Package: crystal Version: 1.6.0+dfsg-2 Package fails to build in an isolated environment ( https://tests.reproducible-builds.org/debian/rb-pkg/unstable/amd64/crystal.html )
One of the tests ( https://salsa.debian.org/deiv/crystal/-/blob/master/spec/std/socket/tcp_server_spec.cr#L89) tries to establish a connection to a non-existent server which works differently in isolation and locally. -- Regards, Andrey