From b83f540b153ab9830db73be77c608358e428ecde Mon Sep 17 00:00:00 2001
From: Brown <github@muglug.com>
Date: Wed, 8 May 2019 11:03:47 -0400
Subject: [PATCH] Prevent crash when iterator class does not exist

---
 src/Psalm/Internal/Analyzer/Statements/Block/ForeachAnalyzer.php | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/Psalm/Internal/Analyzer/Statements/Block/ForeachAnalyzer.php b/src/Psalm/Internal/Analyzer/Statements/Block/ForeachAnalyzer.php
index 193efb6601c..29342045f7f 100644
--- a/src/Psalm/Internal/Analyzer/Statements/Block/ForeachAnalyzer.php
+++ b/src/Psalm/Internal/Analyzer/Statements/Block/ForeachAnalyzer.php
@@ -585,6 +585,7 @@ public static function handleIterable(
                                 $value_type_part = $array_atomic_type->type_params[1];
                             } else {
                                 if ($array_atomic_type instanceof Type\Atomic\TNamedObject
+                                    && $codebase->classExists($array_atomic_type->value)
                                     && $codebase->classImplements(
                                         $array_atomic_type->value,
                                         'Traversable'