From 13a203001434db8f6cc9e4deab10dbfc7f57bd94 Mon Sep 17 00:00:00 2001
From: flywind <xzsflywind@gmail.com>
Date: Wed, 24 Mar 2021 15:49:05 +0800
Subject: [PATCH] follow up #17486 (#17492)

* fix nim js cmp fails at CT

* follow up #17486

* test more branches

* better
---
 tests/iter/t16076.nim | 45 +++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 45 insertions(+)
 create mode 100644 tests/iter/t16076.nim

diff --git a/tests/iter/t16076.nim b/tests/iter/t16076.nim
new file mode 100644
index 0000000000..2eb4090688
--- /dev/null
+++ b/tests/iter/t16076.nim
@@ -0,0 +1,45 @@
+discard """
+  targets: "c js"
+"""
+
+proc main() =
+  block: # bug #17485
+    type
+      O = ref object
+        i: int
+
+    iterator t(o: O): int =
+      if o != nil:
+        yield o.i
+      yield 0
+
+    proc m =
+      var data = ""
+      for i in t(nil):
+        data.addInt i
+
+      doAssert data == "0"
+
+    m()
+
+
+  block: # bug #16076
+    type
+      R = ref object
+        z: int
+
+    var data = ""
+
+    iterator foo(x: int; y: R = nil): int {.inline.} =
+      if y == nil:
+        yield x
+      else:
+        yield y.z
+
+    for b in foo(10):
+      data.addInt b
+
+    doAssert data == "10"
+
+static: main()
+main()