Bug#1101259: closed by Debian FTP Masters <ftpmaster at ftp-master.debian.org> (reply to Bastian Germann <bage at debian.org>) (Bug#1101259: fixed in twinkle 1:1.10.2+dfsg-3)

[Frédéric Brière]

Note that this "fix" doesn't actually change anything, as it results in
gcc being invoked with `-std=c++17 -std=c++11`, and the latter option
prevails.  Building with libxml2-dev 2.12.7+dfsg+really2.9.14-0.3 still
fails.

The reason why the salsa build succeeded nonetheless is thanks to
2.12.7+dfsg+really2.9.14-0.4 having just been released today and no
longer pulling in ICU (#1092484), thus solving the issue.