From c84b91de2b628123cf9180bc3aacd9e8033e7a18 Mon Sep 17 00:00:00 2001
From: Sara Itani <sitani@microsoft.com>
Date: Fri, 24 Mar 2017 10:30:34 -0700
Subject: [PATCH] Fix exception during definition resolution

---
 src/TolerantDefinitionResolver.php | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/src/TolerantDefinitionResolver.php b/src/TolerantDefinitionResolver.php
index 1271405..7b60ff9 100644
--- a/src/TolerantDefinitionResolver.php
+++ b/src/TolerantDefinitionResolver.php
@@ -576,6 +576,11 @@ class TolerantDefinitionResolver implements DefinitionResolverInterface
      */
     public function resolveExpressionNodeToType($expr): Type
     {
+        if (!($expr instanceof Tolerant\Node)) {
+            // TODO some members are null or Missing/SkippedToken
+            // How do we handle this more generally?
+            return new Types\Mixed;
+        }
         if ($expr instanceof Tolerant\Node\Expression\Variable || $expr instanceof Tolerant\Node\UseVariableName) {
             if ($expr instanceof Tolerant\Node\Expression\Variable && $expr->getName() === 'this') {
                 return new Types\This;