Merged: Disallow tail calls from async functions and generators

src/parsing/parser-base.h

Index: src/parsing/parser-base.h
diff --git a/src/parsing/parser-base.h b/src/parsing/parser-base.h
index 9d73486ed35b094f9ec85ace8c59e4f765890825..669defa27f0fdf1f1c4555412ee07198138defa5 100644
--- a/src/parsing/parser-base.h
+++ b/src/parsing/parser-base.h
@@ -2500,6 +2500,12 @@ ParserBase<Traits>::ParseTailCallExpression(ExpressionClassifier* classifier,
     *ok = false;
     return Traits::EmptyExpression();
   }
+  if (is_resumable()) {
+    Scanner::Location sub_loc(sub_expression_pos, loc.end_pos);
+    ReportMessageAt(sub_loc, MessageTemplate::kUnexpectedTailCall);
+    *ok = false;
+    return Traits::EmptyExpression();
+  }
   ReturnExprContext return_expr_context =
       function_state_->return_expr_context();
   if (return_expr_context != ReturnExprContext::kInsideValidReturnStatement) {