[Bug c++/101850] Initialising a struct/class variable to itself does not fail at compile time (but throws std::bad_alloc at run time, as expected)

[redi at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101850

Jonathan Wakely <redi at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
         Resolution|---                         |FIXED
   Target Milestone|---                         |11.0
             Status|UNCONFIRMED                 |RESOLVED

--- Comment #6 from Jonathan Wakely <redi at gcc dot gnu.org> ---
extern "C" char* strdup(const char*);
extern "C" void free(void*);

namespace std 
{
  struct string
  {
    string() { }
    string(string const& s) : data(strdup(s.data)) { }
    string& operator=(string const& s) {
      free(data);
      strdup(s.data);
      return *this;
    }
    ~string() { free(data); }

    char* data = nullptr;
  };
}

class M {
  std::string s;

public:
  M(std::string t) : s(t) {}
};

int main() {
  M m = m;
}

This started to warn with r11-959 "Implement a solution for PR middle-end/10138
and PR middle-end/95136."

I think this can be considered FIXED for GCC 11.