[perl #105024] UNIVERSAL::AUTOLOAD and %+

[perl #105024] UNIVERSAL::AUTOLOAD and %+

The code in gv.c for loading a tie module automatically
(S_require_tie_mod) was only loading the module if its stash did not
exist or if a particular method (usually TIEHASH) could not be found.
But it was triggering autoloading, such that a universal AUTOLOAD
method would allow it to ‘find’ the method it was looking for, even if
it did not exist.  So autovivifying the package somehow (e.g., by men-
tioning one of its symbols) could prevent the module from loading.