[INFO] cloning repository https://github.com/terakun/spanning_tree_maze
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/terakun/spanning_tree_maze" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fterakun%2Fspanning_tree_maze", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fterakun%2Fspanning_tree_maze'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 7d76ea3667cf2b8d531d7634fb620d8387038961
[INFO] testing terakun/spanning_tree_maze against master#62efba8a050c64249dab942951bb28f710208bc8 for pr-90799
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fterakun%2Fspanning_tree_maze" "/workspace/builds/worker-83/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-83/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/terakun/spanning_tree_maze on toolchain 62efba8a050c64249dab942951bb28f710208bc8
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+62efba8a050c64249dab942951bb28f710208bc8" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/terakun/spanning_tree_maze
[INFO] finished tweaking git repo https://github.com/terakun/spanning_tree_maze
[INFO] tweaked toml for git repo https://github.com/terakun/spanning_tree_maze written to /workspace/builds/worker-83/source/Cargo.toml
[INFO] crate git repo https://github.com/terakun/spanning_tree_maze already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+62efba8a050c64249dab942951bb28f710208bc8" "fetch" "--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-83/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-83/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:e8397a04204aaf8b9f284182a6f9e27a3c2e67044d0943b4415b160bfc957681" "/opt/rustwide/cargo-home/bin/cargo" "+62efba8a050c64249dab942951bb28f710208bc8" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 7833128710b4912542c6414a9297170ca506129c4f1525899a6e49d90e04b160
[INFO] running `Command { std: "docker" "start" "-a" "7833128710b4912542c6414a9297170ca506129c4f1525899a6e49d90e04b160", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "7833128710b4912542c6414a9297170ca506129c4f1525899a6e49d90e04b160", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7833128710b4912542c6414a9297170ca506129c4f1525899a6e49d90e04b160", kill_on_drop: false }`
[INFO] [stdout] 7833128710b4912542c6414a9297170ca506129c4f1525899a6e49d90e04b160
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-83/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-83/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:e8397a04204aaf8b9f284182a6f9e27a3c2e67044d0943b4415b160bfc957681" "/opt/rustwide/cargo-home/bin/cargo" "+62efba8a050c64249dab942951bb28f710208bc8" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] ff6d0f47a9763b9ef0a2a34d0a18d67b4a6173ac2538441efeb5bb94560fb25c
[INFO] running `Command { std: "docker" "start" "-a" "ff6d0f47a9763b9ef0a2a34d0a18d67b4a6173ac2538441efeb5bb94560fb25c", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.39
[INFO] [stderr]    Compiling rand v0.4.2
[INFO] [stderr]    Compiling spanning_tree_maze v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 24.32s
[INFO] running `Command { std: "docker" "inspect" "ff6d0f47a9763b9ef0a2a34d0a18d67b4a6173ac2538441efeb5bb94560fb25c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ff6d0f47a9763b9ef0a2a34d0a18d67b4a6173ac2538441efeb5bb94560fb25c", kill_on_drop: false }`
[INFO] [stdout] ff6d0f47a9763b9ef0a2a34d0a18d67b4a6173ac2538441efeb5bb94560fb25c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-83/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-83/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:e8397a04204aaf8b9f284182a6f9e27a3c2e67044d0943b4415b160bfc957681" "/opt/rustwide/cargo-home/bin/cargo" "+62efba8a050c64249dab942951bb28f710208bc8" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 22ce712ce40bcef45890d47327c9c7b5a8b0357005857c03b6815013c6a3556f
[INFO] running `Command { std: "docker" "start" "-a" "22ce712ce40bcef45890d47327c9c7b5a8b0357005857c03b6815013c6a3556f", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling spanning_tree_maze v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 1.92s
[INFO] running `Command { std: "docker" "inspect" "22ce712ce40bcef45890d47327c9c7b5a8b0357005857c03b6815013c6a3556f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "22ce712ce40bcef45890d47327c9c7b5a8b0357005857c03b6815013c6a3556f", kill_on_drop: false }`
[INFO] [stdout] 22ce712ce40bcef45890d47327c9c7b5a8b0357005857c03b6815013c6a3556f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-83/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-83/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:e8397a04204aaf8b9f284182a6f9e27a3c2e67044d0943b4415b160bfc957681" "/opt/rustwide/cargo-home/bin/cargo" "+62efba8a050c64249dab942951bb28f710208bc8" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 68f1b16c1cff35b54599127c25b2dc99897058e9c10acf331ca353e924105837
[INFO] running `Command { std: "docker" "start" "-a" "68f1b16c1cff35b54599127c25b2dc99897058e9c10acf331ca353e924105837", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.08s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/spanning_tree_maze-3d853655d13db008)
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "68f1b16c1cff35b54599127c25b2dc99897058e9c10acf331ca353e924105837", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "68f1b16c1cff35b54599127c25b2dc99897058e9c10acf331ca353e924105837", kill_on_drop: false }`
[INFO] [stdout] 68f1b16c1cff35b54599127c25b2dc99897058e9c10acf331ca353e924105837