Nov 30 00:59:22.093 INFO checking jfredett/synacor against try#32252761328f59ccfadb1bafb8148c685bc830b3 for pr-56323
Nov 30 00:59:22.093 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56323/worker-6/try#32252761328f59ccfadb1bafb8148c685bc830b3:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-6/pr-56323/try#32252761328f59ccfadb1bafb8148c685bc830b3:/source:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/source" "-e" "USER_ID=1000" "-e" "CMD=cargo +32252761328f59ccfadb1bafb8148c685bc830b3-alt check --frozen --all --all-targets" "-e" "CARGO_TARGET_DIR=/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/cargo-home" "-e" "RUSTUP_HOME=/rustup-home" "-m" "1536M" "--network" "none" "crater"`
Nov 30 00:59:22.276 INFO [stdout] 9809af75b527d8b24db32c42b8234569de8ebea8c19de3e547722aa16692167b
Nov 30 00:59:22.278 INFO running `"docker" "start" "-a" "9809af75b527d8b24db32c42b8234569de8ebea8c19de3e547722aa16692167b"`
Nov 30 00:59:22.844 INFO [stderr] usermod: no changes
Nov 30 00:59:22.908 INFO [stderr]     Checking synacor v0.1.0 (/source)
Nov 30 00:59:23.692 INFO [stderr] warning: unused `std::result::Result` that must be used
Nov 30 00:59:23.692 INFO [stderr]    --> src/vm.rs:186:9
Nov 30 00:59:23.692 INFO [stderr]     |
Nov 30 00:59:23.692 INFO [stderr] 186 |         stdin.read_exact(&mut buf);
Nov 30 00:59:23.692 INFO [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^
Nov 30 00:59:23.692 INFO [stderr]     |
Nov 30 00:59:23.692 INFO [stderr]     = note: #[warn(unused_must_use)] on by default
Nov 30 00:59:23.692 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Nov 30 00:59:23.692 INFO [stderr] 
Nov 30 00:59:27.088 INFO [stderr] warning: unused arithmetic operation that must be used
Nov 30 00:59:27.088 INFO [stderr]    --> src/u15.rs:163:30
Nov 30 00:59:27.088 INFO [stderr]     |
Nov 30 00:59:27.088 INFO [stderr] 163 |         fn sub_underflow() { u15(0) - u15(2); }
Nov 30 00:59:27.088 INFO [stderr]     |                              ^^^^^^^^^^^^^^^
Nov 30 00:59:27.088 INFO [stderr]     |
Nov 30 00:59:27.088 INFO [stderr]     = note: #[warn(unused_must_use)] on by default
Nov 30 00:59:27.088 INFO [stderr] 
Nov 30 00:59:27.088 INFO [stderr] warning: unused arithmetic operation that must be used
Nov 30 00:59:27.088 INFO [stderr]    --> src/u15.rs:167:28
Nov 30 00:59:27.088 INFO [stderr]     |
Nov 30 00:59:27.088 INFO [stderr] 167 |         fn div_by_zero() { u15(1) / u15(0); }
Nov 30 00:59:27.088 INFO [stderr]     |                            ^^^^^^^^^^^^^^^
Nov 30 00:59:27.088 INFO [stderr] 
Nov 30 00:59:27.092 INFO [stderr] warning: unused arithmetic operation that must be used
Nov 30 00:59:27.092 INFO [stderr]    --> src/u15.rs:223:26
Nov 30 00:59:27.092 INFO [stderr]     |
Nov 30 00:59:27.092 INFO [stderr] 223 |         fn sub_panic() { u15(16) - u15(17); }
Nov 30 00:59:27.092 INFO [stderr]     |                          ^^^^^^^^^^^^^^^^^
Nov 30 00:59:27.092 INFO [stderr] 
Nov 30 00:59:27.148 INFO [stderr] warning: unused `std::result::Result` that must be used
Nov 30 00:59:27.148 INFO [stderr]    --> src/vm.rs:186:9
Nov 30 00:59:27.148 INFO [stderr]     |
Nov 30 00:59:27.148 INFO [stderr] 186 |         stdin.read_exact(&mut buf);
Nov 30 00:59:27.148 INFO [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^
Nov 30 00:59:27.148 INFO [stderr]     |
Nov 30 00:59:27.148 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Nov 30 00:59:27.148 INFO [stderr] 
Nov 30 00:59:27.202 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 4.33s
Nov 30 00:59:27.206 INFO [stderr] su: No module specific data is present
Nov 30 00:59:27.831 INFO running `"docker" "inspect" "9809af75b527d8b24db32c42b8234569de8ebea8c19de3e547722aa16692167b"`
Nov 30 00:59:27.930 INFO running `"docker" "rm" "-f" "9809af75b527d8b24db32c42b8234569de8ebea8c19de3e547722aa16692167b"`
Nov 30 00:59:28.041 INFO [stdout] 9809af75b527d8b24db32c42b8234569de8ebea8c19de3e547722aa16692167b