[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#722e1797249a965b6335aebd65d777f917e498f1 for pr-91031
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FDieracDelta%2FNixKernelTutorial" "/workspace/builds/worker-58/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-58/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/DieracDelta/NixKernelTutorial on toolchain 722e1797249a965b6335aebd65d777f917e498f1
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+722e1797249a965b6335aebd65d777f917e498f1" "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-58/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" "+722e1797249a965b6335aebd65d777f917e498f1" "fetch" "--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: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-58/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-58/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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+722e1797249a965b6335aebd65d777f917e498f1" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 3add9da6724e7838b860b2af362bfe238dcf2d544196f5f3a43d31db2515906c
[INFO] running `Command { std: "docker" "start" "-a" "3add9da6724e7838b860b2af362bfe238dcf2d544196f5f3a43d31db2515906c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "3add9da6724e7838b860b2af362bfe238dcf2d544196f5f3a43d31db2515906c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3add9da6724e7838b860b2af362bfe238dcf2d544196f5f3a43d31db2515906c", kill_on_drop: false }`
[INFO] [stdout] 3add9da6724e7838b860b2af362bfe238dcf2d544196f5f3a43d31db2515906c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-58/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-58/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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+722e1797249a965b6335aebd65d777f917e498f1" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 31b016bf68690c5cc5a729f62f64c91bbc5a8ef2c696e502c377bd3edb20d531
[INFO] running `Command { std: "docker" "start" "-a" "31b016bf68690c5cc5a729f62f64c91bbc5a8ef2c696e502c377bd3edb20d531", kill_on_drop: false }`
[INFO] [stderr]    Compiling nix_example_kernel v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0658]: sym operands for inline assembly are unstable
[INFO] [stdout]   --> src/main.rs:21:13
[INFO] [stdout]    |
[INFO] [stdout] 21 |             end_stack = sym _end_stack,
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: see issue #72016 <https://github.com/rust-lang/rust/issues/72016> for more information
[INFO] [stdout]    = help: add `#![feature(asm_sym)]` to the crate attributes to enable
[INFO] [stdout] 
[INFO] [stdout] 
[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 4 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0658`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `nix_example_kernel` due to 5 previous errors
[INFO] running `Command { std: "docker" "inspect" "31b016bf68690c5cc5a729f62f64c91bbc5a8ef2c696e502c377bd3edb20d531", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "31b016bf68690c5cc5a729f62f64c91bbc5a8ef2c696e502c377bd3edb20d531", kill_on_drop: false }`
[INFO] [stdout] 31b016bf68690c5cc5a729f62f64c91bbc5a8ef2c696e502c377bd3edb20d531