Standard input is empty
[1 of 1] Compiling Main ( prog.hs, prog.o ) prog.hs:6:1: Duplicate type signatures for `length' at prog.hs:3:1-6 prog.hs:6:1-6 prog.hs:7:1: Multiple declarations of `length' Declared at: prog.hs:4:1 prog.hs:7:1
Standard output is empty