[INFO] cloning repository https://github.com/samdolt/cortex-m0
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/samdolt/cortex-m0" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsamdolt%2Fcortex-m0", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsamdolt%2Fcortex-m0'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 096e2edbddc76996064dfe0bc890c8f1f4ae0c93
[INFO] testing samdolt/cortex-m0 against master#432e145bd5a974c5b6f4dd9b352891bd7502b69d for pr-87041
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsamdolt%2Fcortex-m0" "/workspace/builds/worker-3/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/samdolt/cortex-m0 on toolchain 432e145bd5a974c5b6f4dd9b352891bd7502b69d
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+432e145bd5a974c5b6f4dd9b352891bd7502b69d" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/samdolt/cortex-m0
[INFO] finished tweaking git repo https://github.com/samdolt/cortex-m0
[INFO] tweaked toml for git repo https://github.com/samdolt/cortex-m0 written to /workspace/builds/worker-3/source/Cargo.toml
[INFO] crate git repo https://github.com/samdolt/cortex-m0 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+432e145bd5a974c5b6f4dd9b352891bd7502b69d" "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-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+432e145bd5a974c5b6f4dd9b352891bd7502b69d" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] f8707da4f7f06c1f3deee587f12c6e7546f35dfe0c901a24cc5e4a3c3ff6a8f0
[INFO] running `Command { std: "docker" "start" "-a" "f8707da4f7f06c1f3deee587f12c6e7546f35dfe0c901a24cc5e4a3c3ff6a8f0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f8707da4f7f06c1f3deee587f12c6e7546f35dfe0c901a24cc5e4a3c3ff6a8f0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f8707da4f7f06c1f3deee587f12c6e7546f35dfe0c901a24cc5e4a3c3ff6a8f0", kill_on_drop: false }`
[INFO] [stdout] f8707da4f7f06c1f3deee587f12c6e7546f35dfe0c901a24cc5e4a3c3ff6a8f0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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" "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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+432e145bd5a974c5b6f4dd9b352891bd7502b69d" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 12643c827a2b71c8c036a2bdd7864b38ea1b483c57c009308aafb42d880669a6
[INFO] running `Command { std: "docker" "start" "-a" "12643c827a2b71c8c036a2bdd7864b38ea1b483c57c009308aafb42d880669a6", kill_on_drop: false }`
[INFO] [stderr]    Compiling volatile-register v0.1.2
[INFO] [stderr]    Compiling cortex-m0 v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0522]: definition of an unknown language item: `panic_fmt`
[INFO] [stdout]    --> src/main.rs:199:5
[INFO] [stdout]     |
[INFO] [stdout] 199 |     #[lang = "panic_fmt"]
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^ definition of unknown language item `panic_fmt`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: `#[panic_handler]` function required, but not found
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `cortex-m0`
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] [stdout] error: aborting due to 2 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0522`.
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "12643c827a2b71c8c036a2bdd7864b38ea1b483c57c009308aafb42d880669a6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "12643c827a2b71c8c036a2bdd7864b38ea1b483c57c009308aafb42d880669a6", kill_on_drop: false }`
[INFO] [stdout] 12643c827a2b71c8c036a2bdd7864b38ea1b483c57c009308aafb42d880669a6