## Summary
- Fixes#8364: clang 21 debug info (`.debug_loclists` etc.) was passing
through directive+label filters
- The label processor's `endBlock` regex only matched `.cfi_endproc`,
missing section boundaries (`.section`, `.data`, `.text`) that the main
parser already handles — so `currentLabelSet` was never cleared across
sections, causing weak label associations to leak from used labels (e.g.
jump tables in `.rodata`) into debug sections
- Passes `startBlock` and `endBlock` from the parser into `LabelContext`
instead of using hardcoded inline regexes, and clears `currentLabelSet`
on `endBlock`
## Test plan
- [x] Added `bug-8364.asm` test case with a jump table followed by
`.debug_loclists` section
- [x] Verified debug labels appear in unfiltered output but are excluded
from directive+label filtered output
- [x] Full test suite passes (2106 tests, no regressions)
- [x] TypeScript type check clean
- [x] Lint clean
🤖 Generated with [Claude Code](https://claude.com/claude-code)
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Co-authored-by: Claude Opus 4.5 <noreply@anthropic.com>
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