I saw that #823 was closed as a duplicate of this bug. But is it really the same?...
Event relative change filter does nothing
File db does not support pipes
It appears that this bug is harder to provoke if the TANGO database is not running...
Segfault in polled device at startup
Segmentation fault when reading attribute
Event errors persisting after server restart
Sure, here's the patch. Thanks for taking a look!