| Index: src/heap-snapshot-generator.cc
 | 
| diff --git a/src/heap-snapshot-generator.cc b/src/heap-snapshot-generator.cc
 | 
| index 4a4c914e4ee0ddde726c857dd117f17dfee21505..c4f9600ba7072c62608d9cc509cce8ca9045203e 100644
 | 
| --- a/src/heap-snapshot-generator.cc
 | 
| +++ b/src/heap-snapshot-generator.cc
 | 
| @@ -2164,6 +2164,9 @@ const char* V8HeapExplorer::GetStrongGcSubrootName(Object* object) {
 | 
|  #define STRING_NAME(name, str) NAME_ENTRY(name)
 | 
|      INTERNALIZED_STRING_LIST(STRING_NAME)
 | 
|  #undef STRING_NAME
 | 
| +#define SYMBOL_NAME(name) NAME_ENTRY(name)
 | 
| +    PRIVATE_SYMBOL_LIST(SYMBOL_NAME)
 | 
| +#undef SYMBOL_NAME
 | 
|  #undef NAME_ENTRY
 | 
|      CHECK(!strong_gc_subroot_names_.is_empty());
 | 
|    }
 | 
| 
 |