https://bugs.freedesktop.org/show_bug.cgi?id=75732
--- Comment #2 from Michel Dänzer michel@daenzer.net --- (In reply to comment #1)
Having recompiled the current Mesa from git, it looks as if radeon_winsys_destroy() in src/gallium/winsys/radeon/drm/radeon_drm_winsys.c is not being called on exit.
That only explains 352 leaked bytes though, over the whole lifetime of the celestia process.
Please describe the problem in more detail. Why do you think there is a leak?