[INFO] fetching crate cfg-expr 0.5.1...
[INFO] checking cfg-expr-0.5.1 against master#2ad5292aea6328113b55968b4322528d48261316 for pr-80243
[INFO] extracting crate cfg-expr 0.5.1 into /workspace/builds/worker-4/source
[INFO] validating manifest of crates.io crate cfg-expr 0.5.1 on toolchain 2ad5292aea6328113b55968b4322528d48261316
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+2ad5292aea6328113b55968b4322528d48261316" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate cfg-expr 0.5.1
[INFO] finished tweaking crates.io crate cfg-expr 0.5.1
[INFO] tweaked toml for crates.io crate cfg-expr 0.5.1 written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] crate crates.io crate cfg-expr 0.5.1 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+2ad5292aea6328113b55968b4322528d48261316" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[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:c8ac004eab7d63a0ad09a2dde3d3353ba464f767bee4de425dc8f74c46a1905e" "/opt/rustwide/cargo-home/bin/cargo" "+2ad5292aea6328113b55968b4322528d48261316" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 8d6fb442057c93b5d56a944b8bc65b5b67a875f1024d46bca2d406890d333239
[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" "8d6fb442057c93b5d56a944b8bc65b5b67a875f1024d46bca2d406890d333239", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "8d6fb442057c93b5d56a944b8bc65b5b67a875f1024d46bca2d406890d333239", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8d6fb442057c93b5d56a944b8bc65b5b67a875f1024d46bca2d406890d333239", kill_on_drop: false }`
[INFO] [stdout] 8d6fb442057c93b5d56a944b8bc65b5b67a875f1024d46bca2d406890d333239
[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:c8ac004eab7d63a0ad09a2dde3d3353ba464f767bee4de425dc8f74c46a1905e" "/opt/rustwide/cargo-home/bin/cargo" "+2ad5292aea6328113b55968b4322528d48261316" "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] aaec341e9f1c717fb346e576f54e397353de249b4ae342e497fa23ce8dd6c555
[INFO] running `Command { std: "docker" "start" "-a" "aaec341e9f1c717fb346e576f54e397353de249b4ae342e497fa23ce8dd6c555", kill_on_drop: false }`
[INFO] [stderr]     Checking smallvec v1.4.2
[INFO] [stderr]     Checking difference v2.0.0
[INFO] [stderr]     Checking cfg-expr v0.5.1 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.39s
[INFO] running `Command { std: "docker" "inspect" "aaec341e9f1c717fb346e576f54e397353de249b4ae342e497fa23ce8dd6c555", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "aaec341e9f1c717fb346e576f54e397353de249b4ae342e497fa23ce8dd6c555", kill_on_drop: false }`
[INFO] [stdout] aaec341e9f1c717fb346e576f54e397353de249b4ae342e497fa23ce8dd6c555