This does fix the exception from#49014 BUT it doesn't do what a browser does, and it might break the application behind the form. Instead of sending an empty/non-file, it sends the file field as a normal field with empty string:

$_POST:Array(    [op] => Submit it    [values] => Array        (            [text] => Oele        )    [file] => )

(see the[file]) What it should do is what a real browser does: send a non-file, or whatever you would call that:

$_POST:Array(    [op] => Submit it    [values] => Array        (            [text] => asd        ))$_FILES:Array(    [file] => Array        (            [name] =>             [full_path] =>             [type] =>             [tmp_name] =>             [error] => 4            [size] => 0        ))

file is in the $_FILES list, with error 4:UPLOAD_ERR_NO_FILE:https://www.php.net/manual/en/features.file-upload.errors.php#features.file-upload.errors That's what happens if you submit a file field without file.

IMO deleting the file from the form is a better solution than the empty string, but sending the non-file would be even more realistic, but I don't know how symfony/curl would do that.

Closing in favor of#59752, thanks for having a look!