Control: fixed 941707 0.99998-2 The reproducer I gave here, which still seems reliable for me on Buster, doesn't reproduce the problem for me on Bullseye with 0.99998-2, despite nothing in the change log at https://metadata.ftp-master.debian.org/changelogs//main/r/ruby-odbc/ruby-odbc_0.99998-2_changelog appearing relevant. The Bullseye version won't install on Buster, with a dependency on Bullseye's version of Ruby and won't easily build on Buster, with a debhelper-compat change and:
dwz: debian/ruby-odbc/usr/lib/x86_64-linux-gnu/ruby/vendor_ruby/2.5.0/odbc.so: DWARF version 0 unhandled ... which perhaps is avoided on Bullseye by its newer binutils, per eg https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=967005#39. Using ruby-odbc under Bullseye's Ruby has its own problem - warnings of the deprecation of tainting - but that deserves its own bug report.
