[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] checking samdolt/cortex-m0 against try#4a04890980766cc79878135f5ade8c0c4321e943 for pr-65819
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsamdolt%2Fcortex-m0" "/workspace/builds/worker-5/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/samdolt/cortex-m0 on toolchain 4a04890980766cc79878135f5ade8c0c4321e943
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+4a04890980766cc79878135f5ade8c0c4321e943" "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-5/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" "+4a04890980766cc79878135f5ade8c0c4321e943" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded volatile-register v0.1.2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/jobserver:/tmp/crater-runner-fifo:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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" "rustops/crates-build-env@sha256:c46a2d1a26fb48b37929c74ca49dd9409f2375a0a3bdb8fe07617f3ffccaa889" "/opt/rustwide/cargo-home/bin/cargo" "+4a04890980766cc79878135f5ade8c0c4321e943" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 623baa0e2e29d82c28bb301389d61ec18a062a60387679a0956c1b3d24b66b8e
[INFO] running `Command { std: "docker" "start" "-a" "623baa0e2e29d82c28bb301389d61ec18a062a60387679a0956c1b3d24b66b8e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "623baa0e2e29d82c28bb301389d61ec18a062a60387679a0956c1b3d24b66b8e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "623baa0e2e29d82c28bb301389d61ec18a062a60387679a0956c1b3d24b66b8e", kill_on_drop: false }`
[INFO] [stdout] 623baa0e2e29d82c28bb301389d61ec18a062a60387679a0956c1b3d24b66b8e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/jobserver:/tmp/crater-runner-fifo:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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" "RUSTUP_TOOLCHAIN=4a04890980766cc79878135f5ade8c0c4321e943" "-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" "rustops/crates-build-env@sha256:c46a2d1a26fb48b37929c74ca49dd9409f2375a0a3bdb8fe07617f3ffccaa889" "/tmp/crater-runner-fifo/jobserver-crater-fwd" "/opt/rustwide/cargo-home/bin/cargo" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 190e7ed3de66c7a3c45bb55f4c1ae70b27dd58e5a235c80dc87a55fa1ae1b04b
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "190e7ed3de66c7a3c45bb55f4c1ae70b27dd58e5a235c80dc87a55fa1ae1b04b", kill_on_drop: false }`
[INFO] [stderr]     Checking volatile-register v0.1.2
[INFO] [stderr]     Checking 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: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0522`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `cortex-m0`
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `Command { std: "docker" "inspect" "190e7ed3de66c7a3c45bb55f4c1ae70b27dd58e5a235c80dc87a55fa1ae1b04b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "190e7ed3de66c7a3c45bb55f4c1ae70b27dd58e5a235c80dc87a55fa1ae1b04b", kill_on_drop: false }`
[INFO] [stdout] 190e7ed3de66c7a3c45bb55f4c1ae70b27dd58e5a235c80dc87a55fa1ae1b04b