fix #5648

tests/types/t5648.nim

@@ -0,0 +1,21 @@
+discard """
+output: "ptr Foo"
+"""
+
+import typetraits
+
+type Foo = object
+  bar*: int
+
+proc main() =
+  var f = create(Foo)
+  f.bar = 3
+  echo f.type.name
+
+  discard realloc(f, 0)
+
+  var g = Foo()
+  g.bar = 3
+
+main()
+