fix #6277

tests/concepts/titerable.nim

@@ -0,0 +1,20 @@
+discard """
+  nimout: "int\nint"
+  output: 15
+"""
+
+import typetraits
+
+type
+  Iterable[T] = concept x
+    for value in x:
+      type(value) is T
+
+proc sum*[T](iter: Iterable[T]): T =
+  static: echo T.name
+  for element in iter:
+    static: echo element.type.name
+    result += element
+
+echo sum([1, 2, 3, 4, 5])
+