fixes #1919

compiler/semtypes.nim

@@ -609,12 +609,6 @@ proc addInheritedFieldsAux(c: PContext, check: var IntSet, pos: var int,
     inc(pos)
   else: internalError(n.info, "addInheritedFieldsAux()")
 
-proc addInheritedFields(c: PContext, check: var IntSet, pos: var int, 
-                        obj: PType) = 
-  if (sonsLen(obj) > 0) and (obj.sons[0] != nil): 
-    addInheritedFields(c, check, pos, obj.sons[0])
-  addInheritedFieldsAux(c, check, pos, obj.n)
-
 proc skipGenericInvokation(t: PType): PType {.inline.} = 
   result = t
   if result.kind == tyGenericInvokation:
@@ -622,6 +616,13 @@ proc skipGenericInvokation(t: PType): PType {.inline.} =
   if result.kind == tyGenericBody:
     result = lastSon(result)
 
+proc addInheritedFields(c: PContext, check: var IntSet, pos: var int, 
+                        obj: PType) =
+  assert obj.kind == tyObject
+  if (sonsLen(obj) > 0) and (obj.sons[0] != nil): 
+    addInheritedFields(c, check, pos, obj.sons[0].skipGenericInvokation)
+  addInheritedFieldsAux(c, check, pos, obj.n)
+
 proc semObjectNode(c: PContext, n: PNode, prev: PType): PType =
   if n.sonsLen == 0: return newConstraint(c, tyObject)
   var check = initIntSet()

tests/generics/tgeneric_inheritance.nim

@@ -0,0 +1,19 @@
+discard """
+  output: '0.0'
+"""
+
+# bug #1919
+
+type
+  Base[M] = object of RootObj
+    a : M
+
+  Sub1[M] = object of Base[M]
+    b : int
+
+  Sub2[M] = object of Sub1[M]
+    c : int
+
+var x: Sub2[float]
+
+echo x.a