From a67800cac7b66fda60ac5cf68da050b5839d26c3 Mon Sep 17 00:00:00 2001
From: Matt Brown <mattb@vimeo.com>
Date: Thu, 19 Jan 2017 15:00:05 -0500
Subject: [PATCH] Ignore cloning of mixed variables

---
 src/Psalm/Checker/Statements/ExpressionChecker.php | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/src/Psalm/Checker/Statements/ExpressionChecker.php b/src/Psalm/Checker/Statements/ExpressionChecker.php
index bc64da303..ab5c4cfc5 100644
--- a/src/Psalm/Checker/Statements/ExpressionChecker.php
+++ b/src/Psalm/Checker/Statements/ExpressionChecker.php
@@ -1697,7 +1697,10 @@ class ExpressionChecker
 
         if (isset($stmt->expr->inferredType)) {
             foreach ($stmt->expr->inferredType->types as $clone_type_part) {
-                if (!$clone_type_part instanceof TNamedObject && !$clone_type_part instanceof TObject) {
+                if (!$clone_type_part instanceof TNamedObject &&
+                    !$clone_type_part instanceof TObject &&
+                    !$clone_type_part instanceof TMixed
+                ) {
                     if (IssueBuffer::accepts(
                         new InvalidClone(
                             'Cannot clone ' . $clone_type_part,