Fix strtod.

Strtod function used buffer that was allocated inside a nested scope.

Review URL: http://codereview.chromium.org/4639006

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@5815 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

src/strtod.cc

@@ -422,9 +422,9 @@ double Strtod(Vector<const char> buffer, int exponent) {
     int significant_exponent;
     TrimToMaxSignificantDigits(trimmed, exponent,
                                significant_buffer, &significant_exponent);
-    trimmed =
-        Vector<const char>(significant_buffer, kMaxSignificantDecimalDigits);
-    exponent = significant_exponent;
+    return Strtod(Vector<const char>(significant_buffer,
+                                     kMaxSignificantDecimalDigits),
+                  significant_exponent);
   }
   if (exponent + trimmed.length() - 1 >= kMaxDecimalPower) return V8_INFINITY;
   if (exponent + trimmed.length() <= kMinDecimalPower) return 0.0;

test/cctest/test-strtod.cc

@@ -259,6 +259,23 @@ TEST(Strtod) {
   CHECK_EQ(1234567890123456789052345e115,
            StrtodChar("1234567890123456789052345", 115));
 
+  CHECK_EQ(5.445618932859895e-255,
+           StrtodChar("5445618932859895362967233318697132813618813095743952975"
+                      "4392982234069699615600475529427176366709107287468930197"
+                      "8628345413991790019316974825934906752493984055268219809"
+                      "5012176093045431437495773903922425632551857520884625114"
+                      "6241265881735209066709685420744388526014389929047617597"
+                      "0302268848374508109029268898695825171158085457567481507"
+                      "4162979705098246243690189880319928315307816832576838178"
+                      "2563074014542859888710209237525873301724479666744537857"
+                      "9026553346649664045621387124193095870305991178772256504"
+                      "4368663670643970181259143319016472430928902201239474588"
+                      "1392338901353291306607057623202353588698746085415097902"
+                      "6640064319118728664842287477491068264828851624402189317"
+                      "2769161449825765517353755844373640588822904791244190695"
+                      "2998382932630754670573838138825217065450843010498555058"
+                      "88186560731", -1035));
+
   // Boundary cases. Boundaries themselves should round to even.
   //
   // 0x1FFFFFFFFFFFF * 2^3 = 72057594037927928