[Bug ipa/86274] [7/8/9 Regression] SEGFAULT when logging std::to_string(NAN)

[jamborm at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86274

--- Comment #10 from Martin Jambor <jamborm at gcc dot gnu.org> ---
And in the previous dump (fixup_cfg1), we have

  <bb 3> :
  __len = D.127713;
  __builtin_va_end (&__args);
  std::allocator<char>::allocator (&D.122645);
  _1 = (sizetype) __len;
  _2 = __s + _1;
  std::__cxx11::basic_string<char>::basic_string<char*> (<retval>, __s, _2,
&D.122645);

So I'd say that it is either gimplification or SSA creation that does
not handle this situation correctly.