Fixes
- Double-wrapper support: Handle
RUSTC_WRAPPER+RUSTC_WORKSPACE_WRAPPER(e.g.cargo clippy) — fixes "multiple input filenames" error - Coverage compatibility: Skip
--remap-path-prefixwhen-Cinstrument-coverageis active, so tarpaulin/llvm-cov can map profraw data to source files - Cache key correctness: Include remap status in cache key to prevent stale artifact collisions between coverage and non-coverage builds