$date
Sun Jul 30 13:12:36 2023
$end
$version
Riviera-PRO Version 2022.04.117.8517
$end
$timescale
1 ns
$end

$scope module testMux $end
$var wire 1 ! out $end
$var reg 1 " a $end
$var reg 1 # b $end
$var reg 1 $ sel $end
$upscope $end

$enddefinitions $end
$dumpvars
1!
1"
0#
0$
$end
#5
1$
0!
#10