## Summary
Fixes an assertion failure that occurred when `server.stop()` was called
while HTTP requests were still in flight.
## Root Cause
The issue was in `jsValueAssertAlive()` at
`src/bun.js/api/server.zig:627`, which had an assertion requiring
`server.listener != null`. However, `server.stop()` immediately sets
`listener` to null, causing assertion failures when pending requests
triggered callbacks that accessed the server's JavaScript value.
## Solution
Converted the server's `js_value` from `jsc.Strong.Optional` to
`jsc.JSRef` for safer lifecycle management:
- **On `stop()`**: Downgrade from strong to weak reference instead of
calling `deinit()`
- **In `finalize()`**: Properly call `deinit()` on the JSRef
- **Remove problematic assertion**: JSRef allows safe access to JS value
via weak reference even after stop
## Benefits
- ✅ No more assertion failures when stopping servers with pending
requests
- ✅ In-flight requests can still access the server JS object safely
- ✅ JS object can be garbage collected when appropriate
- ✅ Maintains backward compatibility - no external API changes
## Test plan
- [x] Reproduces the original assertion failure
- [x] Verifies the fix resolves the issue
- [x] Adds regression test to prevent future occurrences
- [x] Confirms normal server functionality still works
The fix includes a comprehensive regression test at
`test/regression/issue/server-stop-with-pending-requests.test.ts`.
🤖 Generated with [Claude Code](https://claude.ai/code)
---------
Co-authored-by: Claude Bot <claude-bot@bun.sh>
Co-authored-by: Claude <noreply@anthropic.com>
Co-authored-by: autofix-ci[bot] <114827586+autofix-ci[bot]@users.noreply.github.com>
Co-authored-by: Jarred Sumner <jarred@jarredsumner.com>
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