Replication steps:
Go into mod/assign/lib.php and put the following function right at the end:

function mod_assign_before_footer() {

echo '<br>';

echo '<br>';

$thing = [

(object) ['id' => 1, 'name' => 'awesome'],

(object) ['id' => 2, 'name' => 'excellent']

];

print_object($thing);

throw new coding_exception('hello');

}

• Now go and visit an assignment activity.

Expectation: The printed output should be formatted in a way similar to before the changes made to print_object() in MDL-32278
Result: Content that is not as well formatted.