Oct 13 09:14:31.451 INFO checking rustc-hex-2.0.1 against try#4021bd0b3c5815b087d6db10ce461e7e4854ade7 for pr-54977
Oct 13 09:14:31.451 INFO running `"docker" "create" "-v" "/mnt/big/crater/./work/local/target-dirs/pr-54977/worker-5/try#4021bd0b3c5815b087d6db10ce461e7e4854ade7:/target:rw,Z" "-v" "/mnt/big/crater/./work/local/test-source/worker-5/pr-54977/try#4021bd0b3c5815b087d6db10ce461e7e4854ade7:/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 +4021bd0b3c5815b087d6db10ce461e7e4854ade7-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 13 09:14:31.816 INFO blam! 122f105267fee147c6aacd6a0c3855ae26ce829d685a71ae6952f9be341f4a97
Oct 13 09:14:31.822 INFO running `"docker" "start" "-a" "122f105267fee147c6aacd6a0c3855ae26ce829d685a71ae6952f9be341f4a97"`
Oct 13 09:14:32.880 INFO kablam! usermod: no changes
Oct 13 09:14:32.928 INFO kablam!     Checking rustc-hex v2.0.1 (/source)
Oct 13 09:14:34.827 INFO kablam! error[E0283]: type annotations required: cannot resolve `_: std::iter::FromIterator<char>`
Oct 13 09:14:34.827 INFO kablam!   --> benches/hex.rs:14:22
Oct 13 09:14:34.827 INFO kablam!    |
Oct 13 09:14:34.827 INFO kablam! 14 |         s.as_bytes().to_hex();
Oct 13 09:14:34.827 INFO kablam!    |                      ^^^^^^
Oct 13 09:14:34.827 INFO kablam! 
Oct 13 09:14:34.827 INFO kablam! error[E0282]: type annotations needed
Oct 13 09:14:34.827 INFO kablam!   --> benches/hex.rs:25:9
Oct 13 09:14:34.827 INFO kablam!    |
Oct 13 09:14:34.827 INFO kablam! 23 |     let sb = s.as_bytes().to_hex();
Oct 13 09:14:34.827 INFO kablam!    |         -- consider giving `sb` a type
Oct 13 09:14:34.827 INFO kablam! 24 |     b.iter(|| {
Oct 13 09:14:34.827 INFO kablam! 25 |         sb.from_hex().unwrap();
Oct 13 09:14:34.827 INFO kablam!    |         ^^ cannot infer type
Oct 13 09:14:34.827 INFO kablam!    |
Oct 13 09:14:34.827 INFO kablam!    = note: type must be known at this point
Oct 13 09:14:34.827 INFO kablam! 
Oct 13 09:14:34.827 INFO kablam! error: aborting due to 2 previous errors
Oct 13 09:14:34.827 INFO kablam! 
Oct 13 09:14:34.827 INFO kablam! Some errors occurred: E0282, E0283.
Oct 13 09:14:34.828 INFO kablam! For more information about an error, try `rustc --explain E0282`.
Oct 13 09:14:34.831 INFO kablam! error: Could not compile `rustc-hex`.
Oct 13 09:14:34.831 INFO kablam! 
Oct 13 09:14:34.831 INFO kablam! To learn more, run the command again with --verbose.
Oct 13 09:14:34.831 INFO kablam! su: No module specific data is present
Oct 13 09:14:35.381 INFO running `"docker" "rm" "-f" "122f105267fee147c6aacd6a0c3855ae26ce829d685a71ae6952f9be341f4a97"`
Oct 13 09:14:35.645 INFO blam! 122f105267fee147c6aacd6a0c3855ae26ce829d685a71ae6952f9be341f4a97