[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 master#432e145bd5a974c5b6f4dd9b352891bd7502b69d for pr-87041
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftruongtu2111%2Freturn_rust" "/workspace/builds/worker-12/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-12/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/truongtu2111/return_rust on toolchain 432e145bd5a974c5b6f4dd9b352891bd7502b69d
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+432e145bd5a974c5b6f4dd9b352891bd7502b69d" "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-12/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" "+432e145bd5a974c5b6f4dd9b352891bd7502b69d" "fetch" "--manifest-path" "Cargo.toml", 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] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+432e145bd5a974c5b6f4dd9b352891bd7502b69d" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 8bf84dba8fb6fd8963c70d0b66369c9f6562f5da5ae60d0bce8b0c600aef6055
[INFO] running `Command { std: "docker" "start" "-a" "8bf84dba8fb6fd8963c70d0b66369c9f6562f5da5ae60d0bce8b0c600aef6055", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "8bf84dba8fb6fd8963c70d0b66369c9f6562f5da5ae60d0bce8b0c600aef6055", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8bf84dba8fb6fd8963c70d0b66369c9f6562f5da5ae60d0bce8b0c600aef6055", kill_on_drop: false }`
[INFO] [stdout] 8bf84dba8fb6fd8963c70d0b66369c9f6562f5da5ae60d0bce8b0c600aef6055
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+432e145bd5a974c5b6f4dd9b352891bd7502b69d" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] db14fa203dc24fbbf0eca51cb7dff3c3661fd7383d9f8a3c782fc6a1eeddc329
[INFO] running `Command { std: "docker" "start" "-a" "db14fa203dc24fbbf0eca51cb7dff3c3661fd7383d9f8a3c782fc6a1eeddc329", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling libc v0.2.55
[INFO] [stderr]    Compiling rand_chacha v0.1.1
[INFO] [stderr]    Compiling rand_pcg v0.1.2
[INFO] [stderr]    Compiling rand_os v0.1.3
[INFO] [stderr]    Compiling rand v0.6.5
[INFO] [stderr]    Compiling return_rust v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 5.57s
[INFO] running `Command { std: "docker" "inspect" "db14fa203dc24fbbf0eca51cb7dff3c3661fd7383d9f8a3c782fc6a1eeddc329", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "db14fa203dc24fbbf0eca51cb7dff3c3661fd7383d9f8a3c782fc6a1eeddc329", kill_on_drop: false }`
[INFO] [stdout] db14fa203dc24fbbf0eca51cb7dff3c3661fd7383d9f8a3c782fc6a1eeddc329
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+432e145bd5a974c5b6f4dd9b352891bd7502b69d" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] e62616a137b2eb4373f4f66b52887d4a00f9701e05f2d32b22ddcfa79d4eb2b9
[INFO] running `Command { std: "docker" "start" "-a" "e62616a137b2eb4373f4f66b52887d4a00f9701e05f2d32b22ddcfa79d4eb2b9", kill_on_drop: false }`
[INFO] [stderr]    Compiling return_rust v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.72s
[INFO] running `Command { std: "docker" "inspect" "e62616a137b2eb4373f4f66b52887d4a00f9701e05f2d32b22ddcfa79d4eb2b9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e62616a137b2eb4373f4f66b52887d4a00f9701e05f2d32b22ddcfa79d4eb2b9", kill_on_drop: false }`
[INFO] [stdout] e62616a137b2eb4373f4f66b52887d4a00f9701e05f2d32b22ddcfa79d4eb2b9
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+432e145bd5a974c5b6f4dd9b352891bd7502b69d" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 3e7ee88f91e794bfcef82bc0b06e84cb42f5a1aa90f9592e21e26c6a780270b2
[INFO] running `Command { std: "docker" "start" "-a" "3e7ee88f91e794bfcef82bc0b06e84cb42f5a1aa90f9592e21e26c6a780270b2", kill_on_drop: false }`
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.03s
[INFO] [stdout] running 0 tests
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/return_rust-97a3d94aa41b6210)
[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" "3e7ee88f91e794bfcef82bc0b06e84cb42f5a1aa90f9592e21e26c6a780270b2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3e7ee88f91e794bfcef82bc0b06e84cb42f5a1aa90f9592e21e26c6a780270b2", kill_on_drop: false }`
[INFO] [stdout] 3e7ee88f91e794bfcef82bc0b06e84cb42f5a1aa90f9592e21e26c6a780270b2