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Recently, we found that cv-cat view stopped working properly, when used several times in the same cv-cat call.

Something like

> cat images.bin | cv-cat "view;invert;view;null"

would either crash or behave in undefined way. All our debugging has pointed to some sort of race condition in the underlying cv::imshow() call or deeper in X-windows-related stuff, thus, at the moment, it seems to be out of our control.

Use the following instead:

> cat images.bin | cv-cat "view;invert" | cv-cat "view;null"
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