"power" Main: Results: revert ? (Pz) ==> ! Main.hs:(103,0)-(105,48): Non-exhaustive patterns in function revert revert ? (Pz) ==> ! Main.hs:(103,0)-(105,48): Non-exhaustive patterns in function revert revert ? (Pz) ==> ! Main.hs:(103,0)-(105,48): Non-exhaustive patterns in function revert revert ? (Pz) ==> ! Main.hs:(103,0)-(105,48): Non-exhaustive patterns in function revert revert ? (Pz) ==> ! Main.hs:(103,0)-(105,48): Non-exhaustive patterns in function revert revert ? (Pz) ==> ! Main.hs:(103,0)-(105,48): Non-exhaustive patterns in function revert Writing: Main.hs.html Writing: hpc_index.html Writing: hpc_index_fun.html Writing: hpc_index_alt.html Writing: hpc_index_exp.html ["Main.hs"]