[INFO] fetching crate code_runner 0.1.0...
[INFO] checking code_runner-0.1.0 against master#d62d3f7fa9a91d933213cc10e20e740608983f64 for pr-77015
[INFO] extracting crate code_runner 0.1.0 into /workspace/builds/worker-4/source
[INFO] validating manifest of crates.io crate code_runner 0.1.0 on toolchain d62d3f7fa9a91d933213cc10e20e740608983f64
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+d62d3f7fa9a91d933213cc10e20e740608983f64" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate code_runner 0.1.0
[INFO] finished tweaking crates.io crate code_runner 0.1.0
[INFO] tweaked toml for crates.io crate code_runner 0.1.0 written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+d62d3f7fa9a91d933213cc10e20e740608983f64" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+d62d3f7fa9a91d933213cc10e20e740608983f64" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+d62d3f7fa9a91d933213cc10e20e740608983f64" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] d43877f37928de2d6b158dcc8684425848d6ba6aa86edb93953e085bf0c5ca2b
[INFO] running `Command { std: "docker" "start" "-a" "d43877f37928de2d6b158dcc8684425848d6ba6aa86edb93953e085bf0c5ca2b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d43877f37928de2d6b158dcc8684425848d6ba6aa86edb93953e085bf0c5ca2b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d43877f37928de2d6b158dcc8684425848d6ba6aa86edb93953e085bf0c5ca2b", kill_on_drop: false }`
[INFO] [stdout] d43877f37928de2d6b158dcc8684425848d6ba6aa86edb93953e085bf0c5ca2b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+d62d3f7fa9a91d933213cc10e20e740608983f64" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] e7f37525d0e4165f905e72058850698e5501047e0cdfbc61d4abedbbca5717a3
[INFO] running `Command { std: "docker" "start" "-a" "e7f37525d0e4165f905e72058850698e5501047e0cdfbc61d4abedbbca5717a3", kill_on_drop: false }`
[INFO] [stderr]    Compiling getrandom v0.1.15
[INFO] [stderr]     Checking ppv-lite86 v0.2.9
[INFO] [stderr]     Checking serde v1.0.116
[INFO] [stderr]     Checking rand_core v0.5.1
[INFO] [stderr]     Checking rand_chacha v0.2.2
[INFO] [stderr]     Checking rand v0.7.3
[INFO] [stderr]     Checking uuid v0.8.1
[INFO] [stderr]     Checking serde_json v1.0.58
[INFO] [stderr]     Checking code_runner v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: function is never used: `save_to_temp`
[INFO] [stdout]    --> src/lib.rs:132:4
[INFO] [stdout]     |
[INFO] [stdout] 132 | fn save_to_temp(file: Vec<u8>, name: String) {
[INFO] [stdout]     |    ^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout] note: the lint level is defined here
[INFO] [stdout]    --> src/lib.rs:131:8
[INFO] [stdout]     |
[INFO] [stdout] 131 | #[warn(dead_code)]
[INFO] [stdout]     |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 14.80s
[INFO] running `Command { std: "docker" "inspect" "e7f37525d0e4165f905e72058850698e5501047e0cdfbc61d4abedbbca5717a3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e7f37525d0e4165f905e72058850698e5501047e0cdfbc61d4abedbbca5717a3", kill_on_drop: false }`
[INFO] [stdout] e7f37525d0e4165f905e72058850698e5501047e0cdfbc61d4abedbbca5717a3