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<interactive>:11:1:
No instance for (Show a1) arising from a use of ‘print’
Cannot resolve unknown runtime type ‘a1’
Use :print or :force to determine these types
Relevant bindings include it :: a1 (bound at <interactive>:11:1)
Note: there are several potential instances:
instance Show Unary -- Defined at ../Test.hs:37:29
instance Show a => Show (MkT2 a) -- Defined at ../Test.hs:20:12
instance Show a => Show (MkT a) -- Defined at ../Test.hs:17:13
...plus 30 others
In a stmt of an interactive GHCi command: print it
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