From c86fdfa1ee2cbba201b0a6182212ced5e218dc65 Mon Sep 17 00:00:00 2001
From: flywind <xzsflywind@gmail.com>
Date: Sun, 28 Mar 2021 15:57:22 +0800
Subject: [PATCH] add testcase for #9466 (#17538)

---
 tests/notnil/tnotnil5.nim | 28 ++++++++++++++++++++++++++++
 1 file changed, 28 insertions(+)
 create mode 100644 tests/notnil/tnotnil5.nim

diff --git a/tests/notnil/tnotnil5.nim b/tests/notnil/tnotnil5.nim
new file mode 100644
index 0000000000..2dcb7f7c3e
--- /dev/null
+++ b/tests/notnil/tnotnil5.nim
@@ -0,0 +1,28 @@
+discard """
+  matrix: "--threads:on"
+"""
+
+{.experimental: "parallel".}
+{.experimental: "notnil".}
+import threadpool
+
+type
+  AO = object
+    x: int
+
+  A = ref AO not nil
+
+proc process(a: A): A =
+  return A(x: a.x+1)
+
+proc processMany(ayys: openArray[A]): seq[A] =
+  var newAs: seq[FlowVar[A]]
+
+  parallel:
+    for a in ayys:
+      newAs.add(spawn process(a))
+  for newAflow in newAs:
+    let newA = ^newAflow
+    if isNil(newA):
+      return @[]
+    result.add(newA)