From 544d494c8930e758faf5e42bd7d79b768ff66ae0 Mon Sep 17 00:00:00 2001
From: Tan Li Hau <tanhauhau@users.noreply.github.com>
Date: Tue, 15 Oct 2019 09:50:08 +0800
Subject: [PATCH] Update packages/babel-parser/src/plugins/typescript/index.js
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Co-Authored-By: Nicolò Ribaudo <nicolo.ribaudo@gmail.com>
---
 packages/babel-parser/src/plugins/typescript/index.js | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/packages/babel-parser/src/plugins/typescript/index.js b/packages/babel-parser/src/plugins/typescript/index.js
index 7ebe0ad44420..8bf6e47716a2 100644
--- a/packages/babel-parser/src/plugins/typescript/index.js
+++ b/packages/babel-parser/src/plugins/typescript/index.js
@@ -921,7 +921,7 @@ export default (superClass: Class<Parser>): Class<Parser> =>
           // : asserts foo
           const node = this.startNodeAtNode(t);
           node.parameterName = this.parseIdentifier();
-          node.assertsModifier = assertsModifier;
+          node.assertsModifier = true;
           t.typeAnnotation = this.finishNode(node, "TSTypePredicate");
           return this.finishNode(t, "TSTypeAnnotation");
         }