Gracefully handle syntax errors in Parser::PatternRewriter.

test/cctest/test-parsing.cc

 // Copyright 2012 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 7964 matching lines @@
 }
 
 
 TEST(MiscSyntaxErrors) {
   const char* context_data[][2] = {
       {"'use strict'", ""}, {"", ""}, {NULL, NULL}};
   const char* error_data[] = {"for (();;) {}", NULL};
 
   RunParserSyncTest(context_data, error_data, kError, NULL, 0, NULL, 0);
 }
+
+TEST(PatternSyntaxError) {
+  v8::V8::Initialize();
+  v8::HandleScope scope(CcTest::isolate());
+  v8::Context::Scope context_scope(v8::Context::New(CcTest::isolate()));
+
+  const char* sources[] = {
+      // crbug.com/582626
+      "{ NaN ,chA((evarA=new t ( l = !.0[((... co -a0([1]))=> greturnkf",
+
+      // Simplified case:
+      "(...rest - a) => b",
+  };
+
+  for (int i = 0; i < arraysize(sources); i++) {
+    v8::TryCatch try_catch(CcTest::isolate());
+    v8_compile(v8_str(sources[i]));
+    CHECK(try_catch.HasCaught());
+    v8::String::Utf8Value exception(try_catch.Exception());
+    CHECK_EQ(0, strcmp("SyntaxError: Not supported", *exception));
+  }
+}