Dec 12 14:57:26.137 INFO checking float_fast_print-0.1.2 against master#3a75e80557a103497cffbcab395a2f37061a77ea for pr-56677
Dec 12 14:57:26.137 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56677/worker-4/master#3a75e80557a103497cffbcab395a2f37061a77ea:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-4/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 12 14:57:26.387 INFO [stdout] 51b5520eb39812d3d879e4c8095c9265d644e4d49c0f6fd165ae61df21aa9709
Dec 12 14:57:26.394 INFO running `"docker" "start" "-a" "51b5520eb39812d3d879e4c8095c9265d644e4d49c0f6fd165ae61df21aa9709"`
Dec 12 14:57:27.208 INFO [stderr] usermod: no changes
Dec 12 14:57:27.284 INFO [stderr]     Checking float_fast_print v0.1.2 (/source)
Dec 12 14:57:29.196 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 12 14:57:29.196 INFO [stderr]   --> tests/benchmarks.rs:17:9
Dec 12 14:57:29.196 INFO [stderr]    |
Dec 12 14:57:29.196 INFO [stderr] 17 |         write!(&mut buffer, "{:?}", x);
Dec 12 14:57:29.196 INFO [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 12 14:57:29.196 INFO [stderr]    |
Dec 12 14:57:29.196 INFO [stderr]    = note: #[warn(unused_must_use)] on by default
Dec 12 14:57:29.196 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 12 14:57:29.196 INFO [stderr]    = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
Dec 12 14:57:29.196 INFO [stderr] 
Dec 12 14:57:29.196 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 12 14:57:29.196 INFO [stderr]   --> tests/benchmarks.rs:28:9
Dec 12 14:57:29.196 INFO [stderr]    |
Dec 12 14:57:29.196 INFO [stderr] 28 |         write!(&mut buffer, "{}", x);
Dec 12 14:57:29.196 INFO [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 12 14:57:29.196 INFO [stderr]    |
Dec 12 14:57:29.196 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 12 14:57:29.196 INFO [stderr]    = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
Dec 12 14:57:29.196 INFO [stderr] 
Dec 12 14:57:29.196 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 12 14:57:29.196 INFO [stderr]   --> tests/benchmarks.rs:39:9
Dec 12 14:57:29.196 INFO [stderr]    |
Dec 12 14:57:29.196 INFO [stderr] 39 |         write!(&mut buffer, "{:?}", x);
Dec 12 14:57:29.196 INFO [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 12 14:57:29.196 INFO [stderr]    |
Dec 12 14:57:29.196 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 12 14:57:29.196 INFO [stderr]    = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
Dec 12 14:57:29.196 INFO [stderr] 
Dec 12 14:57:29.196 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 12 14:57:29.196 INFO [stderr]   --> tests/benchmarks.rs:50:9
Dec 12 14:57:29.196 INFO [stderr]    |
Dec 12 14:57:29.196 INFO [stderr] 50 |         write!(&mut buffer, "{}", x);
Dec 12 14:57:29.196 INFO [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 12 14:57:29.196 INFO [stderr]    |
Dec 12 14:57:29.196 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 12 14:57:29.196 INFO [stderr]    = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
Dec 12 14:57:29.196 INFO [stderr] 
Dec 12 14:57:29.405 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.17s
Dec 12 14:57:29.417 INFO [stderr] su: No module specific data is present
Dec 12 14:57:30.102 INFO running `"docker" "inspect" "51b5520eb39812d3d879e4c8095c9265d644e4d49c0f6fd165ae61df21aa9709"`
Dec 12 14:57:30.292 INFO running `"docker" "rm" "-f" "51b5520eb39812d3d879e4c8095c9265d644e4d49c0f6fd165ae61df21aa9709"`
Dec 12 14:57:30.443 INFO [stdout] 51b5520eb39812d3d879e4c8095c9265d644e4d49c0f6fd165ae61df21aa9709