[INFO] fetching crate rbuf 0.1.4...
[INFO] building rbuf-0.1.4 against try#4987e9d4227139400384ab59296ffee3b0fb1183 for pr-146237-2
[INFO] extracting crate rbuf 0.1.4 into /workspace/builds/worker-4-tc2/source
[INFO] started tweaking crates.io crate rbuf 0.1.4
[INFO] removed 0 missing tests
[INFO] finished tweaking crates.io crate rbuf 0.1.4
[INFO] tweaked toml for crates.io crate rbuf 0.1.4 written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate rbuf 0.1.4 on toolchain 4987e9d4227139400384ab59296ffee3b0fb1183
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+4987e9d4227139400384ab59296ffee3b0fb1183" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate rbuf 0.1.4 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" "+4987e9d4227139400384ab59296ffee3b0fb1183" "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-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+4987e9d4227139400384ab59296ffee3b0fb1183" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 231ba0c38073ea3061c0cc72ced82b8a5e8174a10dcc1243c75eaa771f5d2e28
[INFO] running `Command { std: "docker" "start" "-a" "231ba0c38073ea3061c0cc72ced82b8a5e8174a10dcc1243c75eaa771f5d2e28", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "231ba0c38073ea3061c0cc72ced82b8a5e8174a10dcc1243c75eaa771f5d2e28", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "231ba0c38073ea3061c0cc72ced82b8a5e8174a10dcc1243c75eaa771f5d2e28", kill_on_drop: false }`
[INFO] [stdout] 231ba0c38073ea3061c0cc72ced82b8a5e8174a10dcc1243c75eaa771f5d2e28
[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" "-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+4987e9d4227139400384ab59296ffee3b0fb1183" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 631619b068eb694ee1dae544629dfd1d30840db7656b8004725c0fe3e0e97c0f
[INFO] running `Command { std: "docker" "start" "-a" "631619b068eb694ee1dae544629dfd1d30840db7656b8004725c0fe3e0e97c0f", kill_on_drop: false }`
[INFO] [stderr]    Compiling rbuf v0.1.4 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.44s
[INFO] running `Command { std: "docker" "inspect" "631619b068eb694ee1dae544629dfd1d30840db7656b8004725c0fe3e0e97c0f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "631619b068eb694ee1dae544629dfd1d30840db7656b8004725c0fe3e0e97c0f", kill_on_drop: false }`
[INFO] [stdout] 631619b068eb694ee1dae544629dfd1d30840db7656b8004725c0fe3e0e97c0f
[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" "-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+4987e9d4227139400384ab59296ffee3b0fb1183" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 76dc71d10b0cb2d18e8d18767a9bdaf9b9c98f75e0ed7eef6a8dc074487d3ac9
[INFO] running `Command { std: "docker" "start" "-a" "76dc71d10b0cb2d18e8d18767a9bdaf9b9c98f75e0ed7eef6a8dc074487d3ac9", kill_on_drop: false }`
[INFO] [stderr]    Compiling rbuf v0.1.4 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 1.05s
[INFO] running `Command { std: "docker" "inspect" "76dc71d10b0cb2d18e8d18767a9bdaf9b9c98f75e0ed7eef6a8dc074487d3ac9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "76dc71d10b0cb2d18e8d18767a9bdaf9b9c98f75e0ed7eef6a8dc074487d3ac9", kill_on_drop: false }`
[INFO] [stdout] 76dc71d10b0cb2d18e8d18767a9bdaf9b9c98f75e0ed7eef6a8dc074487d3ac9