https://gcc.gnu.org/bugzilla/show_bug.cgi?id=124650
Bug ID: 124650
Summary: GCC double free sigsev segmentation fault std::string
Product: gcc
Version: 12.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: jlame646 at gmail dot com
Target Milestone: ---
The following program results in seg fault: https://godbolt.org/z/nMxbr6qWM
```
#include <iostream>
class MyClass {
public:
std::string shrinkAndCopy(std::string &stream) {
size_t pos = 5;
return stream = stream.substr(pos);
}
void modify(std::string &stream) {
std::string key = this->shrinkAndCopy(stream);
throw std::runtime_error("boom");
}
void run() {
std::string stream = "aaa[ERASE]aaaaaaaaaaaaaaaaaaaaaaaaaaaaaa"; // at
least 40 chars
size_t pos = 3;
size_t end = 10;
stream.erase(pos, end - pos);
this->modify(stream);
}
};
int main(void) {
try {
MyClass myClass;
myClass.run();
return 0;
}
catch (...) {
exit(1);
}
}
```
