When using the TableCell helper in the Console Component, if I pass a numeric value as the first parameter of the constructor, then render the table, PHP throws an error:

Method Symfony\Component\Console\Helper\TableCell::__toString() must return a string value

Sample code:

$table = new Table($output);
$table->setRows([[new TableCell(12345)]]);
$table->render();

Casting to a string (either in the TableCell helper, or before the value is passed to the constructor) fixes it.