Bug#971946: libdebian-installer: READSIZE size insufficient for cdebootstrap to build sid/unstable from buster/stable environment

[Jonathan Stanley <jonrstanley@gmail.com>]

Package: libdebian-installer
Version: 0.119

When using cdebootstrap from within buster/stable to create a rootfs for sid/unstable, it will fail with:

W: parser_rfc822: Iek! Don't find end of value!

E: Internal error: download

Seems "64k ought to be enough for everyone" strikes again as this is functionally a dupe of Bug#554444 though it is now that a READSIZE of 65536 in libdebian-installer/src/parser_rfc822.c is now insufficient. I downloaded the deb-src, updated READSIZE to 262144, debuild'ed it and installed it, cdebootstrap would then complete successfully for sid/unstable. My diff is:

diff --git a/src/parser_rfc822.c b/src/parser_rfc822.c

index afd336a..b14859e 100644

--- a/src/parser_rfc822.c

+++ b/src/parser_rfc822.c

@@ -35,7 +35,7 @@

 #include <sys/types.h>

 #include <unistd.h>

-#define READSIZE 65536

+#define READSIZE 262144

 int di_parser_rfc822_read (char *begin, size_t size, di_parser_info *info, di_parser_read_entry_new entry_new, di_parser_read_entry_finish entry_finish, void *user_data)

 {