Roll HarfBuzz to 1.2.1

third_party/harfbuzz-ng/src/hb-ot-shape-complex-myanmar.cc

 /*
  * Copyright © 2011,2012,2013  Google, Inc.
  *
  *  This is part of HarfBuzz, a text shaping library.
  *
  * Permission is hereby granted, without written agreement and without
  * license or royalty fees, to use, copy, modify, and distribute this
  * software and its documentation for any purpose, provided that the
  * above copyright notice and the following two paragraphs appear in
  * all copies of this software.
@@ skipping 433 matching lines @@
 
   hb_glyph_info_t dottedcircle = {0};
   dottedcircle.codepoint = 0x25CCu;
   set_myanmar_properties (dottedcircle);
   dottedcircle.codepoint = dottedcircle_glyph;
 
   buffer->clear_output ();
 
   buffer->idx = 0;
   unsigned int last_syllable = 0;
-  while (buffer->idx < buffer->len)
+  while (buffer->idx < buffer->len && !buffer->in_error)
   {
     unsigned int syllable = buffer->cur().syllable();
     syllable_type_t syllable_type = (syllable_type_t) (syllable & 0x0F);
     if (unlikely (last_syllable != syllable && syllable_type == broken_cluster))
     {
       last_syllable = syllable;
 
       hb_glyph_info_t ginfo = dottedcircle;
       ginfo.cluster = buffer->cur().cluster;
       ginfo.mask = buffer->cur().mask;
@@ skipping 64 matching lines @@
   NULL, /* data_destroy */
   NULL, /* preprocess_text */
   NULL, /* postprocess_glyphs */
   HB_OT_SHAPE_NORMALIZATION_MODE_COMPOSED_DIACRITICS_NO_SHORT_CIRCUIT,
   NULL, /* decompose */
   NULL, /* compose */
   setup_masks_myanmar,
   HB_OT_SHAPE_ZERO_WIDTH_MARKS_BY_GDEF_EARLY,
   false, /* fallback_position */
 };