From c1ca6c27d589ae108c729101d7328c35745c45e6 Mon Sep 17 00:00:00 2001
From: Matthew Brown <github@muglug.com>
Date: Tue, 13 Sep 2016 17:35:30 -0400
Subject: [PATCH] If we do not know, do not assume

---
 src/Psalm/Checker/StatementsChecker.php | 5 +----
 1 file changed, 1 insertion(+), 4 deletions(-)

diff --git a/src/Psalm/Checker/StatementsChecker.php b/src/Psalm/Checker/StatementsChecker.php
index 515100544..f1f9577e1 100644
--- a/src/Psalm/Checker/StatementsChecker.php
+++ b/src/Psalm/Checker/StatementsChecker.php
@@ -1911,10 +1911,7 @@ class StatementsChecker
         }
 
         if ($stmt->keyVar) {
-            $foreach_context->vars_in_scope[$stmt->keyVar->name] = $key_type ?: new Type\Union([
-                new Type\Atomic('int'),
-                new Type\Atomic('string')
-            ]);
+            $foreach_context->vars_in_scope[$stmt->keyVar->name] = $key_type ?: Type::getMixed();
             $foreach_context->vars_possibly_in_scope[$stmt->keyVar->name] = true;
             $this->registerVariable($stmt->keyVar->name, $stmt->getLine());
         }