https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66714
--- Comment #1 from vries at gcc dot gnu.org ---
For c.exp, at -Ofast/-g, this failure looks similar:
...
FAIL: libgomp.oacc-c/../libgomp.oacc-c-c++-common/reduction-1.c
-DACC_DEVICE_TYPE_host_nonshm=1 -DACC_MEM_SHARED=0 (internal compiler error)
FAIL: libgomp.oacc-c/../libgomp.oacc-c-c++-common/reduction-1.c
-DACC_DEVICE_TYPE_host_nonshm=1 -DACC_MEM_SHARED=0 (test for excess errors)
...
In more detail:
...
src/libgomp/testsuite/libgomp.oacc-c/../libgomp.oacc-c-c++-common/reduction-1.c:
In function ‘test_reductions_minmax._omp_fn.6’:
src/libgomp/testsuite/libgomp.oacc-c/../libgomp.oacc-c-c++-common/reduction-1.c:96:1:
internal compiler error: Segmentation fault
0xebeb50 crash_signal
src/gcc/toplev.c:380
0x92e939 loc_list_from_tree
src/gcc/dwarf2out.c:14444
0x92ef5e loc_list_from_tree
src/gcc/dwarf2out.c:14571
0x92f3e2 loc_list_from_tree
src/gcc/dwarf2out.c:14645
0x92ef5e loc_list_from_tree
src/gcc/dwarf2out.c:14571
0x93478c add_location_or_const_value_attribute
src/gcc/dwarf2out.c:16088
0x940528 gen_variable_die
src/gcc/dwarf2out.c:19277
0x946189 gen_decl_die
src/gcc/dwarf2out.c:21028
0x94481d process_scope_var
src/gcc/dwarf2out.c:20543
0x944896 decls_for_scope
src/gcc/dwarf2out.c:20568
0x93c0c0 gen_subprogram_die
src/gcc/dwarf2out.c:18869
0x945e09 gen_decl_die
src/gcc/dwarf2out.c:20961
0x94708c dwarf2out_decl
src/gcc/dwarf2out.c:21394
0x9470ae dwarf2out_function_decl
src/gcc/dwarf2out.c:21402
0x9ecc5b rest_of_handle_final
src/gcc/final.c:4525
0x9ecfce execute
src/gcc/final.c:4567
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <http://gcc.gnu.org/bugs.html> for instructions.
...
