Developer Douglas DeMaio is informing the OpenSuSE community that Tumbleweed snapshot 20171017 removed GNU Compiler Collection 6 from the repositories, which means that you won’t be able to use them to compile applications from sources. Instead, you can now use the latest GCC 7, which is the default compiler. The same snapshot also patched the operating system against the WPA2 KRACK (Key Reinstallation Attack) security vulnerability that puts virtually any device that connects to the Internet and uses the WPA2 security protocol at risk. Therefore, openSUSE Tumbleweed users are urged to update their systems immediately.