Roll HarfBuzz to 1.2.1

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

 /*
  * Copyright © 2015  Mozilla Foundation.
  * Copyright © 2015  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
@@ skipping 504 matching lines @@
     {
       last_syllable = syllable;
 
       hb_glyph_info_t ginfo = dottedcircle;
       ginfo.cluster = buffer->cur().cluster;
       ginfo.mask = buffer->cur().mask;
       ginfo.syllable() = buffer->cur().syllable();
       /* TODO Set glyph_props? */
 
       /* Insert dottedcircle after possible Repha. */
-      while (buffer->idx < buffer->len &&
+      while (buffer->idx < buffer->len && !buffer->in_error &&
              last_syllable == buffer->cur().syllable() &&
              buffer->cur().use_category() == USE_R)
         buffer->next_glyph ();
 
       buffer->output_info (ginfo);
     }
     else
       buffer->next_glyph ();
   }
 
@@ skipping 40 matching lines @@
   collect_features_use,
   NULL, /* override_features */
   data_create_use,
   data_destroy_use,
   NULL, /* preprocess_text */
   NULL, /* postprocess_glyphs */
   HB_OT_SHAPE_NORMALIZATION_MODE_COMPOSED_DIACRITICS_NO_SHORT_CIRCUIT,
   NULL, /* decompose */
   compose_use,
   setup_masks_use,
-  HB_OT_SHAPE_ZERO_WIDTH_MARKS_NONE,
+  HB_OT_SHAPE_ZERO_WIDTH_MARKS_BY_GDEF_EARLY,
   false, /* fallback_position */
 };