Fix parseInt's octal parsing behavior (ECMA-262 Annex E 15.1.2.2).

src/conversions-inl.h

 // Copyright 2011 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 250 matching lines @@
   } else if (*current == '-') {
     ++current;
     if (current == end) {
       return JunkStringValue();
     }
     negative = true;
   }
 
   if (radix == 0) {
     // Radix detection.
+    radix = 10;
     if (*current == '0') {
       ++current;
       if (current == end) return SignedZero(negative);
       if (*current == 'x' || *current == 'X') {
         radix = 16;
         ++current;
         if (current == end) return JunkStringValue();
       } else {
-        radix = 8;
         leading_zero = true;
       }
-    } else {
-      radix = 10;
     }
   } else if (radix == 16) {
     if (*current == '0') {
       // Allow "0x" prefix.
       ++current;
       if (current == end) return SignedZero(negative);
       if (*current == 'x' || *current == 'X') {
         ++current;
         if (current == end) return JunkStringValue();
       } else {
@@ skipping 377 matching lines @@
   ASSERT(buffer_pos < kBufferSize);
   buffer[buffer_pos] = '\0';
 
   double converted = Strtod(Vector<const char>(buffer, buffer_pos), exponent);
   return (sign == NEGATIVE) ? -converted : converted;
 }
 
 } }  // namespace v8::internal
 
 #endif  // V8_CONVERSIONS_INL_H_