[INFO] cloning repository https://github.com/imachug/taco
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/imachug/taco" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fimachug%2Ftaco", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fimachug%2Ftaco'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] c165d9eb8c54dee786896acce6865f095092e24a
[INFO] testing imachug/taco against master#23949593103d03a82c7ebc2e84434ce6c6edc561 for pr-115235
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fimachug%2Ftaco" "/workspace/builds/worker-2-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/imachug/taco on toolchain 23949593103d03a82c7ebc2e84434ce6c6edc561
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+23949593103d03a82c7ebc2e84434ce6c6edc561" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/imachug/taco
[INFO] finished tweaking git repo https://github.com/imachug/taco
[INFO] tweaked toml for git repo https://github.com/imachug/taco written to /workspace/builds/worker-2-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/imachug/taco 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" "+23949593103d03a82c7ebc2e84434ce6c6edc561" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/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@sha256:4f8da3c744d2da974e54ce020a79f4ad54313e914ebeaab8fc086f07e8d8b066" "/opt/rustwide/cargo-home/bin/cargo" "+23949593103d03a82c7ebc2e84434ce6c6edc561" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 000bfa6cd1b92f47ca86ec3d54153133c6240481902cdf1fe07f6b178cd0decf
[INFO] running `Command { std: "docker" "start" "-a" "000bfa6cd1b92f47ca86ec3d54153133c6240481902cdf1fe07f6b178cd0decf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "000bfa6cd1b92f47ca86ec3d54153133c6240481902cdf1fe07f6b178cd0decf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "000bfa6cd1b92f47ca86ec3d54153133c6240481902cdf1fe07f6b178cd0decf", kill_on_drop: false }`
[INFO] [stdout] 000bfa6cd1b92f47ca86ec3d54153133c6240481902cdf1fe07f6b178cd0decf
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/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@sha256:4f8da3c744d2da974e54ce020a79f4ad54313e914ebeaab8fc086f07e8d8b066" "/opt/rustwide/cargo-home/bin/cargo" "+23949593103d03a82c7ebc2e84434ce6c6edc561" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 15db532970e0a206e3f18c97b76ddaa3e1f98a026c6643b94eac350e67b9a9fc
[INFO] running `Command { std: "docker" "start" "-a" "15db532970e0a206e3f18c97b76ddaa3e1f98a026c6643b94eac350e67b9a9fc", kill_on_drop: false }`
[INFO] [stderr]    Compiling taco v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: the feature `specialization` is incomplete and may not be safe to use and/or cause compiler crashes
[INFO] [stdout]  --> src/main.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(specialization)]
[INFO] [stdout]   |            ^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: see issue #31844 <https://github.com/rust-lang/rust/issues/31844> for more information
[INFO] [stdout]   = help: consider using `min_specialization` instead, which is more stable and complete
[INFO] [stdout]   = note: `#[warn(incomplete_features)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `weight` is never used
[INFO] [stdout]    --> src/compress.rs:238:12
[INFO] [stdout]     |
[INFO] [stdout] 237 | impl CompressedData {
[INFO] [stdout]     | ------------------- method in this implementation
[INFO] [stdout] 238 |     pub fn weight(&self) -> usize {
[INFO] [stdout]     |            ^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: static variable `cc` should have an upper case name
[INFO] [stdout]    --> src/autocompress.rs:133:12
[INFO] [stdout]     |
[INFO] [stdout] 133 | static mut cc: usize = 0usize;
[INFO] [stdout]     |            ^^ help: convert the identifier to upper case (notice the capitalization): `CC`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(non_upper_case_globals)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] LLVM ERROR: IO failure on output stream: No space left on device
[INFO] [stderr] error: could not compile `taco` (bin "taco"); 3 warnings emitted
[INFO] running `Command { std: "docker" "inspect" "15db532970e0a206e3f18c97b76ddaa3e1f98a026c6643b94eac350e67b9a9fc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "15db532970e0a206e3f18c97b76ddaa3e1f98a026c6643b94eac350e67b9a9fc", kill_on_drop: false }`
[INFO] [stdout] 15db532970e0a206e3f18c97b76ddaa3e1f98a026c6643b94eac350e67b9a9fc