Limit the number of arguments in a function call to 32766.

src/parser.cc

Index: src/parser.cc
diff --git a/src/parser.cc b/src/parser.cc
index 41a8234c29a9f0859d406fd862502619970d56d2..cce337fb46d448b23c60f958b88d644f7cc851e0 100644
--- a/src/parser.cc
+++ b/src/parser.cc
@@ -3505,6 +3505,12 @@ ZoneList<Expression*>* Parser::ParseArguments(bool* ok) {
   while (!done) {
     Expression* argument = ParseAssignmentExpression(true, CHECK_OK);
     result->Add(argument);
+    if (result->length() > kMaxNumFunctionParameters) {
+      ReportMessageAt(scanner().location(), "too_many_arguments",
+                      Vector<const char*>::empty());
+      *ok = false;
+      return NULL;
+    }
     done = (peek() == Token::RPAREN);
     if (!done) Expect(Token::COMMA, CHECK_OK);
   }