When calling OSMesaGetProcAdress("OSMesaPixelStore") the function returns a NULL value. The reason for this is that the function table in src/mesa/drivers/osmesa/osmesa.c (which is repeated in src/gallium/state_trackers/osmesa/osmesa.c) contains an additional "s" ("OSMesaPixelsStore")
Thanks. Patch posted to mesa-dev for review.
Fixed with commit 141e1eb29fe80ad341e718147a1277cc3b1b9c11
Use of freedesktop.org services, including Bugzilla, is subject to our Code of Conduct. How we collect and use information is described in our Privacy Policy.