[Bug c++/77489] Invalid mangling of static local variables

[jason at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=77489

--- Comment #6 from Jason Merrill <jason at gcc dot gnu.org> ---
(In reply to Markus Trippelsdorf from comment #2)
> Untested patch:

This looks good, except that the mangling change needs to depend on
-fabi-version, and in the demangling change open braces go on a new line.  And
we'll want tests for both changes.