[INFO] fetching crate foldiff 0.2.0...
[INFO] checking foldiff-0.2.0 against try#35b6491ce6d2b388d0a5de1e59e2123604af807f for pr-136539
[INFO] extracting crate foldiff 0.2.0 into /workspace/builds/worker-0-tc2/source
[INFO] validating manifest of crates.io crate foldiff 0.2.0 on toolchain 35b6491ce6d2b388d0a5de1e59e2123604af807f
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+35b6491ce6d2b388d0a5de1e59e2123604af807f" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate foldiff 0.2.0
[INFO] finished tweaking crates.io crate foldiff 0.2.0
[INFO] tweaked toml for crates.io crate foldiff 0.2.0 written to /workspace/builds/worker-0-tc2/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+35b6491ce6d2b388d0a5de1e59e2123604af807f" "generate-lockfile" "--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: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+35b6491ce6d2b388d0a5de1e59e2123604af807f" "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-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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@sha256:3959728d45483eb673ba100a951a6b9f5012970368db2a9e08e0ac9b67c8a5ad" "/opt/rustwide/cargo-home/bin/cargo" "+35b6491ce6d2b388d0a5de1e59e2123604af807f" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] b1cd27d03b61aba9d42d8eb826582c0a0e554ec5d09d547150c689ea49c5e34a
[INFO] running `Command { std: "docker" "start" "-a" "b1cd27d03b61aba9d42d8eb826582c0a0e554ec5d09d547150c689ea49c5e34a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b1cd27d03b61aba9d42d8eb826582c0a0e554ec5d09d547150c689ea49c5e34a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b1cd27d03b61aba9d42d8eb826582c0a0e554ec5d09d547150c689ea49c5e34a", kill_on_drop: false }`
[INFO] [stdout] b1cd27d03b61aba9d42d8eb826582c0a0e554ec5d09d547150c689ea49c5e34a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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@sha256:3959728d45483eb673ba100a951a6b9f5012970368db2a9e08e0ac9b67c8a5ad" "/opt/rustwide/cargo-home/bin/cargo" "+35b6491ce6d2b388d0a5de1e59e2123604af807f" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 0749d0bd95ca240d23f201151ea1cd3466f034d2f7917e76755ad2c764fd3d6e
[INFO] running `Command { std: "docker" "start" "-a" "0749d0bd95ca240d23f201151ea1cd3466f034d2f7917e76755ad2c764fd3d6e", kill_on_drop: false }`
[INFO] [stderr]     Checking foldiff v0.2.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `super::*`
[INFO] [stdout]    --> src/lib.rs:127:9
[INFO] [stdout]     |
[INFO] [stdout] 127 |     use super::*;
[INFO] [stdout]     |         ^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/comparison_report.rs:15:9
[INFO] [stdout]    |
[INFO] [stdout] 15 |         writeln!(f, "\n{}", SEPARATOR);
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]    = note: this warning originates in the macro `writeln` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/comparison_report.rs:17:9
[INFO] [stdout]    |
[INFO] [stdout] 17 |         writeln!(f, "{}", SEPARATOR);
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]    = note: this warning originates in the macro `writeln` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/comparison_report.rs:22:9
[INFO] [stdout]    |
[INFO] [stdout] 22 |         writeln!(f, "\n{}", SEPARATOR);
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]    = note: this warning originates in the macro `writeln` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/comparison_report.rs:24:9
[INFO] [stdout]    |
[INFO] [stdout] 24 |         writeln!(f, "{}", SEPARATOR);
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]    = note: this warning originates in the macro `writeln` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/comparison_report.rs:30:9
[INFO] [stdout]    |
[INFO] [stdout] 30 |         writeln!(f, "\n{}", SEPARATOR);
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]    = note: this warning originates in the macro `writeln` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/comparison_report.rs:32:9
[INFO] [stdout]    |
[INFO] [stdout] 32 |         writeln!(f, "{}", SEPARATOR);
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]    = note: this warning originates in the macro `writeln` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `foldiff` (lib test); 1 warning emitted
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   No space left on device (os error 28)
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   failed to parse process output: `/opt/rustwide/rustup-home/toolchains/35b6491ce6d2b388d0a5de1e59e2123604af807f/bin/rustc --crate-name foldiff --edition=2018 src/lib.rs --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --emit=dep-info,metadata -C embed-bitcode=no -C debuginfo=2 --test --check-cfg 'cfg(docsrs,test)' --check-cfg 'cfg(feature, values())' -C metadata=dd53e112ff8b8862 -C extra-filename=-47abcae331fc77c6 --out-dir /opt/rustwide/target/debug/deps -L dependency=/opt/rustwide/target/debug/deps --cap-lints=forbid` (exit status: 0)
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: failed to write `/opt/rustwide/target/debug/.fingerprint/foldiff-3c29ed5430c58e99/lib-foldiff.json`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   No space left on device (os error 28)
[INFO] running `Command { std: "docker" "inspect" "0749d0bd95ca240d23f201151ea1cd3466f034d2f7917e76755ad2c764fd3d6e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0749d0bd95ca240d23f201151ea1cd3466f034d2f7917e76755ad2c764fd3d6e", kill_on_drop: false }`
[INFO] [stdout] 0749d0bd95ca240d23f201151ea1cd3466f034d2f7917e76755ad2c764fd3d6e