vc4 in 20.2-rc has regression causing app to crash
After upgrading mesa from perfectly working 20.1.8 to 20.2-rc4 app (mythtv) started to segfaulting in video playback.
Video playback is using drm_prime with EGL_LINUX_DMA_BUF_EXT in mesa.
Playback works ok on bcm3711 (rpi4) using exactly the same software stack.
OS is MiniMyth2.
HW is bcm2853 (rpi3b).
apitrace and log+gdb trace attached.