## Summary
- Fixed a bug where named function expressions were not renamed when
their name shadowed an outer symbol that's referenced inside the
function body
- This caused infinite recursion at runtime when namespace imports were
inlined
- Particularly affected Svelte 5 apps in dev mode
## Test plan
- [x] Added regression test that reproduces the issue
- [x] Verified test fails with system bun and passes with fix
- [x] Ran bundler tests (bundler_regressions, bundler_naming,
bundler_edgecase, bundler_minify) - all pass
## Root cause
The bundler was skipping `function_args` scopes when renaming symbols.
This meant named function expression names (which are declared in the
function_args scope) were never considered for renaming when they
collided with outer symbols.
For example, this code:
```javascript
import * as $ from './lib';
$.doSomething(function get() {
return $.get(123); // Should call outer get
});
```
Would be bundled as:
```javascript
function get(x) { return x * 2; } // from lib
doSomething(function get() {
return get(123); // Calls itself - infinite recursion!
});
```
Instead of:
```javascript
function get(x) { return x * 2; }
doSomething(function get2() { // Renamed to avoid collision
return get(123); // Correctly calls outer get
});
```
Fixes#25648🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-authored-by: Claude Bot <claude-bot@bun.sh>
Co-authored-by: Claude Opus 4.5 <noreply@anthropic.com>
Co-authored-by: Jarred Sumner <jarred@jarredsumner.com>
