From 4eb68bf63f1791b7e108f6a8516ad92f4777cdd9 Mon Sep 17 00:00:00 2001
From: Vladimir Razuvaev <vladimir.razuvaev@gmail.com>
Date: Sat, 3 Jun 2017 14:04:47 +0700
Subject: [PATCH] Do not parse invalid input strings as floats (see #125)

---
 src/Type/Definition/FloatType.php | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/Type/Definition/FloatType.php b/src/Type/Definition/FloatType.php
index 363ce27..fb6ce02 100644
--- a/src/Type/Definition/FloatType.php
+++ b/src/Type/Definition/FloatType.php
@@ -67,7 +67,7 @@ values as specified by
     public function parseLiteral($ast)
     {
         if ($ast instanceof FloatValueNode || $ast instanceof IntValueNode) {
-            return (float) $ast->value;
+            return is_numeric($ast->value) ? (float) $ast->value : null;
         }
         return null;
     }