[INFO] fetching crate named-item 0.4.0...
[INFO] checking named-item-0.4.0 against master#39cb3386ddc6c71657418be28dbb3987eea4aa4b for pr-133536
[INFO] extracting crate named-item 0.4.0 into /workspace/builds/worker-3-tc1/source
[INFO] validating manifest of crates.io crate named-item 0.4.0 on toolchain 39cb3386ddc6c71657418be28dbb3987eea4aa4b
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+39cb3386ddc6c71657418be28dbb3987eea4aa4b" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate named-item 0.4.0
[INFO] removed 0 missing tests
[INFO] finished tweaking crates.io crate named-item 0.4.0
[INFO] tweaked toml for crates.io crate named-item 0.4.0 written to /workspace/builds/worker-3-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+39cb3386ddc6c71657418be28dbb3987eea4aa4b" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 16 packages to latest compatible versions
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+39cb3386ddc6c71657418be28dbb3987eea4aa4b" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded language-enum v0.1.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/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@sha256:4a844ea9eb2546a2d2c7022eacef16ef2e8229c7fbb2c7d4d55a9ceca922f72d" "/opt/rustwide/cargo-home/bin/cargo" "+39cb3386ddc6c71657418be28dbb3987eea4aa4b" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 6fdc33fc42b3c106e0d901fd84b036bd758c3ccc9f054e63619b8d2608859bf4
[INFO] running `Command { std: "docker" "start" "-a" "6fdc33fc42b3c106e0d901fd84b036bd758c3ccc9f054e63619b8d2608859bf4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "6fdc33fc42b3c106e0d901fd84b036bd758c3ccc9f054e63619b8d2608859bf4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6fdc33fc42b3c106e0d901fd84b036bd758c3ccc9f054e63619b8d2608859bf4", kill_on_drop: false }`
[INFO] [stdout] 6fdc33fc42b3c106e0d901fd84b036bd758c3ccc9f054e63619b8d2608859bf4
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/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@sha256:4a844ea9eb2546a2d2c7022eacef16ef2e8229c7fbb2c7d4d55a9ceca922f72d" "/opt/rustwide/cargo-home/bin/cargo" "+39cb3386ddc6c71657418be28dbb3987eea4aa4b" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] a1c09d136eeaf4a69c164235f471c0e0bd5dc0f08d9c25b901868ca7fabe83e0
[INFO] running `Command { std: "docker" "start" "-a" "a1c09d136eeaf4a69c164235f471c0e0bd5dc0f08d9c25b901868ca7fabe83e0", kill_on_drop: false }`
[INFO] [stderr]     Checking export-magic v0.3.6
[INFO] [stderr]     Checking serde v1.0.215
[INFO] [stderr]     Checking serde_json v1.0.133
[INFO] [stderr]     Checking language-enum v0.1.0
[INFO] [stderr]     Checking named-item v0.4.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0308]: mismatched types
[INFO] [stdout]   --> src/ai_descriptor.rs:45:13
[INFO] [stdout]    |
[INFO] [stdout] 44 |         fn features(&self) -> Vec<Cow<'_, str>> {
[INFO] [stdout]    |                               ----------------- expected `Vec<std::borrow::Cow<'_, str>>` because of return type
[INFO] [stdout] 45 |             &self.features
[INFO] [stdout]    |             ^^^^^^^^^^^^^^ expected `Vec<Cow<'_, str>>`, found `&Vec<Cow<'_, str>>`
[INFO] [stdout]    |
[INFO] [stdout]    = note: expected struct `Vec<std::borrow::Cow<'_, _>>`
[INFO] [stdout]            found reference `&Vec<std::borrow::Cow<'static, _>>`
[INFO] [stdout] help: consider removing the borrow
[INFO] [stdout]    |
[INFO] [stdout] 45 -             &self.features
[INFO] [stdout] 45 +             self.features
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0308`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `named-item` (lib test) due to 1 previous error
[INFO] running `Command { std: "docker" "inspect" "a1c09d136eeaf4a69c164235f471c0e0bd5dc0f08d9c25b901868ca7fabe83e0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a1c09d136eeaf4a69c164235f471c0e0bd5dc0f08d9c25b901868ca7fabe83e0", kill_on_drop: false }`
[INFO] [stdout] a1c09d136eeaf4a69c164235f471c0e0bd5dc0f08d9c25b901868ca7fabe83e0
