Dec 19 14:23:44.685 INFO checking kevlarr/rusty-calc against master#d99a320cba42f661aebfa1293b7b2ec3603dda75 for pr-56955
Dec 19 14:23:44.685 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56955/worker-1/master#d99a320cba42f661aebfa1293b7b2ec3603dda75:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-56955/sources/master#d99a320cba42f661aebfa1293b7b2ec3603dda75/gh/kevlarr/rusty-calc:/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 14:23:45.058 INFO [stdout] 307d7709ac3d3fe9eaa37d86c8a618b6aa058c5233d4dedfcb02353f333c2d4b
Dec 19 14:23:45.060 INFO running `"docker" "start" "-a" "307d7709ac3d3fe9eaa37d86c8a618b6aa058c5233d4dedfcb02353f333c2d4b"`
Dec 19 14:23:46.900 INFO [stderr]     Checking rustycalc v0.1.0 (/opt/crater/workdir)
Dec 19 14:23:47.480 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 14:23:47.480 INFO [stderr]    --> src/types/binary.rs:111:9
Dec 19 14:23:47.480 INFO [stderr]     |
Dec 19 14:23:47.480 INFO [stderr] 111 |         write!(f, "0b");
Dec 19 14:23:47.480 INFO [stderr]     |         ^^^^^^^^^^^^^^^^
Dec 19 14:23:47.480 INFO [stderr]     |
Dec 19 14:23:47.480 INFO [stderr]     = note: #[warn(unused_must_use)] on by default
Dec 19 14:23:47.480 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 14:23:47.480 INFO [stderr]     = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
Dec 19 14:23:47.480 INFO [stderr] 
Dec 19 14:23:47.480 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 14:23:47.480 INFO [stderr]    --> src/types/binary.rs:115:17
Dec 19 14:23:47.480 INFO [stderr]     |
Dec 19 14:23:47.480 INFO [stderr] 115 |                 write!(f, "_");
Dec 19 14:23:47.480 INFO [stderr]     |                 ^^^^^^^^^^^^^^^
Dec 19 14:23:47.480 INFO [stderr]     |
Dec 19 14:23:47.480 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 14:23:47.480 INFO [stderr]     = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
Dec 19 14:23:47.480 INFO [stderr] 
Dec 19 14:23:47.784 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 14:23:47.784 INFO [stderr]    --> src/types/binary.rs:111:9
Dec 19 14:23:47.784 INFO [stderr]     |
Dec 19 14:23:47.784 INFO [stderr] 111 |         write!(f, "0b");
Dec 19 14:23:47.784 INFO [stderr]     |         ^^^^^^^^^^^^^^^^
Dec 19 14:23:47.784 INFO [stderr]     |
Dec 19 14:23:47.784 INFO [stderr]     = note: #[warn(unused_must_use)] on by default
Dec 19 14:23:47.784 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 14:23:47.784 INFO [stderr]     = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
Dec 19 14:23:47.784 INFO [stderr] 
Dec 19 14:23:47.784 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 14:23:47.784 INFO [stderr]    --> src/types/binary.rs:115:17
Dec 19 14:23:47.784 INFO [stderr]     |
Dec 19 14:23:47.784 INFO [stderr] 115 |                 write!(f, "_");
Dec 19 14:23:47.784 INFO [stderr]     |                 ^^^^^^^^^^^^^^^
Dec 19 14:23:47.784 INFO [stderr]     |
Dec 19 14:23:47.784 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 14:23:47.784 INFO [stderr]     = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
Dec 19 14:23:47.784 INFO [stderr] 
Dec 19 14:23:48.032 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.17s
Dec 19 14:23:48.970 INFO running `"docker" "inspect" "307d7709ac3d3fe9eaa37d86c8a618b6aa058c5233d4dedfcb02353f333c2d4b"`
Dec 19 14:23:49.223 INFO running `"docker" "rm" "-f" "307d7709ac3d3fe9eaa37d86c8a618b6aa058c5233d4dedfcb02353f333c2d4b"`
Dec 19 14:23:49.448 INFO [stdout] 307d7709ac3d3fe9eaa37d86c8a618b6aa058c5233d4dedfcb02353f333c2d4b