bug-compatible adj. [common] Said of a design or revision that has been badly compromised by a requirement to be compatible with {fossil}s or {misfeature}s in other programs or (esp.) previous releases of itself. "MS-DOS 2.0 used \ as a path separator to be bug-compatible with some cretin's choice of / as an option character in 1.0."
bug-compatible Said of a design or revision that has been badly compromised by a requirement to be compatible with {fossils} or {misfeatures} in other programs or (especially) previous releases of itself. "{MS-DOS} 2.0 used \ as a path separator to be bug-compatible with some cretin's choice of / as an option character in 1.0." [{Jargon File}]