[cfe-dev] Bug in MapVector::erase ?

[Yaron Keren]

+llvmdev +Oliver. MapVector::erase was added in r211273.

To avoid duplications, MapVector stores Values inside the vector only,
while the map caches key->indices to the vector.

When a value is erased from the MapVector, it is removed from the vector,
invalidating the cached vector indices stored in the map, so the map points
to wrong locations and the MapVector is corrupted.
--
Yaron

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