[INFO] fetching crate once_cell 1.7.2...
[INFO] checking once_cell-1.7.2 against master#a836d9b6413d9d593be6c09463ff8c4c70e56599 for pr-84037
[INFO] extracting crate once_cell 1.7.2 into /workspace/builds/worker-4/source
[INFO] validating manifest of crates.io crate once_cell 1.7.2 on toolchain a836d9b6413d9d593be6c09463ff8c4c70e56599
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a836d9b6413d9d593be6c09463ff8c4c70e56599" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate once_cell 1.7.2
[INFO] removed 0 missing examples
[INFO] finished tweaking crates.io crate once_cell 1.7.2
[INFO] tweaked toml for crates.io crate once_cell 1.7.2 written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] crate crates.io crate once_cell 1.7.2 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a836d9b6413d9d593be6c09463ff8c4c70e56599" "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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+a836d9b6413d9d593be6c09463ff8c4c70e56599" "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] f974eeb96b6c1ed779b6f51dc8dda1857cdc3e62cc6b35b82c3eda54e3ec550a
[INFO] running `Command { std: "docker" "start" "-a" "f974eeb96b6c1ed779b6f51dc8dda1857cdc3e62cc6b35b82c3eda54e3ec550a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f974eeb96b6c1ed779b6f51dc8dda1857cdc3e62cc6b35b82c3eda54e3ec550a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f974eeb96b6c1ed779b6f51dc8dda1857cdc3e62cc6b35b82c3eda54e3ec550a", kill_on_drop: false }`
[INFO] [stdout] f974eeb96b6c1ed779b6f51dc8dda1857cdc3e62cc6b35b82c3eda54e3ec550a
[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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+a836d9b6413d9d593be6c09463ff8c4c70e56599" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 1226cefc850504dcb5f27af6880e70ca8537a0090f569b37c9143bb506188f04
[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" "1226cefc850504dcb5f27af6880e70ca8537a0090f569b37c9143bb506188f04", kill_on_drop: false }`
[INFO] [stderr]    Compiling memchr v2.2.1
[INFO] [stderr]     Checking ucd-util v0.1.4
[INFO] [stderr]     Checking utf8-ranges v1.0.1
[INFO] [stderr]     Checking cfg-if v0.1.5
[INFO] [stderr]     Checking once_cell v1.7.2 (/opt/rustwide/workdir)
[INFO] [stderr]    Compiling crossbeam-utils v0.7.2
[INFO] [stderr]     Checking thread_local v0.3.6
[INFO] [stderr]     Checking regex-syntax v0.6.9
[INFO] [stderr]     Checking aho-corasick v0.7.4
[INFO] [stderr]     Checking regex v1.2.0
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 4.52s
[INFO] running `Command { std: "docker" "inspect" "1226cefc850504dcb5f27af6880e70ca8537a0090f569b37c9143bb506188f04", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1226cefc850504dcb5f27af6880e70ca8537a0090f569b37c9143bb506188f04", kill_on_drop: false }`
[INFO] [stdout] 1226cefc850504dcb5f27af6880e70ca8537a0090f569b37c9143bb506188f04