ContextStack1.hs:10:5:
    Reduction stack overflow; size = 11
    When simplifying the following type: Cls [[[[[[[[[[()]]]]]]]]]]
    Use -freduction-depth=0 to disable this check
    (any upper bound you could choose might fail unpredictably with
     minor updates to GHC, so disabling the check is recommended if
     you're sure that type checking should terminate)
    In the expression: meth
    In an equation for ‘t’: t = meth