sagetex 3.4+ds-2 is marked for autoremoval from testing on 2020-06-16
It (build-)depends on packages with these RC bugs:
959623: ppl: FTBFS: swi_cfli.hh:351:35: error: cannot convert â??int*â?? to â??size_t*â?? {aka â??long unsigned int*â??}
960131: swi-prolog: flaky autopkgtest: test set "file" ... aborted