https://gcc.gnu.org/bugzilla/show_bug.cgi?id=99990
Bug ID: 99990
Summary: Crash in GCC-11/gimplify
Product: gcc
Version: 11.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c
Assignee: unassigned at gcc dot gnu.org
Reporter: k.even-mendoza at imperial dot ac.uk
Target Milestone: ---
In Ubuntu 18, with GCC-11 (gcc (GCC) 11.0.1 20210317 (experimental)), when
trying to compile this code:
#include <stdarg.h>
void a() {
va_arg(0, long);
void *b[] = 0;
}
GCC-11 crashed with this error:
===
/home/user42/data/gcc-csmith-0/gcc-install/bin/gcc
934d08d3ee1bab940b2f2f2651e06ccaf8d82f87.c
In file included from 934d08d3ee1bab940b2f2f2651e06ccaf8d82f87.c:1:
934d08d3ee1bab940b2f2f2651e06ccaf8d82f87.c: In function ‘a’:
934d08d3ee1bab940b2f2f2651e06ccaf8d82f87.c:3:13: error: first argument to
‘va_arg’ not of type ‘va_list’
3 | va_arg(0, long);
| ^~~~
934d08d3ee1bab940b2f2f2651e06ccaf8d82f87.c:4:15: error: invalid initializer
4 | void *b[] = 0;
| ^
In file included from 934d08d3ee1bab940b2f2f2651e06ccaf8d82f87.c:1:
934d08d3ee1bab940b2f2f2651e06ccaf8d82f87.c:3:13: internal compiler error: in
gimplify_va_arg_expr, at gimplify.c:15594
3 | va_arg(0, long);
| ^
0x6b7b93 gimplify_va_arg_expr(tree_node**, gimple**, gimple**)
.././../gcc-source/gcc/gimplify.c:15594
0xb8e839 gimplify_expr(tree_node**, gimple**, gimple**, bool (*)(tree_node*),
int)
.././../gcc-source/gcc/gimplify.c:14156
0xb91416 gimplify_stmt(tree_node**, gimple**)
.././../gcc-source/gcc/gimplify.c:6876
0xb8ecbb gimplify_statement_list
.././../gcc-source/gcc/gimplify.c:1879
0xb8ecbb gimplify_expr(tree_node**, gimple**, gimple**, bool (*)(tree_node*),
int)
.././../gcc-source/gcc/gimplify.c:14526
0xb91416 gimplify_stmt(tree_node**, gimple**)
.././../gcc-source/gcc/gimplify.c:6876
0xb91bd1 gimplify_bind_expr
.././../gcc-source/gcc/gimplify.c:1421
0xb8e1ee gimplify_expr(tree_node**, gimple**, gimple**, bool (*)(tree_node*),
int)
.././../gcc-source/gcc/gimplify.c:14283
0xba776f gimplify_stmt(tree_node**, gimple**)
.././../gcc-source/gcc/gimplify.c:6876
0xba776f gimplify_body(tree_node*, bool)
.././../gcc-source/gcc/gimplify.c:15318
0xba7b9d gimplify_function_tree(tree_node*)
.././../gcc-source/gcc/gimplify.c:15472
0x9dc057 cgraph_node::analyze()
.././../gcc-source/gcc/cgraphunit.c:670
0x9debb7 analyze_functions
.././../gcc-source/gcc/cgraphunit.c:1236
0x9df81d symbol_table::finalize_compilation_unit()
.././../gcc-source/gcc/cgraphunit.c:2514
Please submit a full bug report,
===
Before (gcc-10) it would just stop the compilation (with these two errors) and
exit without crashing.
