Dec 18 11:44:32.654 INFO checking rustc-hex-2.0.1 against master#96d1334e567237b1507cd277938e7ae2de75ff51 for pr-54252
Dec 18 11:44:32.654 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-54252/worker-4/master#96d1334e567237b1507cd277938e7ae2de75ff51:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-54252/sources/master#96d1334e567237b1507cd277938e7ae2de75ff51/reg/rustc-hex/2.0.1:/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" "+96d1334e567237b1507cd277938e7ae2de75ff51-alt" "check" "--frozen" "--all" "--all-targets"`
Dec 18 11:44:33.000 INFO [stdout] a7f480ee91c7b4ae9aec4f3ca9a3b4b3e924721cbfe238fd212d61f7ea28b0f7
Dec 18 11:44:33.002 INFO running `"docker" "start" "-a" "a7f480ee91c7b4ae9aec4f3ca9a3b4b3e924721cbfe238fd212d61f7ea28b0f7"`
Dec 18 11:44:33.737 INFO [stderr]     Checking rustc-hex v2.0.1 (/opt/crater/workdir)
Dec 18 11:44:34.332 INFO [stderr] error[E0283]: type annotations required: cannot resolve `_: std::iter::FromIterator<char>`
Dec 18 11:44:34.332 INFO [stderr]   --> benches/hex.rs:14:22
Dec 18 11:44:34.332 INFO [stderr]    |
Dec 18 11:44:34.332 INFO [stderr] 14 |         s.as_bytes().to_hex();
Dec 18 11:44:34.332 INFO [stderr]    |                      ^^^^^^
Dec 18 11:44:34.332 INFO [stderr] 
Dec 18 11:44:34.332 INFO [stderr] error[E0282]: type annotations needed
Dec 18 11:44:34.332 INFO [stderr]   --> benches/hex.rs:25:9
Dec 18 11:44:34.332 INFO [stderr]    |
Dec 18 11:44:34.332 INFO [stderr] 23 |     let sb = s.as_bytes().to_hex();
Dec 18 11:44:34.332 INFO [stderr]    |         -- consider giving `sb` a type
Dec 18 11:44:34.332 INFO [stderr] 24 |     b.iter(|| {
Dec 18 11:44:34.332 INFO [stderr] 25 |         sb.from_hex().unwrap();
Dec 18 11:44:34.332 INFO [stderr]    |         ^^ cannot infer type
Dec 18 11:44:34.332 INFO [stderr]    |
Dec 18 11:44:34.332 INFO [stderr]    = note: type must be known at this point
Dec 18 11:44:34.332 INFO [stderr] 
Dec 18 11:44:34.332 INFO [stderr] error: aborting due to 2 previous errors
Dec 18 11:44:34.332 INFO [stderr] 
Dec 18 11:44:34.332 INFO [stderr] Some errors occurred: E0282, E0283.
Dec 18 11:44:34.332 INFO [stderr] For more information about an error, try `rustc --explain E0282`.
Dec 18 11:44:34.338 INFO [stderr] error: Could not compile `rustc-hex`.
Dec 18 11:44:34.338 INFO [stderr] 
Dec 18 11:44:34.338 INFO [stderr] To learn more, run the command again with --verbose.
Dec 18 11:44:34.692 INFO running `"docker" "inspect" "a7f480ee91c7b4ae9aec4f3ca9a3b4b3e924721cbfe238fd212d61f7ea28b0f7"`
Dec 18 11:44:34.918 INFO running `"docker" "rm" "-f" "a7f480ee91c7b4ae9aec4f3ca9a3b4b3e924721cbfe238fd212d61f7ea28b0f7"`
Dec 18 11:44:35.086 INFO [stdout] a7f480ee91c7b4ae9aec4f3ca9a3b4b3e924721cbfe238fd212d61f7ea28b0f7