Test: /ext/standard/tests/streams/user-stream-error.phpt - Version 7.3.20    

003- #0 [internal function]: FailStream->stream_open('mystream://foo', 'r', 0, NULL)

004- #1 %s%euser-stream-error.php(%d): fopen('mystream://foo', 'r')

005- #2 {main}