[INFO] cloning repository https://github.com/Romira915/combinatorial_optimization_solver
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Romira915/combinatorial_optimization_solver" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FRomira915%2Fcombinatorial_optimization_solver", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FRomira915%2Fcombinatorial_optimization_solver'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 92307df55dc7cb6dde131d636e9f1dfcd696b8f2
[INFO] checking Romira915/combinatorial_optimization_solver/92307df55dc7cb6dde131d636e9f1dfcd696b8f2 against try#4d98531622e1718ae0bc3c7a1ab9cd8938428452+rustflags=-Dtail_expr_drop_order for pr-129604
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FRomira915%2Fcombinatorial_optimization_solver" "/workspace/builds/worker-4-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4-tc2/source'...
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[INFO] validating manifest of git repo https://github.com/Romira915/combinatorial_optimization_solver on toolchain 4d98531622e1718ae0bc3c7a1ab9cd8938428452
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+4d98531622e1718ae0bc3c7a1ab9cd8938428452" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/Romira915/combinatorial_optimization_solver
[INFO] finished tweaking git repo https://github.com/Romira915/combinatorial_optimization_solver
[INFO] tweaked toml for git repo https://github.com/Romira915/combinatorial_optimization_solver written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/Romira915/combinatorial_optimization_solver already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+4d98531622e1718ae0bc3c7a1ab9cd8938428452" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+4d98531622e1718ae0bc3c7a1ab9cd8938428452" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] c1b22beb97b3f0e57521bc384e7746ec27e0081afb7d8879a38f113ea4b78d1d
[INFO] running `Command { std: "docker" "start" "-a" "c1b22beb97b3f0e57521bc384e7746ec27e0081afb7d8879a38f113ea4b78d1d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "c1b22beb97b3f0e57521bc384e7746ec27e0081afb7d8879a38f113ea4b78d1d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c1b22beb97b3f0e57521bc384e7746ec27e0081afb7d8879a38f113ea4b78d1d", kill_on_drop: false }`
[INFO] [stdout] c1b22beb97b3f0e57521bc384e7746ec27e0081afb7d8879a38f113ea4b78d1d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/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 -Dtail_expr_drop_order" "-e" "RUSTDOCFLAGS=--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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+4d98531622e1718ae0bc3c7a1ab9cd8938428452" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 4d3b61ad595eb21489c7698a5f29c6775f17bcef12b957aeebf90518facf7042
[INFO] running `Command { std: "docker" "start" "-a" "4d3b61ad595eb21489c7698a5f29c6775f17bcef12b957aeebf90518facf7042", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.28
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[ERROR] error running command: no output for 300 seconds
[INFO] running `Command { std: "docker" "inspect" "4d3b61ad595eb21489c7698a5f29c6775f17bcef12b957aeebf90518facf7042", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4d3b61ad595eb21489c7698a5f29c6775f17bcef12b957aeebf90518facf7042", kill_on_drop: false }`
[INFO] [stdout] 4d3b61ad595eb21489c7698a5f29c6775f17bcef12b957aeebf90518facf7042