[INFO] fetching crate hello_exercism 0.5.5...
[INFO] checking hello_exercism-0.5.5 against master#3e826bb11228508fbe749e594038d6727208aa94 for pr-82322
[INFO] extracting crate hello_exercism 0.5.5 into /workspace/builds/worker-3/source
[INFO] validating manifest of crates.io crate hello_exercism 0.5.5 on toolchain 3e826bb11228508fbe749e594038d6727208aa94
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+3e826bb11228508fbe749e594038d6727208aa94" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate hello_exercism 0.5.5
[INFO] finished tweaking crates.io crate hello_exercism 0.5.5
[INFO] tweaked toml for crates.io crate hello_exercism 0.5.5 written to /workspace/builds/worker-3/source/Cargo.toml
[INFO] crate crates.io crate hello_exercism 0.5.5 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+3e826bb11228508fbe749e594038d6727208aa94" "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-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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:f2f6bcd4b43ebee4e173f653a26493129bdb64017c85f916b780ca7fbdbaa79d" "/opt/rustwide/cargo-home/bin/cargo" "+3e826bb11228508fbe749e594038d6727208aa94" "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] d281a6608b50ff61767dfe3e665ae94e4ea0ece985547426e8a6b085ad61ac57
[INFO] running `Command { std: "docker" "start" "-a" "d281a6608b50ff61767dfe3e665ae94e4ea0ece985547426e8a6b085ad61ac57", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d281a6608b50ff61767dfe3e665ae94e4ea0ece985547426e8a6b085ad61ac57", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d281a6608b50ff61767dfe3e665ae94e4ea0ece985547426e8a6b085ad61ac57", kill_on_drop: false }`
[INFO] [stdout] d281a6608b50ff61767dfe3e665ae94e4ea0ece985547426e8a6b085ad61ac57
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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:f2f6bcd4b43ebee4e173f653a26493129bdb64017c85f916b780ca7fbdbaa79d" "/opt/rustwide/cargo-home/bin/cargo" "+3e826bb11228508fbe749e594038d6727208aa94" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 975c5b41b6c6e3c0ea914bacf51966397a067cf9f3f158a0d67148c452855533
[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" "975c5b41b6c6e3c0ea914bacf51966397a067cf9f3f158a0d67148c452855533", kill_on_drop: false }`
[INFO] [stderr]     Checking hello_extern v0.1.1
[INFO] [stderr]     Checking hello_exercism v0.5.5 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.71s
[INFO] running `Command { std: "docker" "inspect" "975c5b41b6c6e3c0ea914bacf51966397a067cf9f3f158a0d67148c452855533", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "975c5b41b6c6e3c0ea914bacf51966397a067cf9f3f158a0d67148c452855533", kill_on_drop: false }`
[INFO] [stdout] 975c5b41b6c6e3c0ea914bacf51966397a067cf9f3f158a0d67148c452855533