It used to compile fine until yesterday: ``` link: x86_64-unknown-linux-gnu/rustllvm/librustllvm.so cp: x86_64-unknown-linux-gnu/stage0/lib/rustc/x86_64-unknown-linux-gnu/lib/librustllvm.so compile_and_link: x86_64-unknown-linux-gnu/stage0/lib/rustc/x86_64-unknown-linux-gnu/lib/librustc.so error: internal compiler error: encode_symbol: id not found 321678 make: *** [x86_64-unknown-linux-gnu/stage0/lib/rustc/x86_64-unknown-linux-gnu/lib/librustc.so] Error 101 ```