[INFO] updating cached repository jfredett/synacor
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/jfredett/synacor
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/jfredett/synacor" "work/ex/pr-56896/sources/master#adbfec229ce07ff4b2a7bf2d6dec2d13cb224980/gh/jfredett/synacor"`
[INFO] [stderr] Cloning into 'work/ex/pr-56896/sources/master#adbfec229ce07ff4b2a7bf2d6dec2d13cb224980/gh/jfredett/synacor'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/jfredett/synacor" "work/ex/pr-56896/sources/try#bad365140e1e8233b42b21af70a407f14ce5fec5/gh/jfredett/synacor"`
[INFO] [stderr] Cloning into 'work/ex/pr-56896/sources/try#bad365140e1e8233b42b21af70a407f14ce5fec5/gh/jfredett/synacor'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] c913dcb7075022f423ac8e42bd1e0c16f5fd1ac7
[INFO] sha for GitHub repo jfredett/synacor: c913dcb7075022f423ac8e42bd1e0c16f5fd1ac7
[INFO] validating manifest of jfredett/synacor on toolchain master#adbfec229ce07ff4b2a7bf2d6dec2d13cb224980
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+adbfec229ce07ff4b2a7bf2d6dec2d13cb224980-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of jfredett/synacor on toolchain try#bad365140e1e8233b42b21af70a407f14ce5fec5
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+bad365140e1e8233b42b21af70a407f14ce5fec5-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing jfredett/synacor
[INFO] finished frobbing jfredett/synacor
[INFO] frobbed toml for jfredett/synacor written to work/ex/pr-56896/sources/master#adbfec229ce07ff4b2a7bf2d6dec2d13cb224980/gh/jfredett/synacor/Cargo.toml
[INFO] started frobbing jfredett/synacor
[INFO] finished frobbing jfredett/synacor
[INFO] frobbed toml for jfredett/synacor written to work/ex/pr-56896/sources/try#bad365140e1e8233b42b21af70a407f14ce5fec5/gh/jfredett/synacor/Cargo.toml
[INFO] crate jfredett/synacor has a lockfile. skipping
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+adbfec229ce07ff4b2a7bf2d6dec2d13cb224980-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+bad365140e1e8233b42b21af70a407f14ce5fec5-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking jfredett/synacor against try#bad365140e1e8233b42b21af70a407f14ce5fec5 for pr-56896
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56896/worker-1/try#bad365140e1e8233b42b21af70a407f14ce5fec5:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-56896/sources/try#bad365140e1e8233b42b21af70a407f14ce5fec5/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" "+bad365140e1e8233b42b21af70a407f14ce5fec5-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 003e12971b2516311b91eee61c5cb2a4dc4ad079b60df29bede9e300b77f7a38
[INFO] running `"docker" "start" "-a" "003e12971b2516311b91eee61c5cb2a4dc4ad079b60df29bede9e300b77f7a38"`
[INFO] [stderr]     Checking synacor v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: use of deprecated item 'core::str::<impl str>::trim_left_matches': superseded by `trim_start_matches`
[INFO] [stderr]   --> src/address.rs:45:41
[INFO] [stderr]    |
[INFO] [stderr] 45 |             let v_res = u16::from_str(s.trim_left_matches("@"));
[INFO] [stderr]    |                                         ^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(deprecated)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/vm.rs:186:9
[INFO] [stderr]     |
[INFO] [stderr] 186 |         stdin.read_exact(&mut buf);
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(unused_must_use)] on by default
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'core::str::<impl str>::trim_left_matches': superseded by `trim_start_matches`
[INFO] [stderr]   --> src/address.rs:45:41
[INFO] [stderr]    |
[INFO] [stderr] 45 |             let v_res = u16::from_str(s.trim_left_matches("@"));
[INFO] [stderr]    |                                         ^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(deprecated)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused arithmetic operation that must be used
[INFO] [stderr]    --> src/u15.rs:163:30
[INFO] [stderr]     |
[INFO] [stderr] 163 |         fn sub_underflow() { u15(0) - u15(2); }
[INFO] [stderr]     |                              ^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(unused_must_use)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused arithmetic operation that must be used
[INFO] [stderr]    --> src/u15.rs:167:28
[INFO] [stderr]     |
[INFO] [stderr] 167 |         fn div_by_zero() { u15(1) / u15(0); }
[INFO] [stderr]     |                            ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused arithmetic operation that must be used
[INFO] [stderr]    --> src/u15.rs:223:26
[INFO] [stderr]     |
[INFO] [stderr] 223 |         fn sub_panic() { u15(16) - u15(17); }
[INFO] [stderr]     |                          ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/vm.rs:186:9
[INFO] [stderr]     |
[INFO] [stderr] 186 |         stdin.read_exact(&mut buf);
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 3.93s
[INFO] running `"docker" "inspect" "003e12971b2516311b91eee61c5cb2a4dc4ad079b60df29bede9e300b77f7a38"`
[INFO] running `"docker" "rm" "-f" "003e12971b2516311b91eee61c5cb2a4dc4ad079b60df29bede9e300b77f7a38"`
[INFO] [stdout] 003e12971b2516311b91eee61c5cb2a4dc4ad079b60df29bede9e300b77f7a38