Drag the windows size with the mouse a few times lead the application crash in my mac os

[jstyarsenal]

I try to compile the examples/flutter_gallery in my mac os with flutter beta channel with command "flutter build macos" and hover command "hover build darwin-bundle". Both of these methods can compile successfully. But when I double click the darwin-bundle flutter_gallery with mouse and drag the application window size especially from top line to bottom line direction, it always crash. But I run the flutter build macos and drag the window size,I have never meet the crash problem

[pchampio]

duplicate of #133
a fix is coming soon #308