Fix GCC builds after 204989a5a / r44650

src/objects.cc

 // Copyright 2015 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "src/objects.h"
 
 #include <cmath>
 #include <iomanip>
 #include <memory>
 #include <sstream>
@@ skipping 17638 matching lines @@
                                                         length_, seed);
       } else {
         two_byte_content_ = new uint16_t[length_];
         String::WriteToFlat(string, two_byte_content_, 0, length_);
         hash_field = StringHasher::HashSequentialString(two_byte_content_,
                                                         length_, seed);
       }
       string->set_hash_field(hash_field);
     } else {
       special_flattening_ = false;
+      one_byte_content_ = nullptr;
     }
     hash_ = string->Hash();
   }
 
   ~StringTableNoAllocateKey() {
     if (one_byte_) {
       delete[] one_byte_content_;
     } else {
       delete[] two_byte_content_;
     }
@@ skipping 68 matching lines @@
     return Handle<String>();
   }
 
  private:
   String* string_;
   int length_;
   bool one_byte_;
   bool special_flattening_;
   uint32_t hash_ = 0;
   union {
-    uint8_t* one_byte_content_ = nullptr;
+    uint8_t* one_byte_content_;
     uint16_t* two_byte_content_;
   };
 };
 
 }  // namespace
 
 // static
 Object* StringTable::LookupStringIfExists_NoAllocate(String* string) {
   DisallowHeapAllocation no_gc;
   Heap* heap = string->GetHeap();
@@ skipping 2910 matching lines @@
       // depend on this.
       return DICTIONARY_ELEMENTS;
     }
     DCHECK_LE(kind, LAST_ELEMENTS_KIND);
     return kind;
   }
 }
 
 }  // namespace internal
 }  // namespace v8