(display_text_line): When handling HPOS < 0 after loop,

if compute_motion fails to advance at all, don't back it up.

diff --git a/src/xdisp.c b/src/xdisp.c
index a5a86071f1a4df772764f4714edc54020784b827..977944e5918deb1d2f827c58825e3a17a69ee9b9 100644 (file)
--- a/src/xdisp.c
+++ b/src/xdisp.c
@@ -3371,8 +3371,9 @@ display_text_line (w, start, start_byte, vpos, hpos, taboffset, ovstr_done)
          compute_motion may have moved us past the screen position we
          requested, if we hit a multi-column character, or the end of
          the line.  If so, back up.  */
-      if (left_edge->vpos > vpos
-          || left_edge->hpos > 0)
+      if ((left_edge->vpos > vpos
+          || left_edge->hpos > 0)
+         && left_edge->bufpos > pos)
         {
           pos = left_edge->bufpos;
          pos_byte = left_edge->bytepos;