From 0f685d9b4232743ccafa796f433301aae61764bc Mon Sep 17 00:00:00 2001
From: Daniel Tschinder <daniel@tschinder.de>
Date: Sun, 10 Feb 2019 14:22:26 -0800
Subject: [PATCH] Only allow Identifiers, Patterns and Rest in parameters of
 FunctionDeclarations

---
 packages/babel-types/src/definitions/core.js | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/packages/babel-types/src/definitions/core.js b/packages/babel-types/src/definitions/core.js
index 671e896144..a92e8d2725 100644
--- a/packages/babel-types/src/definitions/core.js
+++ b/packages/babel-types/src/definitions/core.js
@@ -288,7 +288,14 @@ export const functionCommon = {
   params: {
     validate: chain(
       assertValueType("array"),
-      assertEach(assertNodeType("LVal")),
+      assertEach(
+        assertNodeType(
+          "Identifier",
+          "Pattern",
+          "RestElement",
+          "TSParameterProperty",
+        ),
+      ),
     ),
   },
   generator: {