[INFO] cloning repository https://github.com/GrahamClark/collections-exercises-rust
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/GrahamClark/collections-exercises-rust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FGrahamClark%2Fcollections-exercises-rust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FGrahamClark%2Fcollections-exercises-rust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 07217f7bbfeea46e91534db8ae932919ea060e90
[INFO] checking GrahamClark/collections-exercises-rust against master#9503ea19edbf01b9435e80e17d60ce1b88390116 for pr-81782
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FGrahamClark%2Fcollections-exercises-rust" "/workspace/builds/worker-10/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-10/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/GrahamClark/collections-exercises-rust on toolchain 9503ea19edbf01b9435e80e17d60ce1b88390116
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+9503ea19edbf01b9435e80e17d60ce1b88390116" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/GrahamClark/collections-exercises-rust
[INFO] finished tweaking git repo https://github.com/GrahamClark/collections-exercises-rust
[INFO] tweaked toml for git repo https://github.com/GrahamClark/collections-exercises-rust written to /workspace/builds/worker-10/source/Cargo.toml
[INFO] crate git repo https://github.com/GrahamClark/collections-exercises-rust already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+9503ea19edbf01b9435e80e17d60ce1b88390116" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/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" "+9503ea19edbf01b9435e80e17d60ce1b88390116" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 610e12ce7344a325a1097129df94f403ced8d7c6d8fb9f5a55ade6c299721a9d
[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" "610e12ce7344a325a1097129df94f403ced8d7c6d8fb9f5a55ade6c299721a9d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "610e12ce7344a325a1097129df94f403ced8d7c6d8fb9f5a55ade6c299721a9d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "610e12ce7344a325a1097129df94f403ced8d7c6d8fb9f5a55ade6c299721a9d", kill_on_drop: false }`
[INFO] [stdout] 610e12ce7344a325a1097129df94f403ced8d7c6d8fb9f5a55ade6c299721a9d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/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" "+9503ea19edbf01b9435e80e17d60ce1b88390116" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 37f3777b2c5c73d2b52281b5a6c15b3daf306a0d37aa6b6bb6934663ed2719bd
[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" "37f3777b2c5c73d2b52281b5a6c15b3daf306a0d37aa6b6bb6934663ed2719bd", kill_on_drop: false }`
[INFO] [stderr]     Checking collections_exercises v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.97s
[INFO] running `Command { std: "docker" "inspect" "37f3777b2c5c73d2b52281b5a6c15b3daf306a0d37aa6b6bb6934663ed2719bd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "37f3777b2c5c73d2b52281b5a6c15b3daf306a0d37aa6b6bb6934663ed2719bd", kill_on_drop: false }`
[INFO] [stdout] 37f3777b2c5c73d2b52281b5a6c15b3daf306a0d37aa6b6bb6934663ed2719bd