1 files changed, 12 insertions, 3 deletions
diff --git a/node_modules/tslint/lib/rules/noEmptyInterfaceRule.js b/node_modules/tslint/lib/rules/noEmptyInterfaceRule.js
index ae42d72e6..f23f3aade 100644
--- a/node_modules/tslint/lib/rules/noEmptyInterfaceRule.js
+++ b/node_modules/tslint/lib/rules/noEmptyInterfaceRule.js
@@ -48,11 +48,20 @@ function walk(ctx) {
     return ts.forEachChild(ctx.sourceFile, function cb(node) {
         if (tsutils_1.isInterfaceDeclaration(node) &&
             node.members.length === 0 &&
-            (node.heritageClauses === undefined ||
-                // allow interfaces that extend 2 or more interfaces
-                node.heritageClauses[0].types.length < 2)) {
+            (node.heritageClauses === undefined || extendsOneTypeWithoutTypeArguments(node.heritageClauses[0]))) {
             return ctx.addFailureAtNode(node.name, node.heritageClauses !== undefined ? Rule.FAILURE_STRING_FOR_EXTENDS : Rule.FAILURE_STRING);
         }
         return ts.forEachChild(node, cb);
     });
 }
+function extendsOneTypeWithoutTypeArguments(_a) {
+    var types = _a.types;
+    switch (types.length) {
+        case 0:
+            return true; // don't crash on empty extends list
+        case 1:
+            return types[0].typeArguments === undefined; // allow interfaces that provide type arguments for the extended type
+        default:
+            return false; // allow interfaces extending more than one types
+    }
+}