https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86432
Bug ID: 86432
Summary: ICE on capture VLA by reference
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: tomilovanatoliy at yandex dot ru
Target Milestone: ---
Code:
#include <iostream>
int main(int argc, char * argv[])
{
char * v[argc];
for (int c = 0; c < argc; ++c) {
v[c] = argv[c];
}
[&v]
{
std::cout << sizeof(v) << std::endl;
}();
}
Error (command line `g++ prog.cc -Wall -Wextra -std=gnu++2a`):
prog.cc: In lambda function:
prog.cc:11:30: warning: '<anonymous>' is used uninitialized in this function
[-Wuninitialized]
std::cout << sizeof(v) << std::endl;
^
during RTL pass: expand
prog.cc:11:30: internal compiler error: in expand_expr_real_1, at expr.c:9907
0x591cb6 expand_expr_real_1(tree_node*, rtx_def*, machine_mode,
expand_modifier, rtx_def**, bool)
../../source/gcc/expr.c:9901
0x89c9dd expand_expr
../../source/gcc/expr.h:279
0x89c9dd expand_expr_real_2(separate_ops*, rtx_def*, machine_mode,
expand_modifier)
../../source/gcc/expr.c:8418
0x79d0c7 expand_gimple_stmt_1
../../source/gcc/cfgexpand.c:3673
0x79d0c7 expand_gimple_stmt
../../source/gcc/cfgexpand.c:3734
0x79e75f expand_gimple_basic_block
../../source/gcc/cfgexpand.c:5765
0x7a38c6 execute
../../source/gcc/cfgexpand.c:6368
