Classes: Partial fix for constructor not calling super

src/x64/full-codegen-x64.cc

 // Copyright 2012 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/v8.h"
 
 #if V8_TARGET_ARCH_X64
 
 #include "src/code-factory.h"
 #include "src/code-stubs.h"
@@ skipping 390 matching lines @@
     __ call(isolate()->builtins()->InterruptCheck(),
             RelocInfo::CODE_TARGET);
     __ Pop(rax);
     EmitProfilingCounterReset();
     __ bind(&ok);
 #ifdef DEBUG
     // Add a label for checking the size of the code used for returning.
     Label check_exit_codesize;
     masm_->bind(&check_exit_codesize);
 #endif
-    CodeGenerator::RecordPositions(masm_, function()->end_position() - 1);
+    if (function()->end_position() != RelocInfo::kNoPosition) {
+      CodeGenerator::RecordPositions(masm_, function()->end_position() - 1);
+    }
     __ RecordJSReturn();
     // Do not use the leave instruction here because it is too short to
     // patch with the code required by the debugger.
     __ movp(rsp, rbp);
     __ popq(rbp);
     int no_frame_start = masm_->pc_offset();
 
     int arguments_bytes = (info_->scope()->num_parameters() + 1) * kPointerSize;
     __ Ret(arguments_bytes, rcx);
 
@@ skipping 4812 matching lines @@
   DCHECK_EQ(isolate->builtins()->OsrAfterStackCheck()->entry(),
             Assembler::target_address_at(call_target_address,
                                          unoptimized_code));
   return OSR_AFTER_STACK_CHECK;
 }
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_X64