Dec 12 08:13:53.341 INFO checking rustc-hex-2.0.1 against try#aa9aa79c3c583aab59ac9134542d60a780c35e2e for pr-56677
Dec 12 08:13:53.341 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56677/worker-7/try#aa9aa79c3c583aab59ac9134542d60a780c35e2e:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-7/pr-56677/try#aa9aa79c3c583aab59ac9134542d60a780c35e2e:/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 +aa9aa79c3c583aab59ac9134542d60a780c35e2e-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 08:13:53.776 INFO [stdout] 12bb1b8aa18185ee47b527d091422dbc4c05094e0d3e598f851f80daa032821a
Dec 12 08:13:53.784 INFO running `"docker" "start" "-a" "12bb1b8aa18185ee47b527d091422dbc4c05094e0d3e598f851f80daa032821a"`
Dec 12 08:13:55.079 INFO [stderr] usermod: no changes
Dec 12 08:13:55.135 INFO [stderr]     Checking rustc-hex v2.0.1 (/source)
Dec 12 08:13:56.661 INFO [stderr] error[E0283]: type annotations required: cannot resolve `_: std::iter::FromIterator<char>`
Dec 12 08:13:56.661 INFO [stderr]   --> benches/hex.rs:14:22
Dec 12 08:13:56.661 INFO [stderr]    |
Dec 12 08:13:56.661 INFO [stderr] 14 |         s.as_bytes().to_hex();
Dec 12 08:13:56.661 INFO [stderr]    |                      ^^^^^^
Dec 12 08:13:56.661 INFO [stderr] 
Dec 12 08:13:56.661 INFO [stderr] error[E0282]: type annotations needed
Dec 12 08:13:56.661 INFO [stderr]   --> benches/hex.rs:25:9
Dec 12 08:13:56.661 INFO [stderr]    |
Dec 12 08:13:56.661 INFO [stderr] 23 |     let sb = s.as_bytes().to_hex();
Dec 12 08:13:56.661 INFO [stderr]    |         -- consider giving `sb` a type
Dec 12 08:13:56.661 INFO [stderr] 24 |     b.iter(|| {
Dec 12 08:13:56.661 INFO [stderr] 25 |         sb.from_hex().unwrap();
Dec 12 08:13:56.661 INFO [stderr]    |         ^^ cannot infer type
Dec 12 08:13:56.661 INFO [stderr]    |
Dec 12 08:13:56.661 INFO [stderr]    = note: type must be known at this point
Dec 12 08:13:56.662 INFO [stderr] 
Dec 12 08:13:56.663 INFO [stderr] error: aborting due to 2 previous errors
Dec 12 08:13:56.663 INFO [stderr] 
Dec 12 08:13:56.663 INFO [stderr] Some errors occurred: E0282, E0283.
Dec 12 08:13:56.663 INFO [stderr] For more information about an error, try `rustc --explain E0282`.
Dec 12 08:13:56.669 INFO [stderr] error: Could not compile `rustc-hex`.
Dec 12 08:13:56.670 INFO [stderr] 
Dec 12 08:13:56.670 INFO [stderr] To learn more, run the command again with --verbose.
Dec 12 08:13:56.671 INFO [stderr] su: No module specific data is present
Dec 12 08:13:57.008 INFO running `"docker" "inspect" "12bb1b8aa18185ee47b527d091422dbc4c05094e0d3e598f851f80daa032821a"`
Dec 12 08:13:57.236 INFO running `"docker" "rm" "-f" "12bb1b8aa18185ee47b527d091422dbc4c05094e0d3e598f851f80daa032821a"`
Dec 12 08:13:57.372 INFO [stdout] 12bb1b8aa18185ee47b527d091422dbc4c05094e0d3e598f851f80daa032821a