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Chris Wilson authored
Check for a stale backbuffer (the client didn't call DRI2GetBuffers between DRI2SwapBuffers) before asserting so that we should be more resilient with asserts enabled for client errors. References: https://bugs.freedesktop.org/show_bug.cgi?id=111197 Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
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