fix #12740 (#12774)

* fix #12740

* A different kind of a hack

* proper fix

* fix typo

tests/macros/tastrepr.nim

@@ -0,0 +1,43 @@
+discard """
+output: '''
+var data = @[(1, "one"), (2, "two")]
+for (i, d) in pairs(data):
+  discard
+for i, d in pairs(data):
+  discard
+for i, (x, y) in pairs(data):
+  discard
+var (a, b) = (1, 2)
+
+var data = @[(1, "one"), (2, "two")]
+for (i, d) in pairs(data):
+  discard
+for i, d in pairs(data):
+  discard
+for i, (x, y) in pairs(data):
+  discard
+var (a, b) = (1, 2)
+'''
+"""
+
+import macros
+
+macro echoTypedRepr(arg: typed) =
+  result = newCall(ident"echo", newLit(arg.repr))
+
+macro echoUntypedRepr(arg: untyped) =
+  result = newCall(ident"echo", newLit(arg.repr))
+
+template echoTypedAndUntypedRepr(arg: untyped) =
+  echoTypedRepr(arg)
+  echoUntypedRepr(arg)
+
+echoTypedAndUntypedRepr:
+  var data = @[(1,"one"), (2,"two")]
+  for (i, d) in pairs(data):
+    discard
+  for i, d in pairs(data):
+    discard
+  for i, (x,y) in pairs(data):
+    discard
+  var (a,b) = (1,2)