Problem: Crash with overlong emacs tag file, because of an OOB buffer
read (ehdgks0627, un3xploitable)
Solution: Check for end of buffer and return early.
Github Advisory:
https://github.com/vim/vim/security/advisories/GHSA-h4mf-vg97-hj8jf6a7f469a9
Cherry-pick a change from patch 9.0.0767.
Add missing change from patch 9.2.0070.
Co-authored-by: Christian Brabandt <cb@256bit.org>
Problem: tests: various tests leave swapfiles around
Solution: close open buffers using :bw! instead of :close!
2fa34b6422
Co-authored-by: Christian Brabandt <cb@256bit.org>
Problem: Wrong Ex command executed when :g uses '?' as delimiter and
pattern contains escaped '?'.
Solution: Don't use "*newp" when it's not allocated (zeertzjq).
closes: vim/vim#148373074137542
