Source: pbcopper Version: 1.6.0+dfsg-1 Severity: serious Tags: ftbfs https://buildd.debian.org/status/package.php?p=pbcopper&suite=sid
... ../include/pbcopper/pbmer/DnaBit.h:16:26: error: expected type-specifier before ‘__int128’ 16 | __extension__ using BI = __int128; | ^~~~~~~~ ... int128 is not available on 32bit systems, I don't know whether upstream cares about that.