From bb6ab1bb6e9595e90f1915fdde7e23904f2ba594 Mon Sep 17 00:00:00 2001
From: Osspial <osspial@gmail.com>
Date: Sun, 9 Sep 2018 14:28:16 -0400
Subject: [PATCH] Fix unreachable panic after setting ControlFlow to Poll
 during some RedrawRequested events.

---
 src/platform_impl/windows/event_loop.rs | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/platform_impl/windows/event_loop.rs b/src/platform_impl/windows/event_loop.rs
index 0c89a438d..5e89740cd 100644
--- a/src/platform_impl/windows/event_loop.rs
+++ b/src/platform_impl/windows/event_loop.rs
@@ -400,7 +400,9 @@ impl<T> EventLoopRunner<T> {
                     };
                     self.call_event_handler(Event::NewEvents(start_cause));
                 },
-                ControlFlow::Poll |
+                // This can be reached if the control flow is changed to poll during a `RedrawRequested`
+                // that was sent after `EventsCleared`.
+                ControlFlow::Poll => self.call_event_handler(Event::NewEvents(StartCause::Poll)),
                 ControlFlow::Exit => unreachable!()
             }
         }