This bug was fixed in the package sip4 - 4.17+dfsg-1ubuntu0.1
--------------- sip4 (4.17+dfsg-1ubuntu0.1) xenial; urgency=medium
* Fixed issues with C/C++ member variable getters and setters. This restores the keeping of a reference to the containing object in the instance of a contained class (LP: #1861601).
-- Dmitry Shachnev <email address hidden> Sun, 15 Mar 2020 19:23:54 +0300
This bug was fixed in the package sip4 - 4.17+dfsg- 1ubuntu0. 1
--------------- 1ubuntu0. 1) xenial; urgency=medium
sip4 (4.17+dfsg-
* Fixed issues with C/C++ member variable getters and setters. This
restores the keeping of a reference to the containing object in the
instance of a contained class (LP: #1861601).
-- Dmitry Shachnev <email address hidden> Sun, 15 Mar 2020 19:23:54 +0300