Add Rust AddressSanitizer CI coverage - #9210
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Run the Rust usage test suite under AddressSanitizer on Linux. This adds continuous sanitizer coverage for FlatBuffers' Rust code and helps detect memory-safety regressions in unsafe code paths. The configuration was validated locally on x86_64 Linux with nightly Rust and rust-src, with the complete Rust usage test suite passing under AddressSanitizer. Refs google#6401.
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Summary
Add a dedicated Linux CI job that runs the Rust usage test suite under AddressSanitizer.
This provides continuous sanitizer coverage for FlatBuffers' Rust implementation, including code paths that rely on
unsafe, as discussed in #6401.Changes
build-rust-linux-asanGitHub Actions job on Ubuntu 24.04.rust-srccomponent.RUSTFLAGSandRUSTDOCFLAGS.-Zbuild-std.tests/rust_usage_testforx86_64-unknown-linux-gnu.Validation
The same configuration was tested locally on x86_64 Linux.
The Rust usage test suite completed successfully under AddressSanitizer with no sanitizer findings, including the main integration suite with 276 tests and the additional array, optional-scalar, defaults, vtable, and sample tests.
No production library behavior is changed by this PR.
Refs #6401