Set exprAllowed to false when parsing TSNonNullExpression (#7968)

2018-05-24 09:31:08 -05:00
parent 7489f8da7b
commit a94cbf760a
7 changed files with 373 additions and 1 deletions
--- a/packages/babel-parser/src/plugins/typescript.js
+++ b/packages/babel-parser/src/plugins/typescript.js
@@ -1343,7 +1343,10 @@ export default (superClass: Class<Parser>): Class<Parser> =>
      noCalls: ?boolean,
      state: N.ParseSubscriptState,
    ): N.Expression {
-      if (!this.hasPrecedingLineBreak() && this.eat(tt.bang)) {
+      if (!this.hasPrecedingLineBreak() && this.match(tt.bang)) {
+        this.state.exprAllowed = false;
+        this.next();
+
        const nonNullExpression: N.TsNonNullExpression = this.startNodeAt(
          startPos,
          startLoc,