Dec 11 19:42:10.886 INFO checking dgryski/rust-bf against master#3a75e80557a103497cffbcab395a2f37061a77ea for pr-56677
Dec 11 19:42:10.886 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56677/worker-7/master#3a75e80557a103497cffbcab395a2f37061a77ea:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-7/pr-56677/master#3a75e80557a103497cffbcab395a2f37061a77ea:/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 +3a75e80557a103497cffbcab395a2f37061a77ea-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"`
Dec 11 19:42:11.247 INFO [stdout] cab1683c522bd7c53dccae56a2a5239554ec096327a398fcfd11fac89c15002e
Dec 11 19:42:11.254 INFO running `"docker" "start" "-a" "cab1683c522bd7c53dccae56a2a5239554ec096327a398fcfd11fac89c15002e"`
Dec 11 19:42:12.419 INFO [stderr] usermod: no changes
Dec 11 19:42:12.524 INFO [stderr]     Checking bf v0.1.0 (/source)
Dec 11 19:42:12.952 INFO [stderr] warning: unused variable: `arg1`
Dec 11 19:42:12.952 INFO [stderr]   --> src/main.rs:17:13
Dec 11 19:42:12.952 INFO [stderr]    |
Dec 11 19:42:12.952 INFO [stderr] 17 |     let ref arg1 = args[1];
Dec 11 19:42:12.952 INFO [stderr]    |             ^^^^ help: consider using `_arg1` instead
Dec 11 19:42:12.952 INFO [stderr]    |
Dec 11 19:42:12.952 INFO [stderr]    = note: #[warn(unused_variables)] on by default
Dec 11 19:42:12.952 INFO [stderr] 
Dec 11 19:42:12.972 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 11 19:42:12.972 INFO [stderr]   --> src/main.rs:31:9
Dec 11 19:42:12.972 INFO [stderr]    |
Dec 11 19:42:12.972 INFO [stderr] 31 |         io::stderr().write(err.as_bytes());
Dec 11 19:42:12.972 INFO [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 11 19:42:12.972 INFO [stderr]    |
Dec 11 19:42:12.972 INFO [stderr]    = note: #[warn(unused_must_use)] on by default
Dec 11 19:42:12.972 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 11 19:42:12.972 INFO [stderr] 
Dec 11 19:42:13.088 INFO [stderr] warning: unused variable: `arg1`
Dec 11 19:42:13.088 INFO [stderr]   --> src/main.rs:17:13
Dec 11 19:42:13.088 INFO [stderr]    |
Dec 11 19:42:13.088 INFO [stderr] 17 |     let ref arg1 = args[1];
Dec 11 19:42:13.088 INFO [stderr]    |             ^^^^ help: consider using `_arg1` instead
Dec 11 19:42:13.088 INFO [stderr]    |
Dec 11 19:42:13.088 INFO [stderr]    = note: #[warn(unused_variables)] on by default
Dec 11 19:42:13.088 INFO [stderr] 
Dec 11 19:42:13.110 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 11 19:42:13.110 INFO [stderr]   --> src/main.rs:31:9
Dec 11 19:42:13.110 INFO [stderr]    |
Dec 11 19:42:13.110 INFO [stderr] 31 |         io::stderr().write(err.as_bytes());
Dec 11 19:42:13.110 INFO [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 11 19:42:13.110 INFO [stderr]    |
Dec 11 19:42:13.110 INFO [stderr]    = note: #[warn(unused_must_use)] on by default
Dec 11 19:42:13.110 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 11 19:42:13.110 INFO [stderr] 
Dec 11 19:42:13.123 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.66s
Dec 11 19:42:13.125 INFO [stderr] su: No module specific data is present
Dec 11 19:42:13.566 INFO running `"docker" "inspect" "cab1683c522bd7c53dccae56a2a5239554ec096327a398fcfd11fac89c15002e"`
Dec 11 19:42:13.852 INFO running `"docker" "rm" "-f" "cab1683c522bd7c53dccae56a2a5239554ec096327a398fcfd11fac89c15002e"`
Dec 11 19:42:14.020 INFO [stdout] cab1683c522bd7c53dccae56a2a5239554ec096327a398fcfd11fac89c15002e