Fix new type errors (#754)

2017-10-10 14:11:28 -07:00
parent 6fc9af52ca
commit 0fbf3a61fb
3 changed files with 5 additions and 4 deletions
--- a/src/parser/statement.js
+++ b/src/parser/statement.js
@@ -487,7 +487,8 @@ export default class StatementParser extends ExpressionParser {
      if (this.match(tt.parenL)) {
        this.expect(tt.parenL);
        clause.param = this.parseBindingAtom();
-        this.checkLVal(clause.param, true, Object.create(null), "catch clause");
+        const clashes: any = Object.create(null);
+        this.checkLVal(clause.param, true, clashes, "catch clause");
        this.expect(tt.parenR);
      } else {
        this.expectPlugin("optionalCatchBinding");