[INFO] fetching crate legal_chess 0.4.42...
[INFO] checking legal_chess-0.4.42 against master#c9228570668803e3e6402770d55f23a12c9ae686 for pr-79472
[INFO] extracting crate legal_chess 0.4.42 into /workspace/builds/worker-4/source
[INFO] validating manifest of crates.io crate legal_chess 0.4.42 on toolchain c9228570668803e3e6402770d55f23a12c9ae686
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+c9228570668803e3e6402770d55f23a12c9ae686" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate legal_chess 0.4.42
[INFO] finished tweaking crates.io crate legal_chess 0.4.42
[INFO] tweaked toml for crates.io crate legal_chess 0.4.42 written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+c9228570668803e3e6402770d55f23a12c9ae686" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+c9228570668803e3e6402770d55f23a12c9ae686" "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:c8ac004eab7d63a0ad09a2dde3d3353ba464f767bee4de425dc8f74c46a1905e" "/opt/rustwide/cargo-home/bin/cargo" "+c9228570668803e3e6402770d55f23a12c9ae686" "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] 6cacbe4296a30577473280f721f59c02110438bf733c18925d4dfc769f56bed1
[INFO] running `Command { std: "docker" "start" "-a" "6cacbe4296a30577473280f721f59c02110438bf733c18925d4dfc769f56bed1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "6cacbe4296a30577473280f721f59c02110438bf733c18925d4dfc769f56bed1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6cacbe4296a30577473280f721f59c02110438bf733c18925d4dfc769f56bed1", kill_on_drop: false }`
[INFO] [stdout] 6cacbe4296a30577473280f721f59c02110438bf733c18925d4dfc769f56bed1
[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" "+c9228570668803e3e6402770d55f23a12c9ae686" "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] 5142fb20a97c03acf645864621a01ac4098b1982b0daa26ac4b232513afa5da8
[INFO] running `Command { std: "docker" "start" "-a" "5142fb20a97c03acf645864621a01ac4098b1982b0daa26ac4b232513afa5da8", kill_on_drop: false }`
[INFO] [stderr]     Checking legal_chess v0.4.42 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.75s
[INFO] running `Command { std: "docker" "inspect" "5142fb20a97c03acf645864621a01ac4098b1982b0daa26ac4b232513afa5da8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5142fb20a97c03acf645864621a01ac4098b1982b0daa26ac4b232513afa5da8", kill_on_drop: false }`
[INFO] [stdout] 5142fb20a97c03acf645864621a01ac4098b1982b0daa26ac4b232513afa5da8