https://gcc.gnu.org/bugzilla/show_bug.cgi?id=84791
Bug ID: 84791
Summary: ICE with broken OpenMP reduction clause
Product: gcc
Version: 8.0
Status: UNCONFIRMED
Keywords: error-recovery, ice-on-invalid-code, openmp
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: reichelt at gcc dot gnu.org
Target Milestone: ---
The following invalid code snippet (compiled with "-fopenmp") triggers an
ICE since GCC 4.9.0 (when OpenMP 4.0 was implemented):
==============================================
typedef int I;
template<int> void foo()
{
I i;
#pragma omp parallel reduction (I::I: i)
;
}
template void foo<0>();
==============================================
bug.cc: In function 'void foo()':
bug.cc:6:35: error: 'I' is not a class, namespace, or enumeration
#pragma omp parallel reduction (I::I: i)
^
bug.cc: In instantiation of 'void foo() [with int <anonymous> = 0]':
bug.cc:10:22: required from here
bug.cc:6:11: internal compiler error: in tsubst_omp_clauses, at cp/pt.c:15664
#pragma omp parallel reduction (I::I: i)
^~~
0x643d33 tsubst_omp_clauses
../../gcc/gcc/cp/pt.c:15664
0x96d9ba tsubst_expr(tree_node*, tree_node*, int, tree_node*, bool)
../../gcc/gcc/cp/pt.c:16654
0x96d4e4 tsubst_expr(tree_node*, tree_node*, int, tree_node*, bool)
../../gcc/gcc/cp/pt.c:16190
0x96aecf tsubst_expr(tree_node*, tree_node*, int, tree_node*, bool)
../../gcc/gcc/cp/pt.c:16471
0x96a168 tsubst_expr(tree_node*, tree_node*, int, tree_node*, bool)
../../gcc/gcc/cp/pt.c:16175
0x96a168 instantiate_decl(tree_node*, bool, bool)
../../gcc/gcc/cp/pt.c:23540
0x98eb4b instantiate_pending_templates(int)
../../gcc/gcc/cp/pt.c:23656
0x8b632b c_parse_final_cleanups()
../../gcc/gcc/cp/decl2.c:4721
Please submit a full bug report, [etc.]
