[async-functions] support await expressions in finally statements

src/parsing/preparser.cc

Index: src/parsing/preparser.cc
diff --git a/src/parsing/preparser.cc b/src/parsing/preparser.cc
index 95c12c698545c70e7a763d42c16a238f3d33106c..1da632f0d00a63c7313b430d5c1178033da13904 100644
--- a/src/parsing/preparser.cc
+++ b/src/parsing/preparser.cc
@@ -231,10 +231,11 @@ PreParser::Expression PreParser::ParseFunctionLiteral(
 
   // Parse function body.
   PreParserStatementList body;
+  BlockT parameter_init_block = NullBlock();
   int pos = function_token_pos == kNoSourcePosition ? peek_position()
                                                     : function_token_pos;
-  ParseFunctionBody(body, function_name, pos, formals, kind, function_type,
-                    CHECK_OK);
+  ParseFunctionBody(body, &parameter_init_block, function_name, pos, formals,
+                    kind, function_type, CHECK_OK);
 
   // Parsing the body may change the language mode in our scope.
   language_mode = function_scope->language_mode();