[INFO] updating cached repository dread-deimos/rust-cowbulls-tutorial
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/dread-deimos/rust-cowbulls-tutorial
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/dread-deimos/rust-cowbulls-tutorial" "work/ex/pr-61753/sources/master#8e948df707ea8a3c88c65bf2ffdcb2f1cf5491be/gh/dread-deimos/rust-cowbulls-tutorial"`
[INFO] [stderr] Cloning into 'work/ex/pr-61753/sources/master#8e948df707ea8a3c88c65bf2ffdcb2f1cf5491be/gh/dread-deimos/rust-cowbulls-tutorial'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/dread-deimos/rust-cowbulls-tutorial" "work/ex/pr-61753/sources/try#af22dfc7f56a5057c6b6120a65c74e7b6c1530af/gh/dread-deimos/rust-cowbulls-tutorial"`
[INFO] [stderr] Cloning into 'work/ex/pr-61753/sources/try#af22dfc7f56a5057c6b6120a65c74e7b6c1530af/gh/dread-deimos/rust-cowbulls-tutorial'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] f1b31ab0a2bac7f52eeff550b8c5ff41accbe505
[INFO] sha for GitHub repo dread-deimos/rust-cowbulls-tutorial: f1b31ab0a2bac7f52eeff550b8c5ff41accbe505
[INFO] validating manifest of dread-deimos/rust-cowbulls-tutorial on toolchain master#8e948df707ea8a3c88c65bf2ffdcb2f1cf5491be
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+8e948df707ea8a3c88c65bf2ffdcb2f1cf5491be-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of dread-deimos/rust-cowbulls-tutorial on toolchain try#af22dfc7f56a5057c6b6120a65c74e7b6c1530af
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+af22dfc7f56a5057c6b6120a65c74e7b6c1530af-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing dread-deimos/rust-cowbulls-tutorial
[INFO] finished frobbing dread-deimos/rust-cowbulls-tutorial
[INFO] frobbed toml for dread-deimos/rust-cowbulls-tutorial written to work/ex/pr-61753/sources/master#8e948df707ea8a3c88c65bf2ffdcb2f1cf5491be/gh/dread-deimos/rust-cowbulls-tutorial/Cargo.toml
[INFO] started frobbing dread-deimos/rust-cowbulls-tutorial
[INFO] finished frobbing dread-deimos/rust-cowbulls-tutorial
[INFO] frobbed toml for dread-deimos/rust-cowbulls-tutorial written to work/ex/pr-61753/sources/try#af22dfc7f56a5057c6b6120a65c74e7b6c1530af/gh/dread-deimos/rust-cowbulls-tutorial/Cargo.toml
[INFO] crate dread-deimos/rust-cowbulls-tutorial already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+8e948df707ea8a3c88c65bf2ffdcb2f1cf5491be-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache lock
[INFO] [stderr] error: the lock file /mnt/big/crater/work/ex/pr-61753/sources/master#8e948df707ea8a3c88c65bf2ffdcb2f1cf5491be/gh/dread-deimos/rust-cowbulls-tutorial/Cargo.lock needs to be updated but --locked was passed to prevent this
[INFO] the lockfile is outdated, regenerating it
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+8e948df707ea8a3c88c65bf2ffdcb2f1cf5491be-alt" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+af22dfc7f56a5057c6b6120a65c74e7b6c1530af-alt" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+8e948df707ea8a3c88c65bf2ffdcb2f1cf5491be-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache lock
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+af22dfc7f56a5057c6b6120a65c74e7b6c1530af-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking dread-deimos/rust-cowbulls-tutorial against master#8e948df707ea8a3c88c65bf2ffdcb2f1cf5491be for pr-61753
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-61753/worker-7/master#8e948df707ea8a3c88c65bf2ffdcb2f1cf5491be:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-61753/sources/master#8e948df707ea8a3c88c65bf2ffdcb2f1cf5491be/gh/dread-deimos/rust-cowbulls-tutorial:/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" "+8e948df707ea8a3c88c65bf2ffdcb2f1cf5491be-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] d7b78689a7e73b979e11824df25ca236b65bad896953c52792ca94acd1b7bbaa
[INFO] running `"docker" "start" "-a" "d7b78689a7e73b979e11824df25ca236b65bad896953c52792ca94acd1b7bbaa"`
[INFO] [stderr]     Blocking waiting for file lock on package cache lock
[INFO] [stderr]     Checking cowbull v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused comparison that must be used
[INFO] [stderr]    --> src/game/mod.rs:229:25
[INFO] [stderr]     |
[INFO] [stderr] 229 |                         self.hint_table[v][i] == Hint::Here;
[INFO] [stderr]     |                         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(unused_must_use)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused comparison that must be used
[INFO] [stderr]    --> src/game/mod.rs:229:25
[INFO] [stderr]     |
[INFO] [stderr] 229 |                         self.hint_table[v][i] == Hint::Here;
[INFO] [stderr]     |                         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(unused_must_use)] on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.85s
[INFO] running `"docker" "inspect" "d7b78689a7e73b979e11824df25ca236b65bad896953c52792ca94acd1b7bbaa"`
[INFO] running `"docker" "rm" "-f" "d7b78689a7e73b979e11824df25ca236b65bad896953c52792ca94acd1b7bbaa"`
[INFO] [stdout] d7b78689a7e73b979e11824df25ca236b65bad896953c52792ca94acd1b7bbaa