Fix lexing illegal exponential, Fix for issue jerryscript-project#339

JerryScript-DCO-1.0-Signed-off-by: Ilyong Cho ily.cho@samsung.com

jerry-core/parser/js/lexer.cpp

@@ -949,7 +949,11 @@ lexer_parse_number (void)
     if (is_fp || is_exp)
     {
       ecma_number_t res = ecma_utf8_string_to_number (TOK_START (), (jerry_api_size_t) tok_length);
-      JERRY_ASSERT (!ecma_number_is_nan (res));
+
+      if (ecma_number_is_nan (res))
+      {
+        PARSE_ERROR (JSP_EARLY_ERROR_SYNTAX, "Illegal numeric literal", token_start_pos);
+      }
 
       known_token = convert_seen_num_to_token (res);
       is_token_parse_in_progress = NULL;

tests/jerry/regression-test-issue-339.js

@@ -0,0 +1,24 @@
+// Copyright 2015 Samsung Electronics Co., Ltd.
+// Copyright 2015 University of Szeged.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+try
+{
+  eval ('var y = 4e;');
+  assert (false);
+}
+catch (e)
+{
+  assert (e instanceof SyntaxError);
+}