-- Support for property checking module TProperty where -- prop> \(l::[Bool]) -> head l -- *** Failed! (after 1 test): -- Exception: -- Prelude.head: empty list -- CallStack (from HasCallStack): -- error, called at libraries/ghc-internal/src/GHC/Internal/List.hs:2030:3 in ghc-internal:GHC.Internal.List -- errorEmptyList, called at libraries/ghc-internal/src/GHC/Internal/List.hs:96:11 in ghc-internal:GHC.Internal.List -- badHead, called at libraries/ghc-internal/src/GHC/Internal/List.hs:90:28 in ghc-internal:GHC.Internal.List -- head, called at :1:27 in interactive:Ghci2 -- []