commit d22e9465f6228207a4fe722ee84371c7817060d6
author Bram Moolenaar <Bram@vim.org> Tue Mar 15 17:43:55 2016 +0100
committer Bram Moolenaar <Bram@vim.org> Tue Mar 15 17:43:55 2016 +0100
tree 88c78b4173edd9f3f84ed69341d7dac225bbf286
parent ce2ec0a82a778ff4d79a2c3309f6cac079d7b5ee

patch 7.4.1574
Problem:    ":undo 0" does not work. (Florent Fayolle)
Solution:   Make it undo all the way. (closes #688)

src/undo.c

diff --git a/src/undo.c b/src/undo.c
index 2bf815b..07b2781 100644
--- a/src/undo.c
+++ b/src/undo.c
@@ -2286,7 +2286,14 @@
      * Init "closest" to a value we can't reach. */
     if (absolute)
     {
-	target = step;
+	if (step == 0)
+	{
+	    /* target 0 does not exist, got to 1 and above it. */
+	    target = 1;
+	    above = TRUE;
+	}
+	else
+	    target = step;
 	closest = -1;
     }
     else