fixes #584

tests/effects/teffects6.nim

@@ -4,7 +4,7 @@ type
   PMenuItem = ref object
 
 proc createMenuItem*(menu: PMenu, label: string, 
-                     action: proc (i: PMenuItem, p: pointer) {.cdecl.}) = nil
+                    action: proc (i: PMenuItem, p: pointer) {.cdecl.}) = discard
 
 var s: PMenu
 createMenuItem(s, "Go to definition...",

tests/notnil/tnotnil3.nim

@@ -0,0 +1,35 @@
+discard """
+  errormsg: "cannot prove 'variable' is not nil"
+  line: 31
+"""
+
+# bug #584
+# Testprogram for 'not nil' check
+
+const testWithResult = true
+
+type
+  A = object
+  B = object
+  C = object
+    a: ref A
+    b: ref B
+
+
+proc testNotNil(c: ref C not nil) =
+  discard
+
+
+when testWithResult:
+  proc testNotNilOnResult(): ref C =
+    new(result)
+    #result.testNotNil() # Here 'not nil' can't be proved
+
+
+var variable: ref C
+new(variable)
+variable.testNotNil() # Here 'not nil' is proved
+
+when testWithResult:
+  discard testNotNilOnResult()
+