Nov 28 03:22:53.530 INFO checking jfredett/synacor against master#0b9f19dff1347e29bf4362ab5a8fab84b43023b5 for pr-56074
Nov 28 03:22:53.530 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56074/worker-6/master#0b9f19dff1347e29bf4362ab5a8fab84b43023b5:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-6/pr-56074/master#0b9f19dff1347e29bf4362ab5a8fab84b43023b5:/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 +0b9f19dff1347e29bf4362ab5a8fab84b43023b5-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 28 03:22:53.828 INFO [stdout] 92fc9858e6e5a25bc02420b63eef20860880f0a701743702fb4d6d5b013f9df5
Nov 28 03:22:53.834 INFO running `"docker" "start" "-a" "92fc9858e6e5a25bc02420b63eef20860880f0a701743702fb4d6d5b013f9df5"`
Nov 28 03:22:55.008 INFO [stderr] usermod: no changes
Nov 28 03:22:55.169 INFO [stderr]     Checking clap v2.29.0
Nov 28 03:23:02.560 INFO [stderr]     Checking synacor v0.1.0 (/source)
Nov 28 03:23:03.180 INFO [stderr] warning: unused `std::result::Result` that must be used
Nov 28 03:23:03.180 INFO [stderr]    --> src/vm.rs:186:9
Nov 28 03:23:03.180 INFO [stderr]     |
Nov 28 03:23:03.180 INFO [stderr] 186 |         stdin.read_exact(&mut buf);
Nov 28 03:23:03.180 INFO [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^
Nov 28 03:23:03.180 INFO [stderr]     |
Nov 28 03:23:03.180 INFO [stderr]     = note: #[warn(unused_must_use)] on by default
Nov 28 03:23:03.180 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Nov 28 03:23:03.180 INFO [stderr] 
Nov 28 03:23:05.398 INFO [stderr] warning: unused arithmetic operation that must be used
Nov 28 03:23:05.398 INFO [stderr]    --> src/u15.rs:163:30
Nov 28 03:23:05.398 INFO [stderr]     |
Nov 28 03:23:05.398 INFO [stderr] 163 |         fn sub_underflow() { u15(0) - u15(2); }
Nov 28 03:23:05.398 INFO [stderr]     |                              ^^^^^^^^^^^^^^^
Nov 28 03:23:05.398 INFO [stderr]     |
Nov 28 03:23:05.398 INFO [stderr]     = note: #[warn(unused_must_use)] on by default
Nov 28 03:23:05.398 INFO [stderr] 
Nov 28 03:23:05.398 INFO [stderr] warning: unused arithmetic operation that must be used
Nov 28 03:23:05.398 INFO [stderr]    --> src/u15.rs:167:28
Nov 28 03:23:05.398 INFO [stderr]     |
Nov 28 03:23:05.398 INFO [stderr] 167 |         fn div_by_zero() { u15(1) / u15(0); }
Nov 28 03:23:05.398 INFO [stderr]     |                            ^^^^^^^^^^^^^^^
Nov 28 03:23:05.398 INFO [stderr] 
Nov 28 03:23:05.402 INFO [stderr] warning: unused arithmetic operation that must be used
Nov 28 03:23:05.402 INFO [stderr]    --> src/u15.rs:223:26
Nov 28 03:23:05.402 INFO [stderr]     |
Nov 28 03:23:05.402 INFO [stderr] 223 |         fn sub_panic() { u15(16) - u15(17); }
Nov 28 03:23:05.402 INFO [stderr]     |                          ^^^^^^^^^^^^^^^^^
Nov 28 03:23:05.402 INFO [stderr] 
Nov 28 03:23:05.458 INFO [stderr] warning: unused `std::result::Result` that must be used
Nov 28 03:23:05.458 INFO [stderr]    --> src/vm.rs:186:9
Nov 28 03:23:05.458 INFO [stderr]     |
Nov 28 03:23:05.458 INFO [stderr] 186 |         stdin.read_exact(&mut buf);
Nov 28 03:23:05.458 INFO [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^
Nov 28 03:23:05.458 INFO [stderr]     |
Nov 28 03:23:05.458 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Nov 28 03:23:05.458 INFO [stderr] 
Nov 28 03:23:05.552 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 10.50s
Nov 28 03:23:05.560 INFO [stderr] su: No module specific data is present
Nov 28 03:23:06.300 INFO running `"docker" "inspect" "92fc9858e6e5a25bc02420b63eef20860880f0a701743702fb4d6d5b013f9df5"`
Nov 28 03:23:06.621 INFO running `"docker" "rm" "-f" "92fc9858e6e5a25bc02420b63eef20860880f0a701743702fb4d6d5b013f9df5"`
Nov 28 03:23:06.809 INFO [stdout] 92fc9858e6e5a25bc02420b63eef20860880f0a701743702fb4d6d5b013f9df5