From 2d32cddabf5a78b1c6943d60781c192666a1bd2c Mon Sep 17 00:00:00 2001
From: Rich Harris <richard.a.harris@gmail.com>
Date: Wed, 14 Dec 2016 15:54:14 -0500
Subject: [PATCH] implement gatherPossibleValues on ExternalDeclaration - fixes
 #957

---
 src/Declaration.js                              |  4 ++++
 test/function/call-external-function/_config.js | 11 +++++++++++
 test/function/call-external-function/foo.js     |  2 ++
 test/function/call-external-function/main.js    |  4 ++++
 4 files changed, 21 insertions(+)
 create mode 100644 test/function/call-external-function/_config.js
 create mode 100644 test/function/call-external-function/foo.js
 create mode 100644 test/function/call-external-function/main.js

diff --git a/src/Declaration.js b/src/Declaration.js
index 1d13315..88f5553 100644
--- a/src/Declaration.js
+++ b/src/Declaration.js
@@ -116,6 +116,10 @@ export class ExternalDeclaration {
 		}
 	}
 
+	gatherPossibleValues ( values ) {
+		values.add( UNKNOWN );
+	}
+
 	getName ( es ) {
 		if ( this.name === '*' ) {
 			return this.module.name;
diff --git a/test/function/call-external-function/_config.js b/test/function/call-external-function/_config.js
new file mode 100644
index 0000000..9694314
--- /dev/null
+++ b/test/function/call-external-function/_config.js
@@ -0,0 +1,11 @@
+module.exports = {
+	description: 'handles call of aliased external function (#957)',
+	warnings () {},
+	context: {
+		require ( id ) {
+			if ( id === 'foo' ) {
+				return () => 42;
+			}
+		}
+	}
+};
diff --git a/test/function/call-external-function/foo.js b/test/function/call-external-function/foo.js
new file mode 100644
index 0000000..a430876
--- /dev/null
+++ b/test/function/call-external-function/foo.js
@@ -0,0 +1,2 @@
+import foo from 'foo';
+export default foo;
diff --git a/test/function/call-external-function/main.js b/test/function/call-external-function/main.js
new file mode 100644
index 0000000..766cb6f
--- /dev/null
+++ b/test/function/call-external-function/main.js
@@ -0,0 +1,4 @@
+import foo_ from './foo.js';
+
+var foo = foo_;
+assert.equal( foo(), 42 );