Fix #313 Assertion In `Pow10.h` is triggered in Document::Parse

include/rapidjson/reader.h

@@ -929,6 +929,11 @@ private:
                     exp = exp * 10 + (s.Take() - '0');
                     if (exp > 308 && !expMinus) // exp > 308 should be rare, so it should be checked first.
                         RAPIDJSON_PARSE_ERROR(kParseErrorNumberTooBig, s.Tell());
+                    else if (exp >= 429496729 && expMinus) {        // Issue #313: prevent overflow exponent
+                        while (s.Peek() >= '0' && s.Peek() <= '9')  // Consume the rest of exponent
+                            s.Take();
+                        break;
+                    }
                 }
             }
             else

test/unittest/readertest.cpp

@@ -226,6 +226,10 @@ static void TestParseDouble() {
     TEST_DOUBLE(fullPrecision, "123e34", 123e34);                                   // Fast Path Cases In Disguise
     TEST_DOUBLE(fullPrecision, "45913141877270640000.0", 45913141877270640000.0);
     TEST_DOUBLE(fullPrecision, "2.2250738585072011e-308", 2.2250738585072011e-308); // http://www.exploringbinary.com/php-hangs-on-numeric-value-2-2250738585072011e-308/
+    TEST_DOUBLE(fullPrecision, "1e-00011111111111", 0.0);                           // Issue #313
+    TEST_DOUBLE(fullPrecision, "-1e-00011111111111", -0.0);
+    TEST_DOUBLE(fullPrecision, "1e-429496729", 0.0);                                // Maximum supported negative exponent
+    
 
     // Since
     // abs((2^-1022 - 2^-1074) - 2.2250738585072012e-308) = 3.109754131239141401123495768877590405345064751974375599...  10^-324