]    Compiling bytes v1.0.1
[INFO] [stderr]    Compiling proc-macro-nested v0.1.7
[INFO] [stderr]    Compiling doc-comment v0.3.3
[INFO] [stderr]    Compiling pin-utils v0.1.0
[INFO] [stderr]    Compiling futures-sink v0.3.13
[INFO] [stderr]    Compiling cookie-factory v0.3.2
[INFO] [stderr]    Compiling amq-protocol v6.0.3
[INFO] [stderr]    Compiling atomic-waker v1.0.0
[INFO] [stderr]    Compiling lapin v1.7.1
[INFO] [stderr]    Compiling futures-task v0.3.13
[INFO] [stderr]    Compiling ansi_term v0.12.1
[INFO] [stderr]    Compiling boxfnonce v0.1.1
[INFO] [stderr]    Compiling alloc v0.1.0 (/opt/rustwide/workdir/alloc)
[INFO] [stderr]    Compiling data_structure v0.1.0 (/opt/rustwide/workdir/data_structure)
[INFO] [stderr]    Compiling slice v0.1.0 (/opt/rustwide/workdir/slice)
[INFO] [stdout] warning: associated function is never used: `push`
[INFO] [stdout]   --> data_structure/src/lib.rs:59:12
[INFO] [stdout]    |
[INFO] [stdout] 59 |     pub fn push(&mut self, elem: T) {
[INFO] [stdout]    |            ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `remove`
[INFO] [stdout]   --> data_structure/src/lib.rs:69:12
[INFO] [stdout]    |
[INFO] [stdout] 69 |     pub fn remove(&mut self, elem: T) {
[INFO] [stdout]    |            ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling async-mutex v1.4.0
[INFO] [stderr]    Compiling async-lock v2.4.0
[INFO] [stderr]    Compiling tracing-core v0.1.19
[INFO] [stderr]    Compiling sharded-slab v0.1.3
[INFO] [stderr]    Compiling foreign-types v0.3.2
[INFO] [stderr]    Compiling rand_core v0.3.1
[INFO] [stderr]    Compiling rand_jitter v0.1.4
[INFO] [stderr]    Compiling concurrent-queue v1.2.2
[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-1.0.67/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=179828e65b0b359f -C extra-filename=-179828e65b0b359f --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] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "bbf8a91c5b446253866c812fe9f44b9ffa9e02c2a90ea2d641fc0cd45b57305b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bbf8a91c5b446253866c812fe9f44b9ffa9e02c2a90ea2d641fc0cd45b57305b", kill_on_drop: false }`
[INFO] [stdout] bbf8a91c5b446253866c812fe9f44b9ffa9e02c2a90ea2d641fc0cd45b57305b