overloading of '=' works

tests/assign/toverload_asgn2.nim

@@ -0,0 +1,22 @@
+discard """
+  output: '''i value 88
+2aa'''
+"""
+
+import moverload_asgn2
+
+proc passAround(i: int): Concrete =
+  echo "i value ", i
+  result = Concrete(a: "aa", b: "bb", rc: 0)
+
+proc main =
+  let
+    i = 88
+    v = passAround(i)
+    z = v.a
+  var
+    x: Concrete
+  x = v
+  echo x.rc, z # 2aa
+
+main()