Minor fix in bidi.c:bidi_cache_reset_to.

 src/bidi.c (bidi_cache_reset_to): Invalidate bidi_cache_last_idx by
 setting it to -1.
 (bidi_find_bracket_pairs): Pass to bidi_cache_reset_to a relative
 index, not an absolute one, as that's what the function expects.

2 files changed, 12 insertions, 6 deletions

diff --git a/src/ChangeLog b/src/ChangeLog
index 6e2e55fa570..88445f3aff4 100644
--- a/src/ChangeLog
+++ b/src/ChangeLog
@@ -1,3 +1,10 @@
+2014-10-30  Eli Zaretskii  <eliz@gnu.org>
+
+        * bidi.c (bidi_cache_reset_to): Invalidate bidi_cache_last_idx by
+        setting it to -1.
+        (bidi_find_bracket_pairs): Pass to bidi_cache_reset_to a relative
+        index, not an absolute one, as that's what the function expects.
+
 2014-10-30  Dmitry Antipov  <dmantipov@yandex.ru>
 
         * xfaces.c (Finternal_set_lisp_face_attribute): Don't try to realize
diff --git a/src/bidi.c b/src/bidi.c
index ccdcb2f4451..225acd9d655 100644
--- a/src/bidi.c
+++ b/src/bidi.c
@@ -572,7 +572,7 @@ static void
 bidi_cache_reset_to (int n)
 {
   bidi_cache_idx = bidi_cache_start + n;
-  bidi_cache_last_idx = n - 1;
+  bidi_cache_last_idx = -1;
 }
 
 /* Reset the cache state to the empty state.  We only reset the part
@@ -2629,11 +2629,10 @@ bidi_find_bracket_pairs (struct bidi_it *bidi_it)
           bidi_it->bracket_enclosed_type = embedding_type;
           /* bidi_cache_last_idx is set to the index of the current
              state, because we just called bidi_cache_find above.
-             Force the cache to "forget" all the cached states
-             starting from the one corresponding to the outermost
-             opening bracket, which is what the current state
-             describes.  */
-          bidi_cache_reset_to (bidi_cache_last_idx);
+             That state describes the outermost opening bracket, the
+             one with which we entered this function.  Force the cache
+             to "forget" all the cached states starting from that state.  */
+          bidi_cache_reset_to (bidi_cache_last_idx - bidi_cache_start);
           /* Set up the next_for_neutral member, to help
              bidi_resolve_neutral.  */
           bidi_it->next_for_neutral.type = embedding_type;