<table border="1" cellspacing="0" cellpadding="8">
    <tr>
        <th>Issue</th>
        <td>
            <a href=https://github.com/llvm/llvm-project/issues/144439>144439</a>
        </td>
    </tr>

    <tr>
        <th>Summary</th>
        <td>
            [LLDB] SBMemoryRegionInfoListExtensions re-uses reference and then mutates it.
        </td>
    </tr>

    <tr>
      <th>Labels</th>
      <td>
            new issue
      </td>
    </tr>

    <tr>
      <th>Assignees</th>
      <td>
      </td>
    </tr>

    <tr>
      <th>Reporter</th>
      <td>
          Jlalond
      </td>
    </tr>
</table>

<pre>
    In [SBMemoryRegionInfoListExtensions](https://github.com/llvm/llvm-project/blob/main/lldb/bindings/interface/SBMemoryRegionInfoListExtensions.i#L8), the `__iter__` function always yields the same `SBMemoryRegionInfo` reference, but each loop the content of the info will be updated.

Using the example that I wrote in the docs:

```
        readable_regions = []
 for region in exe_ctx.GetProcess().GetMemoryRegions():
            if region.IsReadable():
 readable_regions.append(region)
```

We end up with a list all to the same region


This is because in the iter:

```
    def __iter__(self):
      '''Iterate over all the memory regions in a lldb.SBMemoryRegionInfoList object.'''
 import lldb
      size = self.GetSize()
      region = lldb.SBMemoryRegionInfo()
      for i in range(size):
 self.GetMemoryRegionAtIndex(i, region)
        yield region
```

Region is a reference, and we will in the contents every loop, but if you assign anything to this reference, it will then be mutated next loop.

I filed this as an issue to communicate the bug because I assume a user has encountered this without realizing (because it's not very apparent).

</pre>
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