Fixed bug #78598 When performing an RW modification of an array offset, the undefined offset warning may call an error handler / OB callback, which may destroy the array we're suppos
Fixed bug #78598 When performing an RW modification of an array offset, the undefined offset warning may call an error handler / OB callback, which may destroy the array we're supposed to change. Detect this by temporarily incrementing the reference count. If we find that the array has been modified/destroyed in the meantime, we do nothing -- the execution model here would be that the modification has happened on the destroyed version of the array.
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