https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86182
Bug ID: 86182
Summary: gcc crashes when compiling the code
Product: gcc
Version: unknown
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: zhonghao at pku dot org.cn
Target Milestone: ---
The code is as follow:
#include <stdio.h>
template<typename T> static char const * f(T *t) {
T u(*t);
u.x = "hello world";
printf("%s\n", u.x);
return "initialized";
}
int main() {
union { char const *x = f(this); };
printf("%s\n", x);
}
gcc++ produces errors messages:
/home/haozhong/project/approach/otherreport/llvm/tmp/llvm_10531/code0.c.cpp: In
function ‘const char* f(T*) [with T = main()::<unnamed union>]’:
/home/haozhong/project/approach/otherreport/llvm/tmp/llvm_10531/code0.c.cpp:3:42:
error：Local declaration from a different function
template<typename T> static char const * f(T *t) {
^
D.2918
/home/haozhong/project/approach/otherreport/llvm/tmp/llvm_10531/code0.c.cpp:4:4:
T u(*t);
^
_1 = &D.2918;
/home/haozhong/project/approach/otherreport/llvm/tmp/llvm_10531/code0.c.cpp:3:42:
error：Local declaration from a different function
template<typename T> static char const * f(T *t) {
^
/home/haozhong/project/approach/otherreport/llvm/tmp/llvm_10531/code0.c.cpp:3:42:
error：Local declaration from a different function
during GIMPLE pass: cfg
/home/haozhong/project/approach/otherreport/llvm/tmp/llvm_10531/code0.c.cpp:3:42:
internal error：verify_gimple 失败
0xf11023 verify_gimple_in_cfg(function*, bool)
../../code/gcc/tree-cfg.c:5585
0xdf808f execute_function_todo
../../code/gcc/passes.c:1994
0xdf8fde execute_todo
../../code/gcc/passes.c:2048
Please include the complete backtrace with any bug report.
The code comes from a bug report of clang++
https://bugs.llvm.org/show_bug.cgi?id=10531
The clang report can provide hints to understand the problem.
