CMake Cache Variables should be shown, even if Configuration failed

Hi,

Qt creator should populate the GUI-field with cache variables, even if configuration fails.
To understand:

Please run the following mini CMakeLists.txt in Qt Creator

cmake_minimum_required(VERSION 3.4)
project(go)

set(MONTH_INITIAL "Please specify a month")
set(MONTH ${MONTH_INITIAL}  CACHE STRING "Please specify month")

set(MONTH_CHOICES "January" "February" "March" "April" "May" "June" "July" "August" "September" "October" "November" "December")

set_property(CACHE MONTH
  PROPERTY STRINGS ${MONTH_CHOICES})

if (NOT MONTH IN_LIST MONTH_CHOICES)
  message(FATAL_ERROR "Specify MONTH. Must be one of ${MONTH_CHOICES}")
endif()

message("######## Month is set to ${MONTH}")

It will (correctly) fail with message:

CMake Error at CMakeLists.txt:14 (message):

Specify MONTH. Must be one of
January;February;March;April;May;June;July;August;September;October;November;December

But under Project Settings, we see that the field with CMake Cache Variables is empty

This  should be improved!!

I would like to see the cache variable MONTH with value set to "Please specify a month" (which is the default via MONTH_INITIAL) and then if I click, I want to get a drop-down with the possible choices: "January", "February", etc.

The command

grep -r MONTH . 

shows the following

./CMakeCache.txt:MONTH:STRING=Please specify a month
./CMakeCache.txt://STRINGS property for variable: MONTH
./CMakeCache.txt:MONTH-STRINGS:INTERNAL=January;February;March;April;May;June;July;August;September;October;November;December

So all the information is there, even if Configuration failed. It should be displayed in the field.

PS: cmake-gui has exactly this desired behaviour:

cmake-gui /path/to/top
# then click bottom-left Configure button and choose any Generator and click Finish