Sinatra 2 is no longer able to display custom show_exception

[ujifgc]

According to rack/rack#836 (discussion) and rack/rack#922 (actual PR) Rack 2 is now using pre-compiled constant TEMPLATE to render it's show_exception while Sinatra still expects Rack to load it from @template variable.

The corresponding test is shut up by this commit: fad3619

If this is official stance of Sinatra 2 to no longer provide custom exception HTML, then file https://github.com/sinatra/sinatra/blob/master/lib/sinatra/show_exceptions.rb is no longer needed.

[zzak]

@ujifgc I'm not sure our stance, can you give an example?

[ujifgc]

require 'sinatra'

enable :show_exceptions

get '/hi' do
  raise 'exception'
end

On Sinatra 1 and Rack 1 this code shows Sinatra exception page.
On Sinatra 2 alpha and Rack 2 alpha this code shows Rack exception page.

[zzak]

:( can confirm