viirya opened a new issue, #1734: URL: https://github.com/apache/arrow-rs/issues/1734
**Describe the bug** After upgrading to latest nightly toolchain, `cargo build` failed. **To Reproduce** `cargo +nightly build --all --features simd` ``` error: expected one of `!` or `::`, found keyword `mod` --> /Users/liangchi/.cargo/registry/src/github.com-1ecc6299db9ec823/packed_simd_2-0.3.6/src/lib.rs:348:7 | 348 | crate mod llvm { | ^^^ expected one of `!` or `::` error: could not compile `packed_simd_2` due to previous error warning: build failed, waiting for other jobs to finish... ``` **Expected behavior** The build command should work. **Additional context** Add any other context about the problem here. -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: github-unsubscr...@arrow.apache.org.apache.org For queries about this service, please contact Infrastructure at: us...@infra.apache.org