[Bug c++/61769] const reference value is changed to random by a range-for loop

[redi at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=61769

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

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |RESOLVED
         Resolution|---                         |INVALID
           Severity|major                       |normal

--- Comment #3 from Jonathan Wakely <redi at gcc dot gnu.org> ---
The for loop just causes the program to reuse the stack memory where the
std::abs return slots were, so the memory where the dangling reference points
gets modified and you see the value change.