[INFO] fetching crate chord-composer 0.3.1...
[INFO] checking chord-composer-0.3.1 against master#7b3a7819371cef92a187e9bac8f7810ccde15216 for pr-74846
[INFO] extracting crate chord-composer 0.3.1 into /workspace/builds/worker-4/source
[INFO] validating manifest of crates.io crate chord-composer 0.3.1 on toolchain 7b3a7819371cef92a187e9bac8f7810ccde15216
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+7b3a7819371cef92a187e9bac8f7810ccde15216" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate chord-composer 0.3.1
[INFO] finished tweaking crates.io crate chord-composer 0.3.1
[INFO] tweaked toml for crates.io crate chord-composer 0.3.1 written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+7b3a7819371cef92a187e9bac8f7810ccde15216" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+7b3a7819371cef92a187e9bac8f7810ccde15216" "fetch" "--locked" "--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-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:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+7b3a7819371cef92a187e9bac8f7810ccde15216" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] be5a2b072c10d9d4385815cd298bbc99f8dd7e46878d5876e9acfdb86595712a
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "be5a2b072c10d9d4385815cd298bbc99f8dd7e46878d5876e9acfdb86595712a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "be5a2b072c10d9d4385815cd298bbc99f8dd7e46878d5876e9acfdb86595712a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "be5a2b072c10d9d4385815cd298bbc99f8dd7e46878d5876e9acfdb86595712a", kill_on_drop: false }`
[INFO] [stdout] be5a2b072c10d9d4385815cd298bbc99f8dd7e46878d5876e9acfdb86595712a
[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:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+7b3a7819371cef92a187e9bac8f7810ccde15216" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 683c997b0976143b437edb61ff7414bacbbc97e983cd0ba8fff5bf8c9d1a15de
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "683c997b0976143b437edb61ff7414bacbbc97e983cd0ba8fff5bf8c9d1a15de", kill_on_drop: false }`
[INFO] [stderr]    Compiling autocfg v1.0.0
[INFO] [stderr]    Compiling pkg-config v0.3.18
[INFO] [stderr]    Compiling cc v1.0.58
[INFO] [stderr]    Compiling cpal v0.10.0
[INFO] [stderr]    Compiling serde v1.0.115
[INFO] [stderr]     Checking hound v3.4.0
[INFO] [stderr]     Checking claxon v0.4.3
[INFO] [stderr]     Checking music-timer v0.1.6
[INFO] [stderr]     Checking yaml-rust v0.4.4
[INFO] [stderr]     Checking log v0.4.11
[INFO] [stderr]     Checking rand v0.4.6
[INFO] [stderr]     Checking getrandom v0.1.14
[INFO] [stderr]     Checking backtrace v0.3.50
[INFO] [stderr]     Checking slice-deque v0.3.0
[INFO] [stderr]     Checking ogg v0.7.0
[INFO] [stderr]     Checking smallvec v0.6.13
[INFO] [stderr]     Checking rand_core v0.5.1
[INFO] [stderr]     Checking ghakuf v0.5.5
[INFO] [stderr]     Checking lewton v0.9.4
[INFO] [stderr]     Checking rand_chacha v0.2.2
[INFO] [stderr]    Compiling num-traits v0.2.12
[INFO] [stderr]    Compiling num-integer v0.1.43
[INFO] [stderr]    Compiling num-iter v0.1.41
[INFO] [stderr]     Checking failure v0.1.8
[INFO] [stderr]    Compiling alsa-sys v0.1.2
[INFO] [stderr]     Checking rand v0.7.3
[INFO] [stderr]    Compiling minimp3-sys v0.3.2
[INFO] [stderr]     Checking num-complex v0.1.43
[INFO] [stderr]     Checking minimp3 v0.3.5
[INFO] [stderr]     Checking num-bigint v0.1.44
[INFO] [stderr]     Checking rodio v0.10.0
[INFO] [stderr]     Checking num-rational v0.1.42
[INFO] [stderr]     Checking num v0.1.42
[INFO] [stderr]     Checking stopwatch v0.0.7
[INFO] [stderr]     Checking serde_yaml v0.8.13
[INFO] [stderr]     Checking chord-composer v0.3.1 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 33.21s
[INFO] running `Command { std: "docker" "inspect" "683c997b0976143b437edb61ff7414bacbbc97e983cd0ba8fff5bf8c9d1a15de", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "683c997b0976143b437edb61ff7414bacbbc97e983cd0ba8fff5bf8c9d1a15de", kill_on_drop: false }`
[INFO] [stdout] 683c997b0976143b437edb61ff7414bacbbc97e983cd0ba8fff5bf8c9d1a15de