(Fforward_comment): When count1 is negative, return nil if FROM reaches STOP.

1 files changed, 7 insertions, 1 deletions

diff --git a/src/syntax.c b/src/syntax.c
index df89836d099..371ddedbd74 100644
--- a/src/syntax.c
+++ b/src/syntax.c
@@ -1507,9 +1507,15 @@ between them, return t; otherwise return nil.")
 
   while (count1 < 0)
     {
-      while (from > stop)
+      while (1)
         {
           int quoted;
+          if (from <= stop)
+            {
+              SET_PT (stop);
+              immediate_quit = 0;
+              return Qnil;
+            }
 
           DEC_POS (from);
           quoted = char_quoted (from);