[INFO] updating cached repository psFried/roman-numerals-rust
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/psFried/roman-numerals-rust
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/psFried/roman-numerals-rust" "work/ex/pr-63376/sources/master#60960a260f7b5c695fd0717311d72ce62dd4eb43/gh/psFried/roman-numerals-rust"`
[INFO] [stderr] Cloning into 'work/ex/pr-63376/sources/master#60960a260f7b5c695fd0717311d72ce62dd4eb43/gh/psFried/roman-numerals-rust'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/psFried/roman-numerals-rust" "work/ex/pr-63376/sources/try#266783e4e09e4e9d5307c1c8e695659c58bbcac7/gh/psFried/roman-numerals-rust"`
[INFO] [stderr] Cloning into 'work/ex/pr-63376/sources/try#266783e4e09e4e9d5307c1c8e695659c58bbcac7/gh/psFried/roman-numerals-rust'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] a5eb19ba0468ee970bf2118998631a74df84ab43
[INFO] sha for GitHub repo psFried/roman-numerals-rust: a5eb19ba0468ee970bf2118998631a74df84ab43
[INFO] validating manifest of psFried/roman-numerals-rust on toolchain master#60960a260f7b5c695fd0717311d72ce62dd4eb43
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+60960a260f7b5c695fd0717311d72ce62dd4eb43-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of psFried/roman-numerals-rust on toolchain try#266783e4e09e4e9d5307c1c8e695659c58bbcac7
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+266783e4e09e4e9d5307c1c8e695659c58bbcac7-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing psFried/roman-numerals-rust
[INFO] finished frobbing psFried/roman-numerals-rust
[INFO] frobbed toml for psFried/roman-numerals-rust written to work/ex/pr-63376/sources/master#60960a260f7b5c695fd0717311d72ce62dd4eb43/gh/psFried/roman-numerals-rust/Cargo.toml
[INFO] started frobbing psFried/roman-numerals-rust
[INFO] finished frobbing psFried/roman-numerals-rust
[INFO] frobbed toml for psFried/roman-numerals-rust written to work/ex/pr-63376/sources/try#266783e4e09e4e9d5307c1c8e695659c58bbcac7/gh/psFried/roman-numerals-rust/Cargo.toml
[INFO] crate psFried/roman-numerals-rust already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+60960a260f7b5c695fd0717311d72ce62dd4eb43-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+266783e4e09e4e9d5307c1c8e695659c58bbcac7-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking psFried/roman-numerals-rust against master#60960a260f7b5c695fd0717311d72ce62dd4eb43 for pr-63376
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-63376/worker-7/master#60960a260f7b5c695fd0717311d72ce62dd4eb43:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-63376/sources/master#60960a260f7b5c695fd0717311d72ce62dd4eb43/gh/psFried/roman-numerals-rust:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/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" "+60960a260f7b5c695fd0717311d72ce62dd4eb43-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] c18ffb9d0e8d61f6f0df13aa06e264f075b789d6dd4f105c5b12b625a4509f6d
[INFO] running `"docker" "start" "-a" "c18ffb9d0e8d61f6f0df13aa06e264f075b789d6dd4f105c5b12b625a4509f6d"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Checking roman v0.0.1 (/opt/crater/workdir)
[INFO] [stderr] error[E0432]: unresolved import `std::slice::SliceConcatExt`
[INFO] [stderr]  --> src/main.rs:5:5
[INFO] [stderr]   |
[INFO] [stderr] 5 | use std::slice::SliceConcatExt;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^ no `SliceConcatExt` in `slice`
[INFO] [stderr] 
[INFO] [stderr] error[E0425]: cannot find function `set_exit_status` in module `std::env`
[INFO] [stderr]   --> src/main.rs:27:15
[INFO] [stderr]    |
[INFO] [stderr] 27 |     std::env::set_exit_status(1);
[INFO] [stderr]    |               ^^^^^^^^^^^^^^^ not found in `std::env`
[INFO] [stderr] 
[INFO] [stderr] error[E0432]: unresolved import `std::slice::SliceConcatExt`
[INFO] [stderr]  --> src/main.rs:5:5
[INFO] [stderr]   |
[INFO] [stderr] 5 | use std::slice::SliceConcatExt;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^ no `SliceConcatExt` in `slice`
[INFO] [stderr] 
[INFO] [stderr] error[E0425]: cannot find function `set_exit_status` in module `std::env`
[INFO] [stderr]   --> src/main.rs:27:15
[INFO] [stderr]    |
[INFO] [stderr] 27 |     std::env::set_exit_status(1);
[INFO] [stderr]    |               ^^^^^^^^^^^^^^^ not found in `std::env`
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 2 previous errors
[INFO] [stderr] 
[INFO] [stderr] Some errors have detailed explanations: E0425, E0432.
[INFO] [stderr] For more information about an error, try `rustc --explain E0425`.
[INFO] [stderr] error: Could not compile `roman`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: aborting due to 2 previous errors
[INFO] [stderr] 
[INFO] [stderr] Some errors have detailed explanations: E0425, E0432.
[INFO] [stderr] For more information about an error, try `rustc --explain E0425`.
[INFO] [stderr] error: Could not compile `roman`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "c18ffb9d0e8d61f6f0df13aa06e264f075b789d6dd4f105c5b12b625a4509f6d"`
[INFO] running `"docker" "rm" "-f" "c18ffb9d0e8d61f6f0df13aa06e264f075b789d6dd4f105c5b12b625a4509f6d"`
[INFO] [stdout] c18ffb9d0e8d61f6f0df13aa06e264f075b789d6dd4f105c5b12b625a4509f6d