Are string literals from default arguments used in extern inlines supposed to have the same addresses across all translation units?

  void f(const char* = "s")
  inline g() {
    f();
  }

Must the "s" strings be the same in all copies of the inline function?

Steve Adamczyk: The totality of the standard's wisdom on this topic is (9.2.3 [dcl.fct.spec] paragraph 4):

A string literal in an extern inline function is the same object in different translation units.

I'd hazard a guess that a literal in a default argument expression is not "in" the extern inline function (it doesn't appear in the tokens of the function), and therefore it need not be the same in different translation units.

I don't know that users would expect such strings to have the same address, and an equally valid (and incompatible) expectation would be that the same string literal would be used for every expansion of a given default argument in a single translation unit.