[INFO] fetching crate single-instance 0.1.2...
[INFO] checking single-instance-0.1.2 against master#6526e5c772f2da07db745c94ca6bb0a591a39ba4 for pr-80920
[INFO] extracting crate single-instance 0.1.2 into /workspace/builds/worker-0/source
[INFO] validating manifest of crates.io crate single-instance 0.1.2 on toolchain 6526e5c772f2da07db745c94ca6bb0a591a39ba4
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+6526e5c772f2da07db745c94ca6bb0a591a39ba4" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate single-instance 0.1.2
[INFO] finished tweaking crates.io crate single-instance 0.1.2
[INFO] tweaked toml for crates.io crate single-instance 0.1.2 written to /workspace/builds/worker-0/source/Cargo.toml
[INFO] crate crates.io crate single-instance 0.1.2 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+6526e5c772f2da07db745c94ca6bb0a591a39ba4" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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@sha256:21f1ed92105a0ef9b0d27ad8bdeb7f36f9f01ac17fffe3a3f3dc5241fc25d8f4" "/opt/rustwide/cargo-home/bin/cargo" "+6526e5c772f2da07db745c94ca6bb0a591a39ba4" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] f0f75f741d9046f637cd5df0bbdb635da3b42a9a4c627c7a7ef152adfe2cc16c
[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" "f0f75f741d9046f637cd5df0bbdb635da3b42a9a4c627c7a7ef152adfe2cc16c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f0f75f741d9046f637cd5df0bbdb635da3b42a9a4c627c7a7ef152adfe2cc16c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f0f75f741d9046f637cd5df0bbdb635da3b42a9a4c627c7a7ef152adfe2cc16c", kill_on_drop: false }`
[INFO] [stdout] f0f75f741d9046f637cd5df0bbdb635da3b42a9a4c627c7a7ef152adfe2cc16c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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@sha256:21f1ed92105a0ef9b0d27ad8bdeb7f36f9f01ac17fffe3a3f3dc5241fc25d8f4" "/opt/rustwide/cargo-home/bin/cargo" "+6526e5c772f2da07db745c94ca6bb0a591a39ba4" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] f0fb307b92a776fc7eec0fb6be78b021cfad3b3d0dfea6a35e1f13fd82bb2f41
[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" "f0fb307b92a776fc7eec0fb6be78b021cfad3b3d0dfea6a35e1f13fd82bb2f41", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.16
[INFO] [stderr]    Compiling failure_derive v0.1.7
[INFO] [stderr]     Checking rustc-demangle v0.1.16
[INFO] [stderr]     Checking cfg-if v0.1.10
[INFO] [stderr]     Checking widestring v0.2.2
[INFO] [stderr]    Compiling backtrace-sys v0.1.33
[INFO] [stderr]    Compiling quote v1.0.3
[INFO] [stderr]     Checking backtrace v0.3.45
[INFO] [stderr]    Compiling synstructure v0.12.3
[INFO] [stderr]     Checking failure v0.1.7
[INFO] [stderr]     Checking single-instance v0.1.2 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 21.22s
[INFO] running `Command { std: "docker" "inspect" "f0fb307b92a776fc7eec0fb6be78b021cfad3b3d0dfea6a35e1f13fd82bb2f41", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f0fb307b92a776fc7eec0fb6be78b021cfad3b3d0dfea6a35e1f13fd82bb2f41", kill_on_drop: false }`
[INFO] [stdout] f0fb307b92a776fc7eec0fb6be78b021cfad3b3d0dfea6a35e1f13fd82bb2f41