[INFO] cloning repository https://github.com/truongtu2111/return_rust
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/truongtu2111/return_rust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftruongtu2111%2Freturn_rust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftruongtu2111%2Freturn_rust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] c740a43c753605ef8ba66d02233dd26b6d78c2ed
[INFO] testing truongtu2111/return_rust against beta-2021-09-08 for beta-1.56-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftruongtu2111%2Freturn_rust" "/workspace/builds/worker-14/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-14/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/truongtu2111/return_rust on toolchain beta-2021-09-08
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-09-08" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/truongtu2111/return_rust
[INFO] finished tweaking git repo https://github.com/truongtu2111/return_rust
[INFO] tweaked toml for git repo https://github.com/truongtu2111/return_rust written to /workspace/builds/worker-14/source/Cargo.toml
[INFO] crate git repo https://github.com/truongtu2111/return_rust already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-09-08" "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-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-09-08" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 531a9a7b969d87f21616fa70f205b97d5b8618676456a8c67f79a04db14f8044
[INFO] running `Command { std: "docker" "start" "-a" "531a9a7b969d87f21616fa70f205b97d5b8618676456a8c67f79a04db14f8044", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "531a9a7b969d87f21616fa70f205b97d5b8618676456a8c67f79a04db14f8044", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "531a9a7b969d87f21616fa70f205b97d5b8618676456a8c67f79a04db14f8044", kill_on_drop: false }`
[INFO] [stdout] 531a9a7b969d87f21616fa70f205b97d5b8618676456a8c67f79a04db14f8044
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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=warn" "-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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-09-08" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] bd05dd049cedd383fed8f4bf05400ffc3c739283c12cdbb20bf14b03252427e8
[INFO] running `Command { std: "docker" "start" "-a" "bd05dd049cedd383fed8f4bf05400ffc3c739283c12cdbb20bf14b03252427e8", kill_on_drop: false }`
[INFO] [stderr]    Compiling return_rust v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.24s
[INFO] running `Command { std: "docker" "inspect" "bd05dd049cedd383fed8f4bf05400ffc3c739283c12cdbb20bf14b03252427e8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bd05dd049cedd383fed8f4bf05400ffc3c739283c12cdbb20bf14b03252427e8", kill_on_drop: false }`
[INFO] [stdout] bd05dd049cedd383fed8f4bf05400ffc3c739283c12cdbb20bf14b03252427e8
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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=warn" "-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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-09-08" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 6bce738abf43c8f813fbc311d8c28f278e2af9dd6a46d92eb4a984ea3eff5419
[INFO] running `Command { std: "docker" "start" "-a" "6bce738abf43c8f813fbc311d8c28f278e2af9dd6a46d92eb4a984ea3eff5419", kill_on_drop: false }`
[INFO] [stderr]    Compiling return_rust v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.90s
[INFO] running `Command { std: "docker" "inspect" "6bce738abf43c8f813fbc311d8c28f278e2af9dd6a46d92eb4a984ea3eff5419", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6bce738abf43c8f813fbc311d8c28f278e2af9dd6a46d92eb4a984ea3eff5419", kill_on_drop: false }`
[INFO] [stdout] 6bce738abf43c8f813fbc311d8c28f278e2af9dd6a46d92eb4a984ea3eff5419
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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=warn" "-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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-09-08" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] d530b574ce7e7a3a55d0c47d7e1df7bfcb0ca30702ae476c7592990655d37b4d
[INFO] running `Command { std: "docker" "start" "-a" "d530b574ce7e7a3a55d0c47d7e1df7bfcb0ca30702ae476c7592990655d37b4d", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 30.31s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/return_rust-500e471663136aca)
[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" "d530b574ce7e7a3a55d0c47d7e1df7bfcb0ca30702ae476c7592990655d37b4d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d530b574ce7e7a3a55d0c47d7e1df7bfcb0ca30702ae476c7592990655d37b4d", kill_on_drop: false }`
[INFO] [stdout] d530b574ce7e7a3a55d0c47d7e1df7bfcb0ca30702ae476c7592990655d37b4d