Dec 19 11:43:17.864 INFO checking northerner/taxicab against master#d99a320cba42f661aebfa1293b7b2ec3603dda75 for pr-56955
Dec 19 11:43:17.865 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56955/worker-6/master#d99a320cba42f661aebfa1293b7b2ec3603dda75:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-56955/sources/master#d99a320cba42f661aebfa1293b7b2ec3603dda75/gh/northerner/taxicab:/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" "+d99a320cba42f661aebfa1293b7b2ec3603dda75-alt" "check" "--frozen" "--all" "--all-targets"`
Dec 19 11:43:18.214 INFO [stdout] ef0f57308074c29b679b32c2b0646467f9ead88821ca8abf0e1764f6db6e01b2
Dec 19 11:43:18.225 INFO running `"docker" "start" "-a" "ef0f57308074c29b679b32c2b0646467f9ead88821ca8abf0e1764f6db6e01b2"`
Dec 19 11:43:18.960 INFO [stderr]     Checking taxicab v0.1.0 (/opt/crater/workdir)
Dec 19 11:43:19.131 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 11:43:19.131 INFO [stderr]  --> src/main.rs:8:5
Dec 19 11:43:19.131 INFO [stderr]   |
Dec 19 11:43:19.131 INFO [stderr] 8 |     file.read_to_string(&mut buffer);
Dec 19 11:43:19.131 INFO [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 11:43:19.131 INFO [stderr]   |
Dec 19 11:43:19.131 INFO [stderr]   = note: #[warn(unused_must_use)] on by default
Dec 19 11:43:19.131 INFO [stderr]   = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 11:43:19.131 INFO [stderr] 
Dec 19 11:43:19.173 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 11:43:19.173 INFO [stderr]  --> src/main.rs:8:5
Dec 19 11:43:19.173 INFO [stderr]   |
Dec 19 11:43:19.173 INFO [stderr] 8 |     file.read_to_string(&mut buffer);
Dec 19 11:43:19.173 INFO [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 11:43:19.173 INFO [stderr]   |
Dec 19 11:43:19.173 INFO [stderr]   = note: #[warn(unused_must_use)] on by default
Dec 19 11:43:19.173 INFO [stderr]   = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 11:43:19.173 INFO [stderr] 
Dec 19 11:43:19.186 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.24s
Dec 19 11:43:19.523 INFO running `"docker" "inspect" "ef0f57308074c29b679b32c2b0646467f9ead88821ca8abf0e1764f6db6e01b2"`
Dec 19 11:43:19.662 INFO running `"docker" "rm" "-f" "ef0f57308074c29b679b32c2b0646467f9ead88821ca8abf0e1764f6db6e01b2"`
Dec 19 11:43:19.784 INFO [stdout] ef0f57308074c29b679b32c2b0646467f9ead88821ca8abf0e1764f6db6e01b2