undefined index $ error when excel has an autofilter

[ghost]

This is:

• [x ] a bug report

What is the expected behavior?

Importing an Excel with autofilter should work.

What is the current behavior?

undefined index $ error is generated.

What are the steps to reproduce?

Take one Excel file, add autofilter to first row. And try to load.

Which versions of PhpSpreadsheet and PHP are affected?

1.6.0

[stale]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs.
If this is still an issue for you, please try to help by debugging it further and sharing your results.
Thank you for your contributions.

[lxShaDoWxl]

This problem actual in version 1.9.0
If added filter in google spreadsheets and download file
https://docs.google.com/spreadsheets/d/1qQhpDrSh9VGqNqrl22nDE7UQBaOL2NrIucq7vUkto_c/edit?usp=sharing
to error
PHP Notice: Undefined index: $ in vendor/phpoffice/phpspreadsheet/src/PhpSpreadsheet/Cell/Coordinate.php on line 282

example code

use PhpOffice\PhpSpreadsheet\IOFactory;

require __DIR__.'/vendor/autoload.php';

$path = __DIR__.'/test2.xlsx';
/** @var \PhpOffice\PhpSpreadsheet\Reader\Xlsx $reader */
$reader = IOFactory::createReaderForFile($path);
$phpSpreadsheet = $reader->load($path);
$sheet = $phpSpreadsheet->getSheet(1);```

[astronati]

IMHO It should be fixed by #1326