Dec 19 11:05:36.212 INFO checking peter-bertok/float_fast_print against try#e70472fc501b855c9080f3772432c10fe20b8866 for pr-56955
Dec 19 11:05:36.212 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56955/worker-5/try#e70472fc501b855c9080f3772432c10fe20b8866:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-56955/sources/try#e70472fc501b855c9080f3772432c10fe20b8866/gh/peter-bertok/float_fast_print:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+e70472fc501b855c9080f3772432c10fe20b8866-alt" "check" "--frozen" "--all" "--all-targets"`
Dec 19 11:05:36.672 INFO [stdout] 01e7e3f39046c4e26ac802c631deb3a796a51dfd70837f3793f235721423e43a
Dec 19 11:05:36.672 INFO running `"docker" "start" "-a" "01e7e3f39046c4e26ac802c631deb3a796a51dfd70837f3793f235721423e43a"`
Dec 19 11:05:37.924 INFO [stderr]     Checking float_fast_print v0.1.2 (/opt/crater/workdir)
Dec 19 11:05:39.024 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 11:05:39.024 INFO [stderr]   --> tests/benchmarks.rs:17:9
Dec 19 11:05:39.024 INFO [stderr]    |
Dec 19 11:05:39.025 INFO [stderr] 17 |         write!(&mut buffer, "{:?}", x);
Dec 19 11:05:39.025 INFO [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 11:05:39.025 INFO [stderr]    |
Dec 19 11:05:39.025 INFO [stderr]    = note: #[warn(unused_must_use)] on by default
Dec 19 11:05:39.025 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 11:05:39.025 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 19 11:05:39.025 INFO [stderr] 
Dec 19 11:05:39.025 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 11:05:39.025 INFO [stderr]   --> tests/benchmarks.rs:28:9
Dec 19 11:05:39.025 INFO [stderr]    |
Dec 19 11:05:39.025 INFO [stderr] 28 |         write!(&mut buffer, "{}", x);
Dec 19 11:05:39.025 INFO [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 11:05:39.025 INFO [stderr]    |
Dec 19 11:05:39.025 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 11:05:39.025 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 19 11:05:39.025 INFO [stderr] 
Dec 19 11:05:39.025 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 11:05:39.025 INFO [stderr]   --> tests/benchmarks.rs:39:9
Dec 19 11:05:39.025 INFO [stderr]    |
Dec 19 11:05:39.025 INFO [stderr] 39 |         write!(&mut buffer, "{:?}", x);
Dec 19 11:05:39.025 INFO [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 11:05:39.025 INFO [stderr]    |
Dec 19 11:05:39.025 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 11:05:39.027 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 19 11:05:39.027 INFO [stderr] 
Dec 19 11:05:39.032 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 11:05:39.032 INFO [stderr]   --> tests/benchmarks.rs:50:9
Dec 19 11:05:39.032 INFO [stderr]    |
Dec 19 11:05:39.032 INFO [stderr] 50 |         write!(&mut buffer, "{}", x);
Dec 19 11:05:39.032 INFO [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 11:05:39.032 INFO [stderr]    |
Dec 19 11:05:39.032 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 11:05:39.032 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 19 11:05:39.032 INFO [stderr] 
Dec 19 11:05:39.253 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.40s
Dec 19 11:05:40.360 INFO running `"docker" "inspect" "01e7e3f39046c4e26ac802c631deb3a796a51dfd70837f3793f235721423e43a"`
Dec 19 11:05:40.734 INFO running `"docker" "rm" "-f" "01e7e3f39046c4e26ac802c631deb3a796a51dfd70837f3793f235721423e43a"`
Dec 19 11:05:40.992 INFO [stdout] 01e7e3f39046c4e26ac802c631deb3a796a51dfd70837f3793f235721423e43a