From: Noam Postavsky <npostavs@gmail.com>
Date: Sun, 5 Nov 2017 16:36:20 +0000 (-0500)
Subject: Don't replace user input when completion prefix is empty (Bug#18951)
X-Git-Tag: emacs-26.0.91~370
X-Git-Url: http://git.eshelyaron.com/gitweb/?a=commitdiff_plain;h=5d744e032fee9ce60446a3cc0cf7c2e681ace465;p=emacs.git

Don't replace user input when completion prefix is empty (Bug#18951)

* lisp/pcomplete.el (pcomplete-parse-arguments): Only replace user
input if we produced a non-empty common completion stub.
---

diff --git a/lisp/pcomplete.el b/lisp/pcomplete.el
index 745a813b758..2d2a8773bfe 100644
--- a/lisp/pcomplete.el
+++ b/lisp/pcomplete.el
@@ -772,7 +772,7 @@ this is `comint-dynamic-complete-functions'."
 		(setq c (cdr c)))
 	      (setq pcomplete-stub (substring common-stub 0 len)
 		    pcomplete-autolist t)
-	      (when (and begin (not pcomplete-show-list))
+	      (when (and begin (> len 0) (not pcomplete-show-list))
 		(delete-region begin (point))
 		(pcomplete-insert-entry "" pcomplete-stub))
 	      (throw 'pcomplete-completions completions))