| Index: third_party/harfbuzz-ng/src/hb-open-type-private.hh
 | 
| diff --git a/third_party/harfbuzz-ng/src/hb-open-type-private.hh b/third_party/harfbuzz-ng/src/hb-open-type-private.hh
 | 
| index 5616f04deec7d687281249b4896bc896fa38a763..477d9e28b2c8a1487dd5e58ea395136d58f96e5d 100644
 | 
| --- a/third_party/harfbuzz-ng/src/hb-open-type-private.hh
 | 
| +++ b/third_party/harfbuzz-ng/src/hb-open-type-private.hh
 | 
| @@ -194,6 +194,7 @@ struct hb_sanitize_context_t
 | 
|    {
 | 
|      this->start = hb_blob_get_data (this->blob, NULL);
 | 
|      this->end = this->start + hb_blob_get_length (this->blob);
 | 
| +    assert (this->start <= this->end); /* Must not overflow. */
 | 
|      this->edit_count = 0;
 | 
|      this->debug_depth = 0;
 | 
|  
 | 
| 
 |