Roll HarfBuzz to 1.1.1

third_party/harfbuzz-ng/src/hb-ot-layout.cc

 /*
  * Copyright © 1998-2004  David Turner and Werner Lemberg
  * Copyright © 2006  Behdad Esfahbod
  * Copyright © 2007,2008,2009  Red Hat, Inc.
  * Copyright © 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
@@ skipping 872 matching lines @@
 
 
 template <typename Obj>
 static inline bool
 apply_forward (OT::hb_apply_context_t *c,
                const Obj &obj,
                const hb_ot_layout_lookup_accelerator_t &accel)
 {
   bool ret = false;
   hb_buffer_t *buffer = c->buffer;
-  while (buffer->idx < buffer->len)
+  while (buffer->idx < buffer->len && !buffer->in_error)
   {
     if (accel.may_have (buffer->cur().codepoint) &&
         (buffer->cur().mask & c->lookup_mask) &&
         c->check_glyph_property (&buffer->cur(), c->lookup_props) &&
         obj.apply (c))
       ret = true;
     else
       buffer->next_glyph ();
   }
   return ret;
@@ skipping 145 matching lines @@
   apply (proxy, plan, font, buffer);
 }
 
 HB_INTERNAL void
 hb_ot_layout_substitute_lookup (OT::hb_apply_context_t *c,
                                 const OT::SubstLookup &lookup,
                                 const hb_ot_layout_lookup_accelerator_t &accel)
 {
   apply_string<GSUBProxy> (c, lookup, accel);
 }