Don't allow whitespace after sign characters in parseInt.

src/conversions.cc

 // 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 236 matching lines @@
   if (!AdvanceToNonspace(unicode_cache, &current, end)) {
     return empty_string_val;
   }
 
   bool negative = false;
   bool leading_zero = false;
 
   if (*current == '+') {
     // Ignore leading sign; skip following spaces.
     ++current;
-    if (!AdvanceToNonspace(unicode_cache, &current, end)) {
+    if (current == end) {
       return JUNK_STRING_VALUE;
     }
   } else if (*current == '-') {
     ++current;
-    if (!AdvanceToNonspace(unicode_cache, &current, end)) {
+    if (current == end) {
       return JUNK_STRING_VALUE;
     }
     negative = true;
   }
 
   if (radix == 0) {
     // Radix detection.
     if (*current == '0') {
       ++current;
       if (current == end) return SignedZero(negative);
@@ skipping 840 matching lines @@
   (n == 0 ? v8::internal::dtoa_lock_zero : v8::internal::dtoa_lock_one)->Lock();
 }
 
 
 void FREE_DTOA_LOCK(int n) {
   ASSERT(n == 0 || n == 1);
   (n == 0 ? v8::internal::dtoa_lock_zero : v8::internal::dtoa_lock_one)->
       Unlock();
 }
 }