[INFO] cloning repository https://github.com/DieracDelta/NixKernelTutorial
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/DieracDelta/NixKernelTutorial" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FDieracDelta%2FNixKernelTutorial", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FDieracDelta%2FNixKernelTutorial'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] c205c3e1d3cab083ff39899d9fef931ae07c3463
[INFO] testing DieracDelta/NixKernelTutorial against try#ecabaf78506b7a4668d42dc20268c086b93f0fad for pr-87041
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FDieracDelta%2FNixKernelTutorial" "/workspace/builds/worker-2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/DieracDelta/NixKernelTutorial on toolchain ecabaf78506b7a4668d42dc20268c086b93f0fad
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+ecabaf78506b7a4668d42dc20268c086b93f0fad" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/DieracDelta/NixKernelTutorial
[INFO] finished tweaking git repo https://github.com/DieracDelta/NixKernelTutorial
[INFO] tweaked toml for git repo https://github.com/DieracDelta/NixKernelTutorial written to /workspace/builds/worker-2/source/Cargo.toml
[INFO] crate git repo https://github.com/DieracDelta/NixKernelTutorial already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+ecabaf78506b7a4668d42dc20268c086b93f0fad" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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" "+ecabaf78506b7a4668d42dc20268c086b93f0fad" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 9ababb97a9378ed7ffaa49c84d62026c2a1c114394f3b288d8e74f59dae61547
[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" "9ababb97a9378ed7ffaa49c84d62026c2a1c114394f3b288d8e74f59dae61547", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "9ababb97a9378ed7ffaa49c84d62026c2a1c114394f3b288d8e74f59dae61547", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9ababb97a9378ed7ffaa49c84d62026c2a1c114394f3b288d8e74f59dae61547", kill_on_drop: false }`
[INFO] [stdout] 9ababb97a9378ed7ffaa49c84d62026c2a1c114394f3b288d8e74f59dae61547
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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" "+ecabaf78506b7a4668d42dc20268c086b93f0fad" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] e06d741f4354a727612ce2653fdbc55c4e1451fb912498af4c149c22e93d6511
[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" "e06d741f4354a727612ce2653fdbc55c4e1451fb912498af4c149c22e93d6511", kill_on_drop: false }`
[INFO] [stderr]    Compiling nix_example_kernel v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error: invalid register `a0`: unknown register
[INFO] [stdout]   --> src/main.rs:49:24
[INFO] [stdout]    |
[INFO] [stdout] 49 |     " , in(reg) (&ch), out("a0") _, out("a7") _
[INFO] [stdout]    |                        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: invalid register `a7`: unknown register
[INFO] [stdout]   --> src/main.rs:49:37
[INFO] [stdout]    |
[INFO] [stdout] 49 |     " , in(reg) (&ch), out("a0") _, out("a7") _
[INFO] [stdout]    |                                     ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: language item required, but not found: `eh_personality`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 3 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `nix_example_kernel`
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `Command { std: "docker" "inspect" "e06d741f4354a727612ce2653fdbc55c4e1451fb912498af4c149c22e93d6511", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e06d741f4354a727612ce2653fdbc55c4e1451fb912498af4c149c22e93d6511", kill_on_drop: false }`
[INFO] [stdout] e06d741f4354a727612ce2653fdbc55c4e1451fb912498af4c149c22e93d6511