[INFO] cloning repository https://github.com/statianzo/imposters [INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/statianzo/imposters" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fstatianzo%2Fimposters", kill_on_drop: false }` [INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fstatianzo%2Fimposters'... [INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }` [INFO] [stdout] 344a5027ba57464a424c1906376445b6e208cb57 [INFO] checking statianzo/imposters against try#f4690f24e7d9bcb0b168a02b06dd61391e8bd55a for pr-157814-crater-rollup [INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fstatianzo%2Fimposters" "/workspace/builds/worker-2-tc2/source", kill_on_drop: false }` [INFO] [stderr] Cloning into '/workspace/builds/worker-2-tc2/source'... [INFO] [stderr] done. [INFO] started tweaking git repo https://github.com/statianzo/imposters [INFO] finished tweaking git repo https://github.com/statianzo/imposters [INFO] tweaked toml for git repo https://github.com/statianzo/imposters written to /workspace/builds/worker-2-tc2/source/Cargo.toml [INFO] validating manifest of git repo https://github.com/statianzo/imposters on toolchain f4690f24e7d9bcb0b168a02b06dd61391e8bd55a [INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+f4690f24e7d9bcb0b168a02b06dd61391e8bd55a" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }` [INFO] crate git repo https://github.com/statianzo/imposters 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" "+f4690f24e7d9bcb0b168a02b06dd61391e8bd55a" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] [stderr] warning: Cargo.toml: `package.edition` is unspecified, defaulting to `2015` while the latest is `2024` [INFO] [stderr] warning: `imposters` (manifest) generated 1 warning [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,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" "-m" "1610612736" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:7cf07dcec6eec8f91d8fcff9552b5c74122c05467aaf1800be6da9d6f61e2ab2" "sleep" "infinity", kill_on_drop: false }` [INFO] [stdout] acb87cb76bb1bb96c4d57251163d3f3e6d183c4781baba3398fb4f57c1578eb1 [INFO] running `Command { std: "docker" "start" "acb87cb76bb1bb96c4d57251163d3f3e6d183c4781baba3398fb4f57c1578eb1", kill_on_drop: false }` [INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-w" "/opt/rustwide/workdir" "--user" "0:0" "acb87cb76bb1bb96c4d57251163d3f3e6d183c4781baba3398fb4f57c1578eb1" "/opt/rustwide/cargo-home/bin/cargo" "+f4690f24e7d9bcb0b168a02b06dd61391e8bd55a" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "acb87cb76bb1bb96c4d57251163d3f3e6d183c4781baba3398fb4f57c1578eb1", kill_on_drop: false }` [INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-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" "-w" "/opt/rustwide/workdir" "--user" "0:0" "acb87cb76bb1bb96c4d57251163d3f3e6d183c4781baba3398fb4f57c1578eb1" "/opt/rustwide/cargo-home/bin/cargo" "+f4690f24e7d9bcb0b168a02b06dd61391e8bd55a" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }` [INFO] [stderr] warning: Cargo.toml: `package.edition` is unspecified, defaulting to `2015` while the latest is `2024` [INFO] [stderr] warning: `imposters` (manifest) generated 1 warning [INFO] [stderr] Checking libc v0.2.42 [INFO] [stderr] Checking void v1.0.2 [INFO] [stderr] Checking ucd-util v0.1.1 [INFO] [stderr] Checking lazy_static v1.0.1 [INFO] [stderr] Compiling regex v1.0.1 [INFO] [stderr] Checking utf8-ranges v1.0.0 [INFO] [stderr] Checking quick-error v1.2.2 [INFO] [stderr] Checking cfg-if v0.1.4 [INFO] [stderr] Checking log v0.4.3 [INFO] [stderr] Checking unreachable v1.0.0 [INFO] [stderr] Checking termcolor v0.3.6 [INFO] [stderr] Checking thread_local v0.3.5 [INFO] [stderr] Checking humantime v1.1.1 [INFO] [stderr] Checking regex-syntax v0.6.1 [INFO] [stderr] Checking rand_core v0.2.1 [INFO] [stderr] Checking imposters v0.1.0 (/opt/rustwide/workdir) [INFO] [stdout] error[E0658]: use of unstable library feature `core_intrinsics`: intrinsics are unlikely to ever be stabilized, instead they should be used through stabilized interfaces in the rest of the standard library [INFO] [stdout] --> /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/rand_core-0.2.1/src/impls.rs:22:5 [INFO] [stdout] | [INFO] [stdout] 22 | use core::intrinsics::transmute; [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = help: add `#![feature(core_intrinsics)]` to the crate attributes to enable [INFO] [stdout] = note: this compiler was built on 2026-06-12; 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] [stderr] error: could not compile `rand_core` (lib) due to 1 previous error [INFO] [stderr] warning: build failed, waiting for other jobs to finish... [INFO] [stdout] warning: struct `Mp4File` is never constructed [INFO] [stdout] --> src/ch10_patterns/adapter.rs:6:8 [INFO] [stdout] | [INFO] [stdout] 6 | struct Mp4File {} [INFO] [stdout] | ^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: method `track_words` is never used [INFO] [stdout] --> src/ch10_patterns/adapter.rs:8:8 [INFO] [stdout] | [INFO] [stdout] 7 | impl Mp4File { [INFO] [stdout] | ------------ method in this implementation [INFO] [stdout] 8 | fn track_words(&self) -> String { [INFO] [stdout] | ^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: struct `OggFile` is never constructed [INFO] [stdout] --> src/ch10_patterns/adapter.rs:13:8 [INFO] [stdout] | [INFO] [stdout] 13 | struct OggFile {} [INFO] [stdout] | ^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: method `retrieve_lyrics` is never used [INFO] [stdout] --> src/ch10_patterns/adapter.rs:15:8 [INFO] [stdout] | [INFO] [stdout] 14 | impl OggFile { [INFO] [stdout] | ------------ method in this implementation [INFO] [stdout] 15 | fn retrieve_lyrics(&self) -> String { [INFO] [stdout] | ^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: trait `CaptionedAudio` is never used [INFO] [stdout] --> src/ch10_patterns/adapter.rs:20:7 [INFO] [stdout] | [INFO] [stdout] 20 | trait CaptionedAudio { [INFO] [stdout] | ^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing [INFO] [stdout] --> src/ch06_datastructures/heap.rs:61:17 [INFO] [stdout] | [INFO] [stdout] 61 | pub fn iter(&self) -> Iter { [INFO] [stdout] | ^^^^^ ^^^^^^^ the same lifetime is hidden here [INFO] [stdout] | | [INFO] [stdout] | the lifetime is elided here [INFO] [stdout] | [INFO] [stdout] = help: the same lifetime is referred to in inconsistent ways, making the signature confusing [INFO] [stdout] = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default [INFO] [stdout] help: use `'_` for type paths [INFO] [stdout] | [INFO] [stdout] 61 | pub fn iter(&self) -> Iter<'_, T> { [INFO] [stdout] | +++ [INFO] [stdout] [INFO] [stdout] [INFO] running `Command { std: "docker" "inspect" "acb87cb76bb1bb96c4d57251163d3f3e6d183c4781baba3398fb4f57c1578eb1", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "acb87cb76bb1bb96c4d57251163d3f3e6d183c4781baba3398fb4f57c1578eb1", kill_on_drop: false }` [INFO] [stdout] acb87cb76bb1bb96c4d57251163d3f3e6d183c4781baba3398fb4f57c1578eb1