[INFO] fetching crate rustc-hex 2.1.0...
[INFO] checking rustc-hex-2.1.0 against try#998b6603a58e47f42ccce7a67943234e96b6839e for pr-143170
[INFO] extracting crate rustc-hex 2.1.0 into /workspace/builds/worker-0-tc2/source
[INFO] started tweaking crates.io crate rustc-hex 2.1.0
[INFO] finished tweaking crates.io crate rustc-hex 2.1.0
[INFO] tweaked toml for crates.io crate rustc-hex 2.1.0 written to /workspace/builds/worker-0-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate rustc-hex 2.1.0 on toolchain 998b6603a58e47f42ccce7a67943234e96b6839e
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+998b6603a58e47f42ccce7a67943234e96b6839e" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+998b6603a58e47f42ccce7a67943234e96b6839e" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+998b6603a58e47f42ccce7a67943234e96b6839e" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+998b6603a58e47f42ccce7a67943234e96b6839e" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 0bfaaef3ab5c7f5d001501f9a4e2332affced225b735f48e5404a3bbcc6e997f
[INFO] running `Command { std: "docker" "start" "-a" "0bfaaef3ab5c7f5d001501f9a4e2332affced225b735f48e5404a3bbcc6e997f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "0bfaaef3ab5c7f5d001501f9a4e2332affced225b735f48e5404a3bbcc6e997f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0bfaaef3ab5c7f5d001501f9a4e2332affced225b735f48e5404a3bbcc6e997f", kill_on_drop: false }`
[INFO] [stdout] 0bfaaef3ab5c7f5d001501f9a4e2332affced225b735f48e5404a3bbcc6e997f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+998b6603a58e47f42ccce7a67943234e96b6839e" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 15e697810632c25111a8ead98c5e9f6a09102db9382525d5711046d6106f8acd
[INFO] running `Command { std: "docker" "start" "-a" "15e697810632c25111a8ead98c5e9f6a09102db9382525d5711046d6106f8acd", kill_on_drop: false }`
[INFO] [stderr]     Checking rustc-hex v2.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0283]: type annotations needed
[INFO] [stdout]   --> benches/hex.rs:14:22
[INFO] [stdout]    |
[INFO] [stdout] 14 |         s.as_bytes().to_hex();
[INFO] [stdout]    |                      ^^^^^^ cannot infer type of the type parameter `T` declared on the method `to_hex`
[INFO] [stdout]    |
[INFO] [stdout]    = note: multiple `impl`s satisfying `_: FromIterator<char>` found in the `alloc` crate:
[INFO] [stdout]            - impl FromIterator<char> for Box<str>;
[INFO] [stdout]            - impl FromIterator<char> for ByteString;
[INFO] [stdout]            - impl FromIterator<char> for String;
[INFO] [stdout] note: required by a bound in `to_hex`
[INFO] [stdout]   --> /opt/rustwide/workdir/src/lib.rs:25:18
[INFO] [stdout]    |
[INFO] [stdout] 25 |     fn to_hex<T: FromIterator<char>>(&self) -> T;
[INFO] [stdout]    |                  ^^^^^^^^^^^^^^^^^^ required by this bound in `ToHex::to_hex`
[INFO] [stdout] help: consider specifying the generic argument
[INFO] [stdout]    |
[INFO] [stdout] 14 |         s.as_bytes().to_hex::<T>();
[INFO] [stdout]    |                            +++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0282]: type annotations needed
[INFO] [stdout]   --> benches/hex.rs:23:9
[INFO] [stdout]    |
[INFO] [stdout] 23 |     let sb = s.as_bytes().to_hex();
[INFO] [stdout]    |         ^^
[INFO] [stdout] 24 |     b.iter(|| {
[INFO] [stdout] 25 |         sb.from_hex().unwrap();
[INFO] [stdout]    |         -- type must be known at this point
[INFO] [stdout]    |
[INFO] [stdout] help: consider giving `sb` an explicit type
[INFO] [stdout]    |
[INFO] [stdout] 23 |     let sb: /* Type */ = s.as_bytes().to_hex();
[INFO] [stdout]    |           ++++++++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0282, E0283.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0282`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `rustc-hex` (bench "hex") due to 2 previous errors
[INFO] running `Command { std: "docker" "inspect" "15e697810632c25111a8ead98c5e9f6a09102db9382525d5711046d6106f8acd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "15e697810632c25111a8ead98c5e9f6a09102db9382525d5711046d6106f8acd", kill_on_drop: false }`
[INFO] [stdout] 15e697810632c25111a8ead98c5e9f6a09102db9382525d5711046d6106f8acd