Prevent un-parsed LiteralFunction reaching the compiler.

src/parsing/preparser.cc

Index: src/parsing/preparser.cc
diff --git a/src/parsing/preparser.cc b/src/parsing/preparser.cc
index 8b059b1bea0e320c149c6c5426a837ebe9f55a3a..e4c30841edc144f301e20b1fc10db46a00ba7123 100644
--- a/src/parsing/preparser.cc
+++ b/src/parsing/preparser.cc
@@ -984,9 +984,8 @@ PreParser::Expression PreParser::ParseFunctionLiteral(
 
   // See Parser::ParseFunctionLiteral for more information about lazy parsing
   // and lazy compilation.
-  bool is_lazily_parsed =
-      (outer_is_script_scope && allow_lazy() && !parenthesized_function_);
-  parenthesized_function_ = false;
+  bool is_lazily_parsed = (outer_is_script_scope && allow_lazy() &&
+                           !function_state_->this_function_is_parenthesized());
 
   Expect(Token::LBRACE, CHECK_OK);
   if (is_lazily_parsed) {