bug#33618: 27.0.50; ada-mode breaks M-x grep

[Stefan Monnier]

Package: Emacs
Version: 27.0.50


Opening a file in ada-mode using the new ada-mode from GNU ELPA globally
sets compilation-search-path (for me, it got set to `("~/tmp")`
probably because the Ada file was in ~/tmp), which in
turn breaks M-x grep in the sense that clicking on a match doesn't jump
to the file but prompts you to find the file (unless you happened to
grep from one of the directories mentioned in the
compilation-search-path, of course).


        Stefan



In GNU Emacs 27.0.50 (build 1, x86_64-pc-linux-gnu, X toolkit, Xaw3d scroll 
bars)
 of 2018-11-24 built on pastel
Repository revision: 3f58f7c0289bf3fbd2e73c45561691b94cb1f6b1
Repository branch: work
Windowing system distributor 'The X.Org Foundation', version 11.0.11902000
System Description: Debian GNU/Linux 9 (stretch)

Recent messages:
previous-line: Beginning of buffer [2 times]
next-line: End of buffer [2 times]
Mark saved where search started
Mark set
Mark saved where search started
Auto-saving... [2 times]
Mark set
Undo!
Saving file /home/monnier/src/emacs/work/lisp/progmodes/grep.el...
Wrote /home/monnier/src/emacs/work/lisp/progmodes/grep.el