[INFO] cloning repository https://github.com/psychehose/rust_variable
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/psychehose/rust_variable" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fpsychehose%2Frust_variable", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fpsychehose%2Frust_variable'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] cd56972e5043eed7a6755edc469a1367791b04d1
[INFO] checking psychehose/rust_variable against master#e23ae72ac7a393961886ea62df065ebb6def7d51 for pr-126571
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fpsychehose%2Frust_variable" "/workspace/builds/worker-5-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/psychehose/rust_variable on toolchain e23ae72ac7a393961886ea62df065ebb6def7d51
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+e23ae72ac7a393961886ea62df065ebb6def7d51" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/psychehose/rust_variable
[INFO] finished tweaking git repo https://github.com/psychehose/rust_variable
[INFO] tweaked toml for git repo https://github.com/psychehose/rust_variable written to /workspace/builds/worker-5-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/psychehose/rust_variable 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" "+e23ae72ac7a393961886ea62df065ebb6def7d51" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[ERROR] error running command: no output for 300 seconds
[ERROR] this task or one of its parent failed!
[ERROR] no output for 300 seconds
[ERROR] note: run with `RUST_BACKTRACE=1` to display a backtrace.
[INFO] checking psychehose/rust_variable against try#397f8958d101b259f6baaf92d107d770c95c3ce0 for pr-126571
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fpsychehose%2Frust_variable" "/workspace/builds/worker-5-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/psychehose/rust_variable on toolchain 397f8958d101b259f6baaf92d107d770c95c3ce0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+397f8958d101b259f6baaf92d107d770c95c3ce0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/psychehose/rust_variable
[INFO] finished tweaking git repo https://github.com/psychehose/rust_variable
[INFO] tweaked toml for git repo https://github.com/psychehose/rust_variable written to /workspace/builds/worker-5-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/psychehose/rust_variable 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" "+397f8958d101b259f6baaf92d107d770c95c3ce0" "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-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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:dff56e7819e73ed36160586b3445e93eb0be776c16704aeeded9c3fb668b2384" "/opt/rustwide/cargo-home/bin/cargo" "+397f8958d101b259f6baaf92d107d770c95c3ce0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] c48bb457d348dada844078da59bb5c6d7964598030f9ebb18bfafe41cb726c1c
[INFO] running `Command { std: "docker" "start" "-a" "c48bb457d348dada844078da59bb5c6d7964598030f9ebb18bfafe41cb726c1c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "c48bb457d348dada844078da59bb5c6d7964598030f9ebb18bfafe41cb726c1c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c48bb457d348dada844078da59bb5c6d7964598030f9ebb18bfafe41cb726c1c", kill_on_drop: false }`
[INFO] [stdout] c48bb457d348dada844078da59bb5c6d7964598030f9ebb18bfafe41cb726c1c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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" "-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:dff56e7819e73ed36160586b3445e93eb0be776c16704aeeded9c3fb668b2384" "/opt/rustwide/cargo-home/bin/cargo" "+397f8958d101b259f6baaf92d107d770c95c3ce0" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] a917a4369c575aab06f54ca88963647135c0613726c9d9000878be43a1fde12d
[INFO] running `Command { std: "docker" "start" "-a" "a917a4369c575aab06f54ca88963647135c0613726c9d9000878be43a1fde12d", kill_on_drop: false }`
[INFO] [stderr]     Checking basic_variable v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.12s
[INFO] running `Command { std: "docker" "inspect" "a917a4369c575aab06f54ca88963647135c0613726c9d9000878be43a1fde12d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a917a4369c575aab06f54ca88963647135c0613726c9d9000878be43a1fde12d", kill_on_drop: false }`
[INFO] [stdout] a917a4369c575aab06f54ca88963647135c0613726c9d9000878be43a1fde12d