> This is a diff of a .symbols file I generated from libvtkgdcm2.8 > versions 2.8.7-1 and 2.8.7-2.
Thanks Mattia for tracking this issue ! As you've noticed the ABI breakage occur in between two minor uploads -1 and -2. So I suspect this may confuse reader that bug be reported against src:gdcm, since obviously not a single line change could have occurred in between two minor uploads. Trying to read the changelog of 2.8.7-2 I only find reference to py3 changes, however digging a bit in the d/control Deps I can see a switch from vtk6 to vtk7: https://salsa.debian.org/med-team/gdcm/commit/616785342cdfc6747125a3f505af0b985d4d8fee Since libvtkgdcm2.8 is a c++ project, I suspect that any change of any inherited c++ class will change the ABI. I would suggest that libvtkgdcm2.8 be removed, and a new binary package libvtk7gdcm2.8 be uploaded instead.