Files
bun.sh/src/install/PackageManager
robobun 80fb7c7375 Fix panic when installing global packages with --trust and existing trusted dependencies (#22303)
## Summary

Fixes index out of bounds panic in `PackageJSONEditor` when removing
duplicate trusted dependencies.

The issue occurred when iterating over
`trusted_deps_to_add_to_package_json.items` with a `for` loop and
calling `swapRemove()` during iteration. The `for` loop captures the
array length at the start, but `swapRemove()` modifies the array length,
causing the loop to access indices that are now out of bounds.

## Root Cause

In `PackageJSONEditor.zig:408`, the code was:

```zig
for (manager.trusted_deps_to_add_to_package_json.items, 0..) |trusted_package_name, i| {
    // ... find duplicate logic ...
    allocator.free(manager.trusted_deps_to_add_to_package_json.swapRemove(i));
}
```

When `swapRemove(i)` is called, it removes the element and decreases the
array length, but the `for` loop continues with the original captured
length, leading to index out of bounds.

## Solution

Changed to iterate backwards using a `while` loop:

```zig
var i: usize = manager.trusted_deps_to_add_to_package_json.items.len;
while (i > 0) {
    i -= 1;
    // ... same logic ...
    allocator.free(manager.trusted_deps_to_add_to_package_json.swapRemove(i));
}
```

Backwards iteration is safe because removing elements doesn't affect
indices we haven't processed yet.

## Test Plan

Manually tested the reproduction case:
```bash
# This command previously panicked, now works
bun install -g --trust @google/gemini-cli
```

Fixes #22261

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-authored-by: Claude Bot <claude-bot@bun.sh>
Co-authored-by: Claude <noreply@anthropic.com>
2025-09-02 23:00:02 -07:00
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