I follow the document Android_User's_Guide.pdf to get and buid 4.4.2. I failed at command "~/bin/repo sync", it just output the error message "
error: prebuilts/gcc/linux-x86/host/x86_64-linux-glibc2.7-4.6/: platform/prebuilts/gcc/linux-x86/host/x86_64-linux-glibc2.7-4.6 checkout b89fda71fcd0fa0cf969310e75be3ea33e048b44".
I don't understand what's wrong, what exact the error is. My PC is Ubuntu 14.04 AMD 64.