close #1147

tests/concepts/tmisc_issues.nim

@@ -0,0 +1,16 @@
+discard """
+output: '''true'''
+"""
+
+# https://github.com/nim-lang/Nim/issues/1147
+type TTest = object
+  vals: seq[int]
+
+proc add*(self: var TTest, val: int) =
+  self.vals.add(val)
+
+type CAddable = concept x
+  x[].add(int)
+
+echo((ref TTest) is CAddable)
+