https://bugs.freedesktop.org/show_bug.cgi?id=107857
--- Comment #1 from Józef Kucia joseph.kucia@gmail.com --- GS_EMIT without shader outputs seems to cause GPU hangs. Radeonsi generates shaders with GS_EMIT without writing shader outputs when geometry shader outputs are optimized out.
a potential fix: https://lists.freedesktop.org/archives/mesa-dev/2018-September/205848.html piglit test: https://lists.freedesktop.org/archives/piglit/2018-September/025092.html