From 932734c89a4b9d86c43623bee462d546d7c065fe Mon Sep 17 00:00:00 2001
From: Paul-Licameli <paul.licameli@gmail.com>
Date: Sun, 12 Aug 2018 14:43:45 -0400
Subject: [PATCH] Windows: don't crash if double-clicking on ruler during
 playback

---
 src/widgets/Ruler.cpp | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/src/widgets/Ruler.cpp b/src/widgets/Ruler.cpp
index 57af3f9a4..464766518 100644
--- a/src/widgets/Ruler.cpp
+++ b/src/widgets/Ruler.cpp
@@ -3087,6 +3087,12 @@ auto AdornedRulerPanel::QPHandle::Release
 (const TrackPanelMouseEvent &event, AudacityProject *pProject,
  wxWindow *pParent) -> Result
 {
+   // Keep a shared pointer to self.  Otherwise *this might get deleted
+   // in HandleQPRelease on Windows!  Because there is an event-loop yield
+   // stopping playback, which caused OnCaptureLost to be called, which caused
+   // clearing of CellularPanel targets!
+   auto saveMe = mParent->mQPCell->mHolder.lock();
+
    auto result = CommonRulerHandle::Release(event, pProject, pParent);
    if (!( result & RefreshCode::Cancelled )) {
       if (mClicked == Button::Left) {