[Bug fortran/123282] [OpenACC/Fortran] Illegal memory access with derived type component in repeated alloc/dealloc cycle (order-dependent)

[albert at tugraz dot at]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=123282

Christopher Albert <albert at tugraz dot at> changed:

           What    |Removed                     |Added
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  Attachment #63145|0                           |1
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--- Comment #2 from Christopher Albert <albert at tugraz dot at> ---
Created attachment 63146
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=63146&action=edit
Fix OpenACC refcount for Fortran allocatable array descriptors

This actually fixes the issue, previous patch didn't solve it.
For Fortran allocatable arrays, TO_PSET + POINTER mapping groups create
multiple tgt->list entries referencing the same splay tree key.  The
original code incremented dynamic_refcount for every list entry but
exit_data only decrements once per descriptor, causing stale mappings
in repeated alloc/enter/exit/deallocate cycles.