include ("${RunCMake_SOURCE_DIR}/check_errors.cmake") unset (errors) set(listvar a b c d) list(POP_BACK listvar) set (output "$") if (NOT output STREQUAL listvar) list (APPEND errors "returns bad value: ${output}") endif() set (output "$") if (NOT output STREQUAL "") list (APPEND errors "returns bad value: ${output}") endif() check_errors("LIST:POP_BACK..." ${errors})