Fix number parsing to not allow space between sign and digits.

test/cctest/test-conversions.cc

 // Copyright 2006-2008 the V8 project authors. All rights reserved.
 
 #include <stdlib.h>
 
 #include "v8.h"
 
 #include "platform.h"
 #include "cctest.h"
 
 using namespace v8::internal;
@@ skipping 86 matching lines @@
   CHECK_EQ(0.0, StringToDouble(" ", NO_FLAGS));
 }
 
 TEST(IntegerStrLiteral) {
   CHECK_EQ(0.0, StringToDouble("0.0", NO_FLAGS));
   CHECK_EQ(0.0, StringToDouble("0", NO_FLAGS));
   CHECK_EQ(0.0, StringToDouble("00", NO_FLAGS));
   CHECK_EQ(0.0, StringToDouble("000", NO_FLAGS));
   CHECK_EQ(1.0, StringToDouble("1", NO_FLAGS));
   CHECK_EQ(-1.0, StringToDouble("-1", NO_FLAGS));
-  CHECK_EQ(-1.0, StringToDouble("  -  1  ", NO_FLAGS));
-  CHECK_EQ(1.0, StringToDouble("  +  1  ", NO_FLAGS));
+  CHECK_EQ(-1.0, StringToDouble("  -1  ", NO_FLAGS));
+  CHECK_EQ(1.0, StringToDouble("  +1  ", NO_FLAGS));
+  CHECK(isnan(StringToDouble("  -  1  ", NO_FLAGS)));
+  CHECK(isnan(StringToDouble("  +  1  ", NO_FLAGS)));
 
   CHECK_EQ(0.0, StringToDouble("0e0", ALLOW_HEX | ALLOW_OCTALS));
   CHECK_EQ(0.0, StringToDouble("0e1", ALLOW_HEX | ALLOW_OCTALS));
   CHECK_EQ(0.0, StringToDouble("0e-1", ALLOW_HEX | ALLOW_OCTALS));
   CHECK_EQ(0.0, StringToDouble("0e-100000", ALLOW_HEX | ALLOW_OCTALS));
   CHECK_EQ(0.0, StringToDouble("0e+100000", ALLOW_HEX | ALLOW_OCTALS));
   CHECK_EQ(0.0, StringToDouble("0.", ALLOW_HEX | ALLOW_OCTALS));
 }
 
 TEST(LongNumberStr) {
@@ skipping 118 matching lines @@
     CHECK(EightBit1::is_valid(i));
     x = EightBit1::encode(i);
     CHECK_EQ(i, EightBit1::decode(x));
     CHECK(EightBit2::is_valid(i));
     x = EightBit2::encode(i);
     CHECK_EQ(i, EightBit2::decode(x));
   }
   CHECK(!EightBit1::is_valid(256));
   CHECK(!EightBit2::is_valid(256));
 }