Email Sanitizer permits leading $ which is not a valid selector

[jefhar]

We've run into an issue where an email with a leading $ cannot be used to fetch a user.

An email address containing a $ is technically legal. However, starting the email address with that character breaks ProcessWire, and the Sanitizer returns a string with a leading $.

use function ProcessWire\wire;

$email = '[email protected]';
$email = wire('sanitizer')->email($email); // "[email protected]"
wire('users')->get('email=' . $email);

>>  ProcessWire\WireException  Unrecognized operator: $.

Adding a $ to the middle of an email address does not break the selector.

use function ProcessWire\wire;

$email = '[email protected]';
$email = wire('sanitizer')->email($email); "ema$il@example.net"
wire('users')->get('email=' . $email);

>> ProcessWire\NullPage