https://gcc.gnu.org/bugzilla/show_bug.cgi?id=117264
--- Comment #6 from kargls at comcast dot net --- Agree with Harald, we need to see the actual code and error. program p type, abstract :: t integer :: i = 0 end type type, extends(t) :: tt integer :: j = 0 end type class(t), allocatable :: o o = f() print '(A,I0)', 'o%i = ', o%i contains function f() class(t), allocatable :: f allocate(f, source = tt(i=42)) print '(A,I0)', 'f%i = ', f%i end end % gfcx -o z a.f90 && ./z f%i = 42 o%i = 42 % gfortran14 -o z a.f90 && ./z f%i = 42 o%i = 42 % gfortran13 -o z a.f90 && ./z f%i = 42 Program received signal SIGSEGV: Segmentation fault - invalid memory reference. Backtrace for this error: #0 0x243c202e9 in ??? #1 0x243c1f40d in ??? #2 0x24164f2d2 in ??? #3 0x0 in ??? Segmentation fault (core dumped) My gfortran13 is 13.2. The newer 13.3 may have this fixed.