[shape] Allow null buffer

Ouch!
3 years ago · d72d37008d
parent 33145a4b75
commit d72d37008d
1 changed files with 3 additions and 0 deletions
--- a/src/hb-shape.cc
+++ b/src/hb-shape.cc
@ -126,6 +126,9 @@ hb_shape_full (hb_font_t          *font,
 	       unsigned int        num_features,
 	       const char * const *shaper_list)
 {
+  if (unlikely (!buffer->len))
+    return true;
+
  hb_buffer_t *text_buffer = nullptr;
  if (buffer->flags & HB_BUFFER_FLAG_VERIFY)
  {