Alt-Tab away from OpenMW causes OpenGL errors (many) and freezes.
This is regarding OpenMW development version downloaded today. Alt-Tabbing away from the game freezes it. I can return to the game but the game screen is frozen. I can Alt-Tab away again, but that window is unresponsive. I have to kill it through Task Manager.
The problem is 100% repeatable on my Windows 10 machine. 100% as in it never fails to happen. Leaving the game window breaks play every time whether full screen or windows. This has never happened on OpenMW .48. Ever. .48 is a rock :)
openmw.log contains varying instances (sometimes several hundred) of this pair:
[19:52:31.457 W] Warning: detected OpenGL error 'invalid framebuffer operation' at after TransparentDepthBinCallback::drawImplementation
[19:52:31.458 W] Warning: detected OpenGL error 'invalid framebuffer operation' at after DepthClearCallback::drawImplementation
and
[20:13:24.155 W] Warning: detected OpenGL error 'invalid value' at after RenderBin::draw(..)
[20:13:24.155 W] RenderStage::drawInner(,) FBO status = 0x8cd7
Well, one can see for himself. I will attach the .log file.