https://gcc.gnu.org/bugzilla/show_bug.cgi?id=121564
Bug ID: 121564
Summary: Segmentation fault when function returns pointer to a
derived type with pointer components
Product: gcc
Version: 15.1.1
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: fortran
Assignee: unassigned at gcc dot gnu.org
Reporter: baldur.paulwitz at web dot de
Target Milestone: ---
Created attachment 62125
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=62125&action=edit
Minimal example
This program demonstrates a suspected bug or a dangerous language pitfall in
Fortran. A segmentation fault occurs when a FUNCTION returns a pointer to a
derived type that has pointer components. The crash occurs even with all
compiler optimizations disabled (-O0).
The crash does NOT occur if the pointer is returned via a SUBROUTINE with an
intent(out) argument.
This suggests an issue with the handling of the temporary variable used for the
function's return value, possibly leading to a dangling pointer for the nested,
heap-allocated components of the derived type.
