[Bug libstdc++/125565] std::enable_shared_from_this::_M_weak_this not reset before calling deleter

[redi at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=125565

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

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |RESOLVED
         Resolution|---                         |INVALID

--- Comment #4 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Boost explicitly documents this behaviour for weak_from_this():

  Note:
  Unlike shared_from_this(), weak_from_this() is valid in a destructor and
returns a
  weak_ptr that is expired() but still shares ownership with other weak_ptr
instances
  (if any) that refer to the object.

i.e. it is expected that the weak-this member still refers to the control block
even during the object's destructor, so it has to be true before that when
invoking the deleter.