Dec 19 17:59:54.934 INFO checking dgryski/rust-bf against master#d99a320cba42f661aebfa1293b7b2ec3603dda75 for pr-56955
Dec 19 17:59:54.934 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56955/worker-2/master#d99a320cba42f661aebfa1293b7b2ec3603dda75:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-56955/sources/master#d99a320cba42f661aebfa1293b7b2ec3603dda75/gh/dgryski/rust-bf:/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 17:59:55.190 INFO [stdout] b85412876e836601a31bfb59843019c9e7a5b6f298499e04c904bb136d94115e
Dec 19 17:59:55.192 INFO running `"docker" "start" "-a" "b85412876e836601a31bfb59843019c9e7a5b6f298499e04c904bb136d94115e"`
Dec 19 17:59:56.688 INFO [stderr]     Checking bf v0.1.0 (/opt/crater/workdir)
Dec 19 17:59:57.380 INFO [stderr] warning: unused variable: `arg1`
Dec 19 17:59:57.380 INFO [stderr]   --> src/main.rs:17:13
Dec 19 17:59:57.380 INFO [stderr]    |
Dec 19 17:59:57.380 INFO [stderr] 17 |     let ref arg1 = args[1];
Dec 19 17:59:57.380 INFO [stderr]    |             ^^^^ help: consider using `_arg1` instead
Dec 19 17:59:57.380 INFO [stderr]    |
Dec 19 17:59:57.380 INFO [stderr]    = note: #[warn(unused_variables)] on by default
Dec 19 17:59:57.380 INFO [stderr] 
Dec 19 17:59:57.420 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 17:59:57.420 INFO [stderr]   --> src/main.rs:31:9
Dec 19 17:59:57.420 INFO [stderr]    |
Dec 19 17:59:57.420 INFO [stderr] 31 |         io::stderr().write(err.as_bytes());
Dec 19 17:59:57.420 INFO [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 17:59:57.420 INFO [stderr]    |
Dec 19 17:59:57.420 INFO [stderr]    = note: #[warn(unused_must_use)] on by default
Dec 19 17:59:57.420 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 17:59:57.420 INFO [stderr] 
Dec 19 17:59:57.432 INFO [stderr] warning: unused variable: `arg1`
Dec 19 17:59:57.432 INFO [stderr]   --> src/main.rs:17:13
Dec 19 17:59:57.432 INFO [stderr]    |
Dec 19 17:59:57.432 INFO [stderr] 17 |     let ref arg1 = args[1];
Dec 19 17:59:57.432 INFO [stderr]    |             ^^^^ help: consider using `_arg1` instead
Dec 19 17:59:57.432 INFO [stderr]    |
Dec 19 17:59:57.432 INFO [stderr]    = note: #[warn(unused_variables)] on by default
Dec 19 17:59:57.432 INFO [stderr] 
Dec 19 17:59:57.464 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 17:59:57.464 INFO [stderr]   --> src/main.rs:31:9
Dec 19 17:59:57.464 INFO [stderr]    |
Dec 19 17:59:57.464 INFO [stderr] 31 |         io::stderr().write(err.as_bytes());
Dec 19 17:59:57.464 INFO [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 17:59:57.464 INFO [stderr]    |
Dec 19 17:59:57.464 INFO [stderr]    = note: #[warn(unused_must_use)] on by default
Dec 19 17:59:57.464 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 17:59:57.464 INFO [stderr] 
Dec 19 17:59:57.497 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.86s
Dec 19 17:59:58.224 INFO running `"docker" "inspect" "b85412876e836601a31bfb59843019c9e7a5b6f298499e04c904bb136d94115e"`
Dec 19 17:59:58.443 INFO running `"docker" "rm" "-f" "b85412876e836601a31bfb59843019c9e7a5b6f298499e04c904bb136d94115e"`
Dec 19 17:59:58.724 INFO [stdout] b85412876e836601a31bfb59843019c9e7a5b6f298499e04c904bb136d94115e