Oct 12 19:49:24.751 INFO checking jfredett/synacor against master#5af0bb83044c3fb43d59ad5f49ee5ae1a293901f for pr-54977
Oct 12 19:49:24.752 INFO running `"docker" "create" "-v" "/mnt/big/crater/./work/local/target-dirs/pr-54977/worker-6/master#5af0bb83044c3fb43d59ad5f49ee5ae1a293901f:/target:rw,Z" "-v" "/mnt/big/crater/./work/local/test-source/worker-6/pr-54977/master#5af0bb83044c3fb43d59ad5f49ee5ae1a293901f:/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 +5af0bb83044c3fb43d59ad5f49ee5ae1a293901f-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"`
Oct 12 19:49:25.158 INFO blam! 169dd0b274e096ba62ce2daa5d95d1b05d91df07f0336800f1d6b0ebfc2f0a7c
Oct 12 19:49:25.159 INFO running `"docker" "start" "-a" "169dd0b274e096ba62ce2daa5d95d1b05d91df07f0336800f1d6b0ebfc2f0a7c"`
Oct 12 19:49:25.840 INFO kablam! usermod: no changes
Oct 12 19:49:25.944 INFO kablam!     Checking synacor v0.1.0 (/source)
Oct 12 19:49:27.472 INFO kablam! warning: unused `std::result::Result` which must be used
Oct 12 19:49:27.472 INFO kablam!    --> src/vm.rs:186:9
Oct 12 19:49:27.472 INFO kablam!     |
Oct 12 19:49:27.472 INFO kablam! 186 |         stdin.read_exact(&mut buf);
Oct 12 19:49:27.472 INFO kablam!     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^
Oct 12 19:49:27.472 INFO kablam!     |
Oct 12 19:49:27.472 INFO kablam!     = note: #[warn(unused_must_use)] on by default
Oct 12 19:49:27.472 INFO kablam!     = note: this `Result` may be an `Err` variant, which should be handled
Oct 12 19:49:27.472 INFO kablam! 
Oct 12 19:49:29.973 INFO kablam! warning: unused arithmetic operation which must be used
Oct 12 19:49:29.973 INFO kablam!    --> src/u15.rs:163:30
Oct 12 19:49:29.973 INFO kablam!     |
Oct 12 19:49:29.973 INFO kablam! 163 |         fn sub_underflow() { u15(0) - u15(2); }
Oct 12 19:49:29.973 INFO kablam!     |                              ^^^^^^^^^^^^^^^
Oct 12 19:49:29.973 INFO kablam!     |
Oct 12 19:49:29.973 INFO kablam!     = note: #[warn(unused_must_use)] on by default
Oct 12 19:49:29.973 INFO kablam! 
Oct 12 19:49:29.973 INFO kablam! warning: unused arithmetic operation which must be used
Oct 12 19:49:29.973 INFO kablam!    --> src/u15.rs:167:28
Oct 12 19:49:29.973 INFO kablam!     |
Oct 12 19:49:29.973 INFO kablam! 167 |         fn div_by_zero() { u15(1) / u15(0); }
Oct 12 19:49:29.973 INFO kablam!     |                            ^^^^^^^^^^^^^^^
Oct 12 19:49:29.973 INFO kablam! 
Oct 12 19:49:29.973 INFO kablam! warning: unused arithmetic operation which must be used
Oct 12 19:49:29.973 INFO kablam!    --> src/u15.rs:223:26
Oct 12 19:49:29.973 INFO kablam!     |
Oct 12 19:49:29.973 INFO kablam! 223 |         fn sub_panic() { u15(16) - u15(17); }
Oct 12 19:49:29.973 INFO kablam!     |                          ^^^^^^^^^^^^^^^^^
Oct 12 19:49:29.973 INFO kablam! 
Oct 12 19:49:30.035 INFO kablam! warning: unused `std::result::Result` which must be used
Oct 12 19:49:30.036 INFO kablam!    --> src/vm.rs:186:9
Oct 12 19:49:30.036 INFO kablam!     |
Oct 12 19:49:30.036 INFO kablam! 186 |         stdin.read_exact(&mut buf);
Oct 12 19:49:30.036 INFO kablam!     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^
Oct 12 19:49:30.036 INFO kablam!     |
Oct 12 19:49:30.037 INFO kablam!     = note: this `Result` may be an `Err` variant, which should be handled
Oct 12 19:49:30.037 INFO kablam! 
Oct 12 19:49:30.109 INFO kablam!     Finished dev [unoptimized + debuginfo] target(s) in 4.23s
Oct 12 19:49:30.113 INFO kablam! su: No module specific data is present
Oct 12 19:49:30.422 INFO running `"docker" "rm" "-f" "169dd0b274e096ba62ce2daa5d95d1b05d91df07f0336800f1d6b0ebfc2f0a7c"`
Oct 12 19:49:30.556 INFO blam! 169dd0b274e096ba62ce2daa5d95d1b05d91df07f0336800f1d6b0ebfc2f0a7c