skip test that fails on appveyor due to a PHP bug

Author: jiripudil

tests/Framework/Assert.snapshot.update.phpt

@@ -9,6 +9,12 @@ use Tester\Snapshot;
 
 require __DIR__ . '/../bootstrap.php';
 
+// https://bugs.php.net/bug.php?id=76801
+// fixed by https://github.com/php/php-src/pull/3965 in PHP 7.2.18
+if (strncasecmp(PHP_OS, 'win', 3) === 0 && strpos(PHP_BINARY, 'phpdbg') !== false && version_compare(PHP_VERSION, '7.2.18') < 0) {
+	Environment::skip('There is a bug in PHP :(');
+}
+
 putenv(Environment::UPDATE_SNAPSHOTS . '=1');
 Snapshot::$snapshotDir = __DIR__ . DIRECTORY_SEPARATOR . 'snapshots';
 Helpers::purge(Snapshot::$snapshotDir);