Nov 01 03:15:43.730 INFO checking jfredett/synacor against master#05812fa8c588473f03e3fa7cf59cd84f4f37c715 for pr-55538
Nov 01 03:15:43.731 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-55538/worker-4/master#05812fa8c588473f03e3fa7cf59cd84f4f37c715:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-4/pr-55538/master#05812fa8c588473f03e3fa7cf59cd84f4f37c715:/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 +05812fa8c588473f03e3fa7cf59cd84f4f37c715-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 01 03:15:43.924 INFO blam! 0fbc0b2978924598f912d45e162015decf86236a26e203acbe902ae474c2fed8
Nov 01 03:15:43.926 INFO running `"docker" "start" "-a" "0fbc0b2978924598f912d45e162015decf86236a26e203acbe902ae474c2fed8"`
Nov 01 03:15:44.306 INFO kablam! usermod: no changes
Nov 01 03:15:44.367 INFO kablam!     Checking atty v0.2.3
Nov 01 03:15:44.659 INFO kablam!     Checking clap v2.29.0
Nov 01 03:15:51.933 INFO kablam!     Checking synacor v0.1.0 (/source)
Nov 01 03:15:53.612 INFO kablam! warning: unused `std::result::Result` that must be used
Nov 01 03:15:53.613 INFO kablam!    --> src/vm.rs:186:9
Nov 01 03:15:53.613 INFO kablam!     |
Nov 01 03:15:53.613 INFO kablam! 186 |         stdin.read_exact(&mut buf);
Nov 01 03:15:53.613 INFO kablam!     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^
Nov 01 03:15:53.613 INFO kablam!     |
Nov 01 03:15:53.613 INFO kablam!     = note: #[warn(unused_must_use)] on by default
Nov 01 03:15:53.613 INFO kablam!     = note: this `Result` may be an `Err` variant, which should be handled
Nov 01 03:15:53.613 INFO kablam! 
Nov 01 03:15:58.017 INFO kablam! warning: unused arithmetic operation that must be used
Nov 01 03:15:58.017 INFO kablam!    --> src/u15.rs:163:30
Nov 01 03:15:58.017 INFO kablam!     |
Nov 01 03:15:58.018 INFO kablam! 163 |         fn sub_underflow() { u15(0) - u15(2); }
Nov 01 03:15:58.018 INFO kablam!     |                              ^^^^^^^^^^^^^^^
Nov 01 03:15:58.018 INFO kablam!     |
Nov 01 03:15:58.018 INFO kablam!     = note: #[warn(unused_must_use)] on by default
Nov 01 03:15:58.019 INFO kablam! 
Nov 01 03:15:58.019 INFO kablam! warning: unused arithmetic operation that must be used
Nov 01 03:15:58.019 INFO kablam!    --> src/u15.rs:167:28
Nov 01 03:15:58.019 INFO kablam!     |
Nov 01 03:15:58.020 INFO kablam! 167 |         fn div_by_zero() { u15(1) / u15(0); }
Nov 01 03:15:58.020 INFO kablam!     |                            ^^^^^^^^^^^^^^^
Nov 01 03:15:58.020 INFO kablam! 
Nov 01 03:15:58.024 INFO kablam! warning: unused arithmetic operation that must be used
Nov 01 03:15:58.025 INFO kablam!    --> src/u15.rs:223:26
Nov 01 03:15:58.025 INFO kablam!     |
Nov 01 03:15:58.025 INFO kablam! 223 |         fn sub_panic() { u15(16) - u15(17); }
Nov 01 03:15:58.026 INFO kablam!     |                          ^^^^^^^^^^^^^^^^^
Nov 01 03:15:58.026 INFO kablam! 
Nov 01 03:15:58.097 INFO kablam! warning: unused `std::result::Result` that must be used
Nov 01 03:15:58.097 INFO kablam!    --> src/vm.rs:186:9
Nov 01 03:15:58.097 INFO kablam!     |
Nov 01 03:15:58.098 INFO kablam! 186 |         stdin.read_exact(&mut buf);
Nov 01 03:15:58.098 INFO kablam!     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^
Nov 01 03:15:58.098 INFO kablam!     |
Nov 01 03:15:58.098 INFO kablam!     = note: this `Result` may be an `Err` variant, which should be handled
Nov 01 03:15:58.099 INFO kablam! 
Nov 01 03:15:58.215 INFO kablam!     Finished dev [unoptimized + debuginfo] target(s) in 13.88s
Nov 01 03:15:58.221 INFO kablam! su: No module specific data is present
Nov 01 03:15:59.449 INFO running `"docker" "rm" "-f" "0fbc0b2978924598f912d45e162015decf86236a26e203acbe902ae474c2fed8"`
Nov 01 03:15:59.820 INFO blam! 0fbc0b2978924598f912d45e162015decf86236a26e203acbe902ae474c2fed8