From ef25bebfa81a389deb53ab5d0cdc0466197f0179 Mon Sep 17 00:00:00 2001
From: Jason Aslakson <jason.aslakson@americastestkitchen.com>
Date: Thu, 19 Jan 2017 21:36:18 -0500
Subject: [PATCH] fix issue #5012 - Cannot read property 'declarations' of null
 (#5019)

- temporary fix
---
 .../constant-elements/destructure/actual.js         | 10 ++++++++++
 .../constant-elements/destructure/expected.js       | 13 +++++++++++++
 .../constant-elements/destructure/options.json      |  7 +++++++
 packages/babel-traverse/src/path/lib/hoister.js     |  7 ++++++-
 4 files changed, 36 insertions(+), 1 deletion(-)
 create mode 100644 packages/babel-plugin-transform-react-constant-elements/test/fixtures/constant-elements/destructure/actual.js
 create mode 100644 packages/babel-plugin-transform-react-constant-elements/test/fixtures/constant-elements/destructure/expected.js
 create mode 100644 packages/babel-plugin-transform-react-constant-elements/test/fixtures/constant-elements/destructure/options.json

diff --git a/packages/babel-plugin-transform-react-constant-elements/test/fixtures/constant-elements/destructure/actual.js b/packages/babel-plugin-transform-react-constant-elements/test/fixtures/constant-elements/destructure/actual.js
new file mode 100644
index 0000000000..fbd1ed5555
--- /dev/null
+++ b/packages/babel-plugin-transform-react-constant-elements/test/fixtures/constant-elements/destructure/actual.js
@@ -0,0 +1,10 @@
+class AnchorLink extends Component {
+  render() {
+    const { isExternal, children } = this.props;
+    if (isExternal) {
+      return (<a>{children}</a>);
+    }
+
+    return (<Link>{children}</Link>);
+  }
+}
diff --git a/packages/babel-plugin-transform-react-constant-elements/test/fixtures/constant-elements/destructure/expected.js b/packages/babel-plugin-transform-react-constant-elements/test/fixtures/constant-elements/destructure/expected.js
new file mode 100644
index 0000000000..4f730edf03
--- /dev/null
+++ b/packages/babel-plugin-transform-react-constant-elements/test/fixtures/constant-elements/destructure/expected.js
@@ -0,0 +1,13 @@
+class AnchorLink extends Component {
+  render() {
+    var _props = this.props;
+    const isExternal = _props.isExternal,
+          children = _props.children;
+
+    if (isExternal) {
+      return <a>{children}</a>;
+    }
+
+    return <Link>{children}</Link>;
+  }
+}
\ No newline at end of file
diff --git a/packages/babel-plugin-transform-react-constant-elements/test/fixtures/constant-elements/destructure/options.json b/packages/babel-plugin-transform-react-constant-elements/test/fixtures/constant-elements/destructure/options.json
new file mode 100644
index 0000000000..dc9272a969
--- /dev/null
+++ b/packages/babel-plugin-transform-react-constant-elements/test/fixtures/constant-elements/destructure/options.json
@@ -0,0 +1,7 @@
+{
+  "plugins": [
+    "syntax-jsx",
+    "transform-es2015-destructuring",
+    "transform-react-constant-elements"
+  ]
+}
diff --git a/packages/babel-traverse/src/path/lib/hoister.js b/packages/babel-traverse/src/path/lib/hoister.js
index 8a36031f1e..243e9c18ac 100644
--- a/packages/babel-traverse/src/path/lib/hoister.js
+++ b/packages/babel-traverse/src/path/lib/hoister.js
@@ -121,7 +121,12 @@ export default class PathHoister {
     do {
       if (!path.parentPath ||
           (Array.isArray(path.container) && path.isStatement()) ||
-          (path.isVariableDeclarator() && path.parentPath.node.declarations.length > 1))
+          (
+            path.isVariableDeclarator() &&
+            path.parentPath.node !== null &&
+            path.parentPath.node.declarations.length > 1
+          )
+      )
         return path;
     } while ((path = path.parentPath));
   }