False positive detection of USE_AFTER_DELETE in loop

Hi,

this error :
```
src/core/execution/graph.cpp:175: error: Use After Delete
accessing `v` that was invalidated by `delete` on line 175.
173. /* delete vertices from _vertices and clear */
174. for (auto* v : _vertices) {
175. delete v;
^
176. }
177. _vertices.clear ();

Found 1 issue
Issue Type(ISSUED_TYPE_ID): #
Use After Delete(USE_AFTER_DELETE): 1
```

seems a false positive (?), or I missed something very obvious... Same error if I use an iterator-based loop instead of a range-based loop.

Best regards.