It's easily reproducable by attached python script on default build of master (SS). [nbak-test.zip](https://github.com/FirebirdSQL/firebird/files/12525308/nbak-test.zip) It looks like reallocated mem. And it might happen the second cache_writer for the same dbb.
It's easily reproducable by attached python script on default build of master (SS).
nbak-test.zip
It looks like reallocated mem. And it might happen the second cache_writer for the same dbb.