no diag

test.pl

use Test2::Bundle::Extended;

use Test2::API qw/test2_stack/;

test2_stack->top->filter(
    sub {
        my ($hub, $event) = @_; 
        return if $event->isa('Test2::Event::Diag');
        return $event;
    },  
    inherit => 1,
);

ok(0, "See failure, but not the diag");
diag "Will not see this"

done_testing;