--TEST--
Bug #73737 (Crash when parsing a tag format)
--EXTENSIONS--
exif
--FILE--
<?php
    $exif = exif_thumbnail(__DIR__ . '/bug73737.tiff');
    var_dump($exif);
?>
--EXPECTF--
Warning: exif_thumbnail(bug73737.tiff): Process tag(x0100=ImageWidth): Cannot be empty in %s on line %d

Warning: exif_thumbnail(bug73737.tiff): Error in TIFF: filesize(x0030) less than start of IFD dir(x10102) in %s line %d
bool(false)
