Fix bug #17269 with corruption of the newline cache.

 src/insdel.c (invalidate_buffer_caches): Invalidate the bidi
 paragraph-start cache before the newline cache.

2 files changed, 17 insertions, 10 deletions

diff --git a/src/ChangeLog b/src/ChangeLog
index 84760abd019..d0aa2e59e01 100644
--- a/src/ChangeLog
+++ b/src/ChangeLog
@@ -1,3 +1,8 @@
+2014-04-17  Eli Zaretskii  <eliz@gnu.org>
+
+        * insdel.c (invalidate_buffer_caches): Invalidate the bidi
+        paragraph-start cache before the newline cache.  (Bug#17269)
+
 2014-04-16  Stefan Monnier  <monnier@iro.umontreal.ca>
 
         * window.c (save_window_save): Lookup window_point_insertion_type in
diff --git a/src/insdel.c b/src/insdel.c
index ea5f6301501..85526d46db1 100644
--- a/src/insdel.c
+++ b/src/insdel.c
@@ -1857,14 +1857,9 @@ invalidate_buffer_caches (struct buffer *buf, ptrdiff_t start, ptrdiff_t end)
      need to consider the caches of their base buffer.  */
   if (buf->base_buffer)
     buf = buf->base_buffer;
-  if (buf->newline_cache)
-    invalidate_region_cache (buf,
-                             buf->newline_cache,
-                             start - BUF_BEG (buf), BUF_Z (buf) - end);
-  if (buf->width_run_cache)
-    invalidate_region_cache (buf,
-                             buf->width_run_cache,
-                             start - BUF_BEG (buf), BUF_Z (buf) - end);
+  /* The bidi_paragraph_cache must be invalidated first, because doing
+     so might need to use the newline_cache (via find_newline_no_quit,
+     see below).  */
   if (buf->bidi_paragraph_cache)
     {
       if (start != end
@@ -1888,13 +1883,20 @@ invalidate_buffer_caches (struct buffer *buf, ptrdiff_t start, ptrdiff_t end)
                                                &start_byte);
               set_buffer_internal (old);
             }
-          if (line_beg > BUF_BEG (buf))
-            start = line_beg - 1;
+          start = line_beg - (line_beg > BUF_BEG (buf));
         }
       invalidate_region_cache (buf,
                                buf->bidi_paragraph_cache,
                                start - BUF_BEG (buf), BUF_Z (buf) - end);
     }
+  if (buf->newline_cache)
+    invalidate_region_cache (buf,
+                             buf->newline_cache,
+                             start - BUF_BEG (buf), BUF_Z (buf) - end);
+  if (buf->width_run_cache)
+    invalidate_region_cache (buf,
+                             buf->width_run_cache,
+                             start - BUF_BEG (buf), BUF_Z (buf) - end);
 }
 
 /* These macros work with an argument named `preserve_ptr'