···

       
1453
       
1453
       
 
       
                      headError = {

     

       
1454
       
1454
       
 
       
                        message = "The option `${showOption loc}` is neither a value of type `${t1.description}` nor `${t2.description}`, Definition values: ${showDefs defs}";

     

       
1455
       
1455
       
 
       
                      };

     

       
1456
       
1456
       
-
       
                      value = abort "(t.merge.v2 defs).value must only be accessed when `.headError == null`. This is a bug in code that consumes a module system type.";

     

       
1456
       
1456
       
+
       
                      value = lib.warn ''

     

       
1457
       
1457
       
+
       
                        One or more definitions did not pass the type-check of the 'either' type.

     

       
1458
       
1458
       
+
       
                        ${headError.message}

     

       
1459
       
1459
       
+
       
                        If `either`, `oneOf` or similar is used in freeformType, ensure that it is preceded by an 'attrsOf' such as: `freeformType = types.attrsOf (types.either t1 t2)`.

     

       
1460
       
1460
       
+
       
                        Otherwise consider using the correct type for the option `${showOption loc}`.  This will be an error in Nixpkgs 26.06.

     

       
1461
       
1461
       
+
       
                      '' (mergeOneOption loc defs);

     

       
1457
       
1462
       
 
       
                    };

     

       
1458
       
1463
       
 
       
              in

     

       
1459
       
1464
       
 
       
              checkedAndMerged;