[parser] Use scope flags to check arguments (#10801)

* chore: add test case Co-authored-by: Jens Maier<jens@elberet.de> * use scope flags to check arguments
2019-12-05 02:23:53 -05:00
parent a0bed42aec
commit c6e966cac9
8 changed files with 664 additions and 2 deletions
--- a/packages/babel-parser/src/parser/expression.js
+++ b/packages/babel-parser/src/parser/expression.js
@@ -2208,7 +2208,11 @@ export default class ExpressionParser extends LValParser {
      }
    }

-    if (this.state.inClassProperty && word === "arguments") {
+    if (
+      this.scope.inClass &&
+      !this.scope.inNonArrowFunction &&
+      word === "arguments"
+    ) {
      this.raise(
        startLoc,
        "'arguments' is not allowed in class field initializer",