Dec 19 15:14:11.533 INFO checking jfredett/synacor against master#d99a320cba42f661aebfa1293b7b2ec3603dda75 for pr-56955
Dec 19 15:14:11.533 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/jfredett/synacor:/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 15:14:11.790 INFO [stdout] 93640a3c80d8fe073d5cb2e195c5705f398979a3245f5aa08b2539e1ea8fb12c
Dec 19 15:14:11.792 INFO running `"docker" "start" "-a" "93640a3c80d8fe073d5cb2e195c5705f398979a3245f5aa08b2539e1ea8fb12c"`
Dec 19 15:14:12.361 INFO [stderr]     Checking synacor v0.1.0 (/opt/crater/workdir)
Dec 19 15:14:12.720 INFO [stderr] warning: use of deprecated item 'core::str::<impl str>::trim_left_matches': superseded by `trim_start_matches`
Dec 19 15:14:12.720 INFO [stderr]   --> src/address.rs:45:41
Dec 19 15:14:12.720 INFO [stderr]    |
Dec 19 15:14:12.720 INFO [stderr] 45 |             let v_res = u16::from_str(s.trim_left_matches("@"));
Dec 19 15:14:12.720 INFO [stderr]    |                                         ^^^^^^^^^^^^^^^^^
Dec 19 15:14:12.720 INFO [stderr]    |
Dec 19 15:14:12.720 INFO [stderr]    = note: #[warn(deprecated)] on by default
Dec 19 15:14:12.720 INFO [stderr] 
Dec 19 15:14:12.968 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 15:14:12.968 INFO [stderr]    --> src/vm.rs:186:9
Dec 19 15:14:12.968 INFO [stderr]     |
Dec 19 15:14:12.968 INFO [stderr] 186 |         stdin.read_exact(&mut buf);
Dec 19 15:14:12.968 INFO [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 15:14:12.968 INFO [stderr]     |
Dec 19 15:14:12.968 INFO [stderr]     = note: #[warn(unused_must_use)] on by default
Dec 19 15:14:12.968 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 15:14:12.968 INFO [stderr] 
Dec 19 15:14:13.453 INFO [stderr] warning: use of deprecated item 'core::str::<impl str>::trim_left_matches': superseded by `trim_start_matches`
Dec 19 15:14:13.453 INFO [stderr]   --> src/address.rs:45:41
Dec 19 15:14:13.453 INFO [stderr]    |
Dec 19 15:14:13.453 INFO [stderr] 45 |             let v_res = u16::from_str(s.trim_left_matches("@"));
Dec 19 15:14:13.453 INFO [stderr]    |                                         ^^^^^^^^^^^^^^^^^
Dec 19 15:14:13.453 INFO [stderr]    |
Dec 19 15:14:13.453 INFO [stderr]    = note: #[warn(deprecated)] on by default
Dec 19 15:14:13.453 INFO [stderr] 
Dec 19 15:14:14.994 INFO [stderr] warning: unused arithmetic operation that must be used
Dec 19 15:14:14.994 INFO [stderr]    --> src/u15.rs:163:30
Dec 19 15:14:14.994 INFO [stderr]     |
Dec 19 15:14:14.994 INFO [stderr] 163 |         fn sub_underflow() { u15(0) - u15(2); }
Dec 19 15:14:14.994 INFO [stderr]     |                              ^^^^^^^^^^^^^^^
Dec 19 15:14:14.994 INFO [stderr]     |
Dec 19 15:14:14.994 INFO [stderr]     = note: #[warn(unused_must_use)] on by default
Dec 19 15:14:14.994 INFO [stderr] 
Dec 19 15:14:14.994 INFO [stderr] warning: unused arithmetic operation that must be used
Dec 19 15:14:14.994 INFO [stderr]    --> src/u15.rs:167:28
Dec 19 15:14:14.994 INFO [stderr]     |
Dec 19 15:14:14.994 INFO [stderr] 167 |         fn div_by_zero() { u15(1) / u15(0); }
Dec 19 15:14:14.994 INFO [stderr]     |                            ^^^^^^^^^^^^^^^
Dec 19 15:14:14.994 INFO [stderr] 
Dec 19 15:14:14.994 INFO [stderr] warning: unused arithmetic operation that must be used
Dec 19 15:14:14.994 INFO [stderr]    --> src/u15.rs:223:26
Dec 19 15:14:14.994 INFO [stderr]     |
Dec 19 15:14:14.994 INFO [stderr] 223 |         fn sub_panic() { u15(16) - u15(17); }
Dec 19 15:14:14.994 INFO [stderr]     |                          ^^^^^^^^^^^^^^^^^
Dec 19 15:14:14.994 INFO [stderr] 
Dec 19 15:14:15.042 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 15:14:15.042 INFO [stderr]    --> src/vm.rs:186:9
Dec 19 15:14:15.042 INFO [stderr]     |
Dec 19 15:14:15.042 INFO [stderr] 186 |         stdin.read_exact(&mut buf);
Dec 19 15:14:15.042 INFO [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 15:14:15.042 INFO [stderr]     |
Dec 19 15:14:15.042 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 15:14:15.042 INFO [stderr] 
Dec 19 15:14:15.160 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.82s
Dec 19 15:14:15.521 INFO running `"docker" "inspect" "93640a3c80d8fe073d5cb2e195c5705f398979a3245f5aa08b2539e1ea8fb12c"`
Dec 19 15:14:15.632 INFO running `"docker" "rm" "-f" "93640a3c80d8fe073d5cb2e195c5705f398979a3245f5aa08b2539e1ea8fb12c"`
Dec 19 15:14:15.736 INFO [stdout] 93640a3c80d8fe073d5cb2e195c5705f398979a3245f5aa08b2539e1ea8fb12c