From 127d63b343471e4e98867a0df8fb9718682cc078 Mon Sep 17 00:00:00 2001
From: flywind <43030857+xflywind@users.noreply.github.com>
Date: Tue, 10 Nov 2020 20:15:16 +0800
Subject: [PATCH] fix #12471 (#15901)

* fix #12471

* add testcase

* fix

* test nimdoc is tricky

* Delete t12471.nim

(cherry picked from commit b38f0403fd3c66fdeab3806a12e1a19bcb696e03)
---
 lib/pure/selectors.nim | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/lib/pure/selectors.nim b/lib/pure/selectors.nim
index e89cc74472..933b5491a8 100644
--- a/lib/pure/selectors.nim
+++ b/lib/pure/selectors.nim
@@ -47,6 +47,9 @@ when defined(nimdoc):
     Selector*[T] = ref object
       ## An object which holds descriptors to be checked for read/write status
 
+    IOSelectorsException* = object of CatchableError
+      ## Exception that is raised if an IOSelectors error occurs.
+
     Event* {.pure.} = enum
       ## An enum which hold event types
       Read,        ## Descriptor is available for read