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[flang][OpenACC] host_data use_device(obj%comp) on a variable of an extended derived type: nullptr dereference at type.cpp(716) in InstantiateHelper::CreateDerivedTypeSpec #239944
Description
The following code:
subroutine s(obj)
type :: t2
integer :: x
end type
type, extends(t2) :: t
real :: y
end type
type(t) :: obj
!$acc host_data use_device(obj%y)
!$acc end host_data
endResulted in this output:
fatal internal error: nullptr dereference at /root/llvm-project/flang/lib/Semantics/type.cpp(721)
Trunk reproducer (-fsyntax-only -fopenacc): https://godbolt.org/z/8qraW397P
Activity
llvmorg-github-actions commentedon Nov 7, 2026
@llvm/issue-subscribers-flang-frontend
Author: Jiang Yuancheng (YuanchengJiang)
Details
The following code: ```fortran subroutine s(obj) type :: t2 integer :: x end type type, extends(t2) :: t real :: y end type type(t) :: obj !$acc host_data use_device(obj%y) !$acc end host_data end ```Resulted in this output:
Trunk reproducer (
-fsyntax-only -fopenacc): https://godbolt.org/z/8qraW397P