https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98407
Bug ID: 98407
Summary: [11 Regression] ICE: Aborted (in constant_byte_string;
free(): invalid pointer)
Product: gcc
Version: 11.0
Status: UNCONFIRMED
Keywords: ice-on-valid-code
Severity: normal
Priority: P3
Component: c
Assignee: unassigned at gcc dot gnu.org
Reporter: asolokha at gmx dot com
Target Milestone: ---
gcc-11.0.0-alpha20201220 snapshot (g:18e86fae2a14f78e70aae06afce6bb9853068bb1)
ICEs when compiling the following testcase w/ -O1:
struct gk {
int mi;
int vq[];
};
const struct gk un = { 0, { 0, }, }, og = { 0, { 0, }, };
int
ia (void)
{
return __builtin_memcmp (&un, &og, sizeof og);
}
% MALLOC_PERTURB_=3 MALLOC_CHECK_=3 gcc-11.0.0 -O1 -c jenyen4s.c
free(): invalid pointer
jenyen4s.c: In function 'ia':
jenyen4s.c:11:3: internal compiler error: Aborted
11 | return __builtin_memcmp (&un, &og, sizeof og);
| ^~~~~~
0xdf83df crash_signal
/var/tmp/portage/sys-devel/gcc-11.0.0_alpha20201220/work/gcc-11-20201220/gcc/toplev.c:327
0xa6fe97 constant_byte_string
/var/tmp/portage/sys-devel/gcc-11.0.0_alpha20201220/work/gcc-11-20201220/gcc/expr.c:11836
0xaa58ef getbyterep(tree_node*, unsigned long*)
/var/tmp/portage/sys-devel/gcc-11.0.0_alpha20201220/work/gcc-11-20201220/gcc/fold-const.c:16242
0xad94a7 fold_const_call(combined_fn, tree_node*, tree_node*, tree_node*,
tree_node*)
/var/tmp/portage/sys-devel/gcc-11.0.0_alpha20201220/work/gcc-11-20201220/gcc/fold-const-call.c:1806
0x921958 fold_builtin_3
/var/tmp/portage/sys-devel/gcc-11.0.0_alpha20201220/work/gcc-11-20201220/gcc/builtins.c:12034
0x921958 fold_builtin_n
/var/tmp/portage/sys-devel/gcc-11.0.0_alpha20201220/work/gcc-11-20201220/gcc/builtins.c:12115
0xaa3fca fold_build_call_array_loc(unsigned int, tree_node*, tree_node*, int,
tree_node**)
/var/tmp/portage/sys-devel/gcc-11.0.0_alpha20201220/work/gcc-11-20201220/gcc/fold-const.c:13827
0x8297e1 build_function_call_vec(unsigned int, vec<unsigned int, va_heap,
vl_ptr>, tree_node*, vec<tree_node*, va_gc, vl_embed>*, vec<tree_node*, va_gc,
vl_embed>*, tree_node*)
/var/tmp/portage/sys-devel/gcc-11.0.0_alpha20201220/work/gcc-11-20201220/gcc/c/c-typeck.c:3155
0x84924a c_parser_postfix_expression_after_primary
/var/tmp/portage/sys-devel/gcc-11.0.0_alpha20201220/work/gcc-11-20201220/gcc/c/c-parser.c:10470
0x840599 c_parser_postfix_expression
/var/tmp/portage/sys-devel/gcc-11.0.0_alpha20201220/work/gcc-11-20201220/gcc/c/c-parser.c:10143
0x844a6a c_parser_unary_expression
/var/tmp/portage/sys-devel/gcc-11.0.0_alpha20201220/work/gcc-11-20201220/gcc/c/c-parser.c:8230
0x84629b c_parser_cast_expression
/var/tmp/portage/sys-devel/gcc-11.0.0_alpha20201220/work/gcc-11-20201220/gcc/c/c-parser.c:8072
0x846547 c_parser_binary_expression
/var/tmp/portage/sys-devel/gcc-11.0.0_alpha20201220/work/gcc-11-20201220/gcc/c/c-parser.c:7875
0x8478c8 c_parser_conditional_expression
/var/tmp/portage/sys-devel/gcc-11.0.0_alpha20201220/work/gcc-11-20201220/gcc/c/c-parser.c:7598
0x847fc4 c_parser_expr_no_commas
/var/tmp/portage/sys-devel/gcc-11.0.0_alpha20201220/work/gcc-11-20201220/gcc/c/c-parser.c:7513
0x848275 c_parser_expression
/var/tmp/portage/sys-devel/gcc-11.0.0_alpha20201220/work/gcc-11-20201220/gcc/c/c-parser.c:10606
0x848abb c_parser_expression_conv
/var/tmp/portage/sys-devel/gcc-11.0.0_alpha20201220/work/gcc-11-20201220/gcc/c/c-parser.c:10645
0x83e927 c_parser_statement_after_labels
/var/tmp/portage/sys-devel/gcc-11.0.0_alpha20201220/work/gcc-11-20201220/gcc/c/c-parser.c:6160
0x8400c2 c_parser_compound_statement_nostart
/var/tmp/portage/sys-devel/gcc-11.0.0_alpha20201220/work/gcc-11-20201220/gcc/c/c-parser.c:5788
0x85e435 c_parser_compound_statement
/var/tmp/portage/sys-devel/gcc-11.0.0_alpha20201220/work/gcc-11-20201220/gcc/c/c-parser.c:5597
There's a memory corruption issue somewhere, so it's better reproducible w/
Valgrind, MALLOC_PERTURB_ functionality provided by glibc, or some similar
means.
