From 4005bb69cbe256ed5a6151a8d44fbd4190bd6cc5 Mon Sep 17 00:00:00 2001
From: Michele Locati <michele@locati.it>
Date: Fri, 31 Jan 2020 15:59:34 +0100
Subject: [PATCH] Workaround for https://bugs.php.net/bug.php?id=66339 for
 imagexbm on PHP 5.5

---
 scripts/tests/gd.php | 13 +++++++++++--
 1 file changed, 11 insertions(+), 2 deletions(-)

diff --git a/scripts/tests/gd.php b/scripts/tests/gd.php
index 4f73b15..f7b562b 100644
--- a/scripts/tests/gd.php
+++ b/scripts/tests/gd.php
@@ -37,11 +37,20 @@ try {
             throw new Exception("{$saveFuntion}() function is missing");
         }
         $tempFile = tempnam(sys_get_temp_dir(), 'dpei');
+        ob_start();
         if ($saveFuntion($image, $tempFile) === false) {
             throw new Exception("{$saveFuntion}() failed");
         }
-        if (!is_file($tempFile) || filesize($tempFile) < 1) {
-            throw new Exception("{$saveFuntion}() created an empty file");
+        $contents = ob_get_contents();
+        ob_end_clean();
+        if (!is_file($tempFile)) {
+            throw new Exception("{$saveFuntion}() didn't create a file");
+        }
+        if (filesize($tempFile) < 1) {
+            if ($format !== 'xbm' || PHP_VERSION_ID >= 50600 || $contents === '') {
+                throw new Exception("{$saveFuntion}() created an empty file");
+            }
+            file_put_contents($tempFile, $contents);
         }
         $image2 = $loadFuntion($tempFile);
         unlink($tempFile);