[INFO] cloning repository https://github.com/u3kw/minigrep [INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/u3kw/minigrep" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fu3kw%2Fminigrep", kill_on_drop: false }` [INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fu3kw%2Fminigrep'... [INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }` [INFO] [stdout] c6ee156c16d922c6fb552952bc04f970881d5dc3 [INFO] checking u3kw/minigrep against master#2a023bf80a6fbd6a06d5460a34eb247b986286ed for pr-143764 [INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fu3kw%2Fminigrep" "/workspace/builds/worker-5-tc1/source", kill_on_drop: false }` [INFO] [stderr] Cloning into '/workspace/builds/worker-5-tc1/source'... [INFO] [stderr] done. [INFO] started tweaking git repo https://github.com/u3kw/minigrep [INFO] finished tweaking git repo https://github.com/u3kw/minigrep [INFO] tweaked toml for git repo https://github.com/u3kw/minigrep written to /workspace/builds/worker-5-tc1/source/Cargo.toml [INFO] validating manifest of git repo https://github.com/u3kw/minigrep on toolchain 2a023bf80a6fbd6a06d5460a34eb247b986286ed [INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+2a023bf80a6fbd6a06d5460a34eb247b986286ed" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }` [INFO] crate git repo https://github.com/u3kw/minigrep already has a lockfile, it will not be regenerated [INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+2a023bf80a6fbd6a06d5460a34eb247b986286ed" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+2a023bf80a6fbd6a06d5460a34eb247b986286ed" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }` [INFO] [stdout] e913f0a38c0c2b5dcef7fbb2b5dc3d830fa14bedd74865d31faf844cbd777bf0 [INFO] running `Command { std: "docker" "start" "-a" "e913f0a38c0c2b5dcef7fbb2b5dc3d830fa14bedd74865d31faf844cbd777bf0", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "e913f0a38c0c2b5dcef7fbb2b5dc3d830fa14bedd74865d31faf844cbd777bf0", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "e913f0a38c0c2b5dcef7fbb2b5dc3d830fa14bedd74865d31faf844cbd777bf0", kill_on_drop: false }` [INFO] [stdout] e913f0a38c0c2b5dcef7fbb2b5dc3d830fa14bedd74865d31faf844cbd777bf0 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+2a023bf80a6fbd6a06d5460a34eb247b986286ed" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] becb410d7d48563c3566d931ee0d5f62b48c0fc4d6ad3ade62615a21fcf5e477 [INFO] running `Command { std: "docker" "start" "-a" "becb410d7d48563c3566d931ee0d5f62b48c0fc4d6ad3ade62615a21fcf5e477", kill_on_drop: false }` [INFO] [stderr] Checking minigrep v0.1.0 (/opt/rustwide/workdir) [INFO] [stdout] warning: unused import: `std::str::pattern::Pattern` [INFO] [stdout] --> src/lib.rs:4:5 [INFO] [stdout] | [INFO] [stdout] 4 | use std::str::pattern::Pattern; [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_imports)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error[E0658]: use of unstable library feature `pattern`: API not fully fleshed out and ready to be stabilized [INFO] [stdout] --> src/lib.rs:4:5 [INFO] [stdout] | [INFO] [stdout] 4 | use std::str::pattern::Pattern; [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: see issue #27721 for more information [INFO] [stdout] = help: add `#![feature(pattern)]` to the crate attributes to enable [INFO] [stdout] = note: this compiler was built on 2025-07-10; consider upgrading it if it is out of date [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused import: `std::str::pattern::Pattern` [INFO] [stdout] --> src/lib.rs:4:5 [INFO] [stdout] | [INFO] [stdout] 4 | use std::str::pattern::Pattern; [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_imports)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error[E0658]: use of unstable library feature `pattern`: API not fully fleshed out and ready to be stabilized [INFO] [stdout] --> src/lib.rs:4:5 [INFO] [stdout] | [INFO] [stdout] 4 | use std::str::pattern::Pattern; [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: see issue #27721 for more information [INFO] [stdout] = help: add `#![feature(pattern)]` to the crate attributes to enable [INFO] [stdout] = note: this compiler was built on 2025-07-10; consider upgrading it if it is out of date [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] For more information about this error, try `rustc --explain E0658`. [INFO] [stdout] [INFO] [stdout] For more information about this error, try `rustc --explain E0658`. [INFO] [stdout] [INFO] [stderr] error: could not compile `minigrep` (lib test) due to 1 previous error; 1 warning emitted [INFO] [stderr] warning: build failed, waiting for other jobs to finish... [INFO] [stderr] error: could not compile `minigrep` (lib) due to 1 previous error; 1 warning emitted [INFO] running `Command { std: "docker" "inspect" "becb410d7d48563c3566d931ee0d5f62b48c0fc4d6ad3ade62615a21fcf5e477", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "becb410d7d48563c3566d931ee0d5f62b48c0fc4d6ad3ade62615a21fcf5e477", kill_on_drop: false }` [INFO] [stdout] becb410d7d48563c3566d931ee0d5f62b48c0fc4d6ad3ade62615a21fcf5e477