[INFO] updating cached repository breezykermo/os.phil-opp
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/breezykermo/os.phil-opp
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/breezykermo/os.phil-opp" "work/ex/pr-60932/sources/master#548add7f61bfcbe3bea3f5ccefb53c84da8fefe4/gh/breezykermo/os.phil-opp"`
[INFO] [stderr] Cloning into 'work/ex/pr-60932/sources/master#548add7f61bfcbe3bea3f5ccefb53c84da8fefe4/gh/breezykermo/os.phil-opp'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/breezykermo/os.phil-opp" "work/ex/pr-60932/sources/try#097e26225c5cc28d3042ad4c80eac7c488f78ee7/gh/breezykermo/os.phil-opp"`
[INFO] [stderr] Cloning into 'work/ex/pr-60932/sources/try#097e26225c5cc28d3042ad4c80eac7c488f78ee7/gh/breezykermo/os.phil-opp'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] d9d521e119098f3f6cf8bf154ef40f17b9ac37c2
[INFO] sha for GitHub repo breezykermo/os.phil-opp: d9d521e119098f3f6cf8bf154ef40f17b9ac37c2
[INFO] validating manifest of breezykermo/os.phil-opp on toolchain master#548add7f61bfcbe3bea3f5ccefb53c84da8fefe4
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+548add7f61bfcbe3bea3f5ccefb53c84da8fefe4-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of breezykermo/os.phil-opp on toolchain try#097e26225c5cc28d3042ad4c80eac7c488f78ee7
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+097e26225c5cc28d3042ad4c80eac7c488f78ee7-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing breezykermo/os.phil-opp
[INFO] finished frobbing breezykermo/os.phil-opp
[INFO] frobbed toml for breezykermo/os.phil-opp written to work/ex/pr-60932/sources/master#548add7f61bfcbe3bea3f5ccefb53c84da8fefe4/gh/breezykermo/os.phil-opp/Cargo.toml
[INFO] started frobbing breezykermo/os.phil-opp
[INFO] finished frobbing breezykermo/os.phil-opp
[INFO] frobbed toml for breezykermo/os.phil-opp written to work/ex/pr-60932/sources/try#097e26225c5cc28d3042ad4c80eac7c488f78ee7/gh/breezykermo/os.phil-opp/Cargo.toml
[INFO] crate breezykermo/os.phil-opp already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+548add7f61bfcbe3bea3f5ccefb53c84da8fefe4-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+097e26225c5cc28d3042ad4c80eac7c488f78ee7-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking breezykermo/os.phil-opp against master#548add7f61bfcbe3bea3f5ccefb53c84da8fefe4 for pr-60932
[INFO] running `"docker" "create" "-v" "/mnt/crater-raid/crater/work/local/target-dirs/pr-60932/worker-6/master#548add7f61bfcbe3bea3f5ccefb53c84da8fefe4:/opt/crater/target:rw,Z" "-v" "/mnt/crater-raid/crater/work/ex/pr-60932/sources/master#548add7f61bfcbe3bea3f5ccefb53c84da8fefe4/gh/breezykermo/os.phil-opp:/opt/crater/workdir:ro,Z" "-v" "/mnt/crater-raid/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/crater-raid/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+548add7f61bfcbe3bea3f5ccefb53c84da8fefe4-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 24da60ef144ad0d016d830b8fbc8305ed454f988807ee641b5edef3c0901b81a
[INFO] running `"docker" "start" "-a" "24da60ef144ad0d016d830b8fbc8305ed454f988807ee641b5edef3c0901b81a"`
[INFO] [stderr]     Checking bootloader v0.3.10
[INFO] [stderr]     Checking lk_os v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] error[E0433]: failed to resolve: maybe a missing `extern crate core;`?
[INFO] [stderr]   --> src/vga_buffer.rs:16:9
[INFO] [stderr]    |
[INFO] [stderr] 16 |     use core::fmt::Write;
[INFO] [stderr]    |         ^^^^ maybe a missing `extern crate core;`?
[INFO] [stderr] 
[INFO] [stderr] error[E0433]: failed to resolve: maybe a missing `extern crate core;`?
[INFO] [stderr]   --> src/main.rs:11:5
[INFO] [stderr]    |
[INFO] [stderr] 11 | use core::panic::PanicInfo;
[INFO] [stderr]    |     ^^^^ maybe a missing `extern crate core;`?
[INFO] [stderr] 
[INFO] [stderr] error[E0432]: unresolved import `core`
[INFO] [stderr]    --> src/vga_buffer.rs:127:5
[INFO] [stderr]     |
[INFO] [stderr] 127 | use core::fmt;
[INFO] [stderr]     |     ^^^^ maybe a missing `extern crate core;`?
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 3 previous errors
[INFO] [stderr] 
[INFO] [stderr] Some errors have detailed explanations: E0432, E0433.
[INFO] [stderr] For more information about an error, try `rustc --explain E0432`.
[INFO] [stderr] error: Could not compile `lk_os`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "24da60ef144ad0d016d830b8fbc8305ed454f988807ee641b5edef3c0901b81a"`
[INFO] running `"docker" "rm" "-f" "24da60ef144ad0d016d830b8fbc8305ed454f988807ee641b5edef3c0901b81a"`
[INFO] [stdout] 24da60ef144ad0d016d830b8fbc8305ed454f988807ee641b5edef3c0901b81a