Exception in before request hook does not allow send_error in route exception hook

I'm doing some validation in the before request hook, and would like any exception that occurs in validation to be caught normally (utilize send_error) by route exception hook. I can't seem to make it happy.

hook before => sub {
    die "We have an exception";
    # send_error("I can do it here fine");  # OK
};

hook on_route_exception => sub {
    my ($app, $error) = @_;
    send_error("Oops", 500);
};

will produce

[ABC::App:28018] core @2016-01-19 22:41:33> Entering hook core.app.before_request in (eval 61) l. 1
[ABC::App:28018] error @2016-01-19 22:41:33> Exception caught in 'core.app.before_request' filter: Hook error: We have an exception at /home/mike/dev/perl/ABC-App/bin/../lib/ABC/App.pm line 8.
 at /home/mike/perl5/perlbrew/perls/perl-5.22.1/lib/site_perl/5.22.1/Dancer2/Core/App.pm line 971. in /home/mike/perl5/perlbrew/perls/perl-5.22.1/lib/site_perl/5.22.1/Dancer2/Core/App.pm l. 526
[ABC::App:28018] error @2016-01-19 22:41:33> Route exception: Exception caught in 'core.app.before_request' filter: Hook error: We have an exception at /home/mike/dev/perl/ABC-App/bin/../lib/ABC/App.pm line 8.
 at /home/mike/perl5/perlbrew/perls/perl-5.22.1/lib/site_perl/5.22.1/Dancer2/Core/App.pm line 971.
 at /home/mike/perl5/perlbrew/perls/perl-5.22.1/lib/site_perl/5.22.1/Dancer2/Core/Role/Hookable.pm line 115. in /home/mike/perl5/perlbrew/perls/perl-5.22.1/lib/site_perl/5.22.1/Dancer2/Core/App.pm l. 1288
[ABC::App:28018] core @2016-01-19 22:41:33> Entering hook core.app.route_exception in (eval 61) l. 1
[ABC::App:28018] error @2016-01-19 22:41:33> Exception caught in 'core.app.route_exception' filter: Hook error: Function 'send_error' must be called from a route handler at /home/mike/dev/perl/ABC-App/bin/../lib/ABC/App.pm line 13.
 at /home/mike/perl5/perlbrew/perls/perl-5.22.1/lib/site_perl/5.22.1/Dancer2/Core/App.pm line 971. in /home/mike/perl5/perlbrew/perls/perl-5.22.1/lib/site_perl/5.22.1/Dancer2/Core/App.pm l. 526

Start with Dancer2/Core/App.pm around the before-request and route-exception handling shown in the trace, then inspect Dancer2/Core/Role/Hookable.pm around line 115. Reproduce the example and verify that an exception from before_request reaches on_route_exception without send_error failing.