[INFO] crate rustc-hex 2.0.1 is already in cache
[INFO] extracting crate rustc-hex 2.0.1 into work/ex/pr-60162/sources/master#a850a426491e14186af2250549bf41256b5938d2/reg/rustc-hex/2.0.1
[INFO] extracting crate rustc-hex 2.0.1 into work/ex/pr-60162/sources/try#06a150c7d11500b41499224f165e9de1de096768/reg/rustc-hex/2.0.1
[INFO] validating manifest of rustc-hex-2.0.1 on toolchain master#a850a426491e14186af2250549bf41256b5938d2
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+a850a426491e14186af2250549bf41256b5938d2-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of rustc-hex-2.0.1 on toolchain try#06a150c7d11500b41499224f165e9de1de096768
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+06a150c7d11500b41499224f165e9de1de096768-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing rustc-hex-2.0.1
[INFO] finished frobbing rustc-hex-2.0.1
[INFO] frobbed toml for rustc-hex-2.0.1 written to work/ex/pr-60162/sources/master#a850a426491e14186af2250549bf41256b5938d2/reg/rustc-hex/2.0.1/Cargo.toml
[INFO] started frobbing rustc-hex-2.0.1
[INFO] finished frobbing rustc-hex-2.0.1
[INFO] frobbed toml for rustc-hex-2.0.1 written to work/ex/pr-60162/sources/try#06a150c7d11500b41499224f165e9de1de096768/reg/rustc-hex/2.0.1/Cargo.toml
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+a850a426491e14186af2250549bf41256b5938d2-alt" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+06a150c7d11500b41499224f165e9de1de096768-alt" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+a850a426491e14186af2250549bf41256b5938d2-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+06a150c7d11500b41499224f165e9de1de096768-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking rustc-hex-2.0.1 against master#a850a426491e14186af2250549bf41256b5938d2 for pr-60162
[INFO] running `"docker" "create" "-v" "/mnt/crater-raid/crater/work/local/target-dirs/pr-60162/worker-3/master#a850a426491e14186af2250549bf41256b5938d2:/opt/crater/target:rw,Z" "-v" "/mnt/crater-raid/crater/work/ex/pr-60162/sources/master#a850a426491e14186af2250549bf41256b5938d2/reg/rustc-hex/2.0.1:/opt/crater/workdir:ro,Z" "-v" "/mnt/crater-raid/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/crater-raid/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" "+a850a426491e14186af2250549bf41256b5938d2-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] f66dcfc9a1471bce7852668c8e7b84f0728e9e13896ba8b89626ff0ef4cdd402
[INFO] running `"docker" "start" "-a" "f66dcfc9a1471bce7852668c8e7b84f0728e9e13896ba8b89626ff0ef4cdd402"`
[INFO] [stderr]     Checking rustc-hex v2.0.1 (/opt/crater/workdir)
[INFO] [stderr] error[E0283]: type annotations required: cannot resolve `_: std::iter::FromIterator<char>`
[INFO] [stderr]   --> benches/hex.rs:14:22
[INFO] [stderr]    |
[INFO] [stderr] 14 |         s.as_bytes().to_hex();
[INFO] [stderr]    |                      ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0282]: type annotations needed
[INFO] [stderr]   --> benches/hex.rs:25:9
[INFO] [stderr]    |
[INFO] [stderr] 23 |     let sb = s.as_bytes().to_hex();
[INFO] [stderr]    |         -- consider giving `sb` a type
[INFO] [stderr] 24 |     b.iter(|| {
[INFO] [stderr] 25 |         sb.from_hex().unwrap();
[INFO] [stderr]    |         ^^ cannot infer type
[INFO] [stderr]    |
[INFO] [stderr]    = note: type must be known at this point
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `FromHex`
[INFO] [stderr]  --> benches/hex.rs:7:11
[INFO] [stderr]   |
[INFO] [stderr] 7 | use hex::{FromHex, ToHex};
[INFO] [stderr]   |           ^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 2 previous errors
[INFO] [stderr] 
[INFO] [stderr] Some errors have detailed explanations: E0282, E0283.
[INFO] [stderr] For more information about an error, try `rustc --explain E0282`.
[INFO] [stderr] error: Could not compile `rustc-hex`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "f66dcfc9a1471bce7852668c8e7b84f0728e9e13896ba8b89626ff0ef4cdd402"`
[INFO] running `"docker" "rm" "-f" "f66dcfc9a1471bce7852668c8e7b84f0728e9e13896ba8b89626ff0ef4cdd402"`
[INFO] [stdout] f66dcfc9a1471bce7852668c8e7b84f0728e9e13896ba8b89626ff0ef4cdd402