Dec 17 12:49:19.997 INFO checking underflowed/text-adventure-game-in-rust against master#96d1334e567237b1507cd277938e7ae2de75ff51 for pr-54252
Dec 17 12:49:19.997 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-54252/worker-7/master#96d1334e567237b1507cd277938e7ae2de75ff51:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-54252/sources/master#96d1334e567237b1507cd277938e7ae2de75ff51/gh/underflowed/text-adventure-game-in-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" "+96d1334e567237b1507cd277938e7ae2de75ff51-alt" "check" "--frozen" "--all" "--all-targets"`
Dec 17 12:49:20.396 INFO [stdout] 4d56898ed433239fde2a82324349e4a48054eeeb58d2f8f84c5d46120dcc05dc
Dec 17 12:49:20.402 INFO running `"docker" "start" "-a" "4d56898ed433239fde2a82324349e4a48054eeeb58d2f8f84c5d46120dcc05dc"`
Dec 17 12:49:21.957 INFO [stderr]     Checking text_adventure v0.1.0 (/opt/crater/workdir)
Dec 17 12:49:22.261 INFO [stderr] warning: method is never used: `to_string`
Dec 17 12:49:22.261 INFO [stderr]   --> src/main.rs:43:5
Dec 17 12:49:22.261 INFO [stderr]    |
Dec 17 12:49:22.261 INFO [stderr] 43 |     fn to_string(&self) -> &str {
Dec 17 12:49:22.261 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 17 12:49:22.261 INFO [stderr]    |
Dec 17 12:49:22.268 INFO [stderr]    = note: #[warn(dead_code)] on by default
Dec 17 12:49:22.268 INFO [stderr] 
Dec 17 12:49:22.268 INFO [stderr] warning: variant is never constructed: `MoveUp`
Dec 17 12:49:22.268 INFO [stderr]   --> src/main.rs:58:5
Dec 17 12:49:22.268 INFO [stderr]    |
Dec 17 12:49:22.268 INFO [stderr] 58 |     MoveUp,
Dec 17 12:49:22.268 INFO [stderr]    |     ^^^^^^
Dec 17 12:49:22.268 INFO [stderr] 
Dec 17 12:49:22.268 INFO [stderr] warning: variant is never constructed: `MoveDown`
Dec 17 12:49:22.268 INFO [stderr]   --> src/main.rs:60:5
Dec 17 12:49:22.268 INFO [stderr]    |
Dec 17 12:49:22.268 INFO [stderr] 60 |     MoveDown,
Dec 17 12:49:22.268 INFO [stderr]    |     ^^^^^^^^
Dec 17 12:49:22.268 INFO [stderr] 
Dec 17 12:49:22.316 INFO [stderr] warning: method is never used: `to_string`
Dec 17 12:49:22.316 INFO [stderr]   --> src/main.rs:43:5
Dec 17 12:49:22.316 INFO [stderr]    |
Dec 17 12:49:22.316 INFO [stderr] 43 |     fn to_string(&self) -> &str {
Dec 17 12:49:22.316 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 17 12:49:22.316 INFO [stderr]    |
Dec 17 12:49:22.316 INFO [stderr]    = note: #[warn(dead_code)] on by default
Dec 17 12:49:22.316 INFO [stderr] 
Dec 17 12:49:22.316 INFO [stderr] warning: variant is never constructed: `MoveUp`
Dec 17 12:49:22.316 INFO [stderr]   --> src/main.rs:58:5
Dec 17 12:49:22.316 INFO [stderr]    |
Dec 17 12:49:22.316 INFO [stderr] 58 |     MoveUp,
Dec 17 12:49:22.316 INFO [stderr]    |     ^^^^^^
Dec 17 12:49:22.316 INFO [stderr] 
Dec 17 12:49:22.316 INFO [stderr] warning: variant is never constructed: `MoveDown`
Dec 17 12:49:22.316 INFO [stderr]   --> src/main.rs:60:5
Dec 17 12:49:22.317 INFO [stderr]    |
Dec 17 12:49:22.317 INFO [stderr] 60 |     MoveDown,
Dec 17 12:49:22.317 INFO [stderr]    |     ^^^^^^^^
Dec 17 12:49:22.317 INFO [stderr] 
Dec 17 12:49:22.364 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.43s
Dec 17 12:49:22.929 INFO running `"docker" "inspect" "4d56898ed433239fde2a82324349e4a48054eeeb58d2f8f84c5d46120dcc05dc"`
Dec 17 12:49:23.228 INFO running `"docker" "rm" "-f" "4d56898ed433239fde2a82324349e4a48054eeeb58d2f8f84c5d46120dcc05dc"`
Dec 17 12:49:23.504 INFO [stdout] 4d56898ed433239fde2a82324349e4a48054eeeb58d2f8f84c5d46120dcc05dc