Found the reason for this bug. On July 8th a package called librust-winapi-dev was accepted in sid
It comes with a complete common-sense breaking "Provides:" line of more than 57kB length, as it provides 1336 packages. IMHO this is insane. However, cdebootstrap uses libdebian-installer-0.116 to parse the package list and in libdebian-installer-0.116/src/parser_rfc822.c I found: #define READSIZE 16384 and I guess increasing this to 65536 will fix the problem until someone else encouraged by what the debian rust team did will use even longer lines :/ As the parser_rfc822.c is from the same author as cdebootstrap, I won't open a separated bug on that. Please fix as soon as possible. Thanks a bunch.
