This one https://cgit.freedesktop.org/mesa/mesa/commit/?id=ec6c2297634eba77248a929048cf4201887a5f0a ? or https://cgit.freedesktop.org/mesa/mesa/commit/?id=a3c202de0a963c0562796cf75e3a9b3eedf1afad ? Any chance you can install the debug symbols ?