For me currently x b --stage 1 library/std works fine, while x c --stage 1 library/std with a lot of errors related to core not being found.

error: could not compile ppv-lite86 due to 750 previous errors
error: could not compile test due to 60 previous errors
error: could not compile proc_macro due to 2 previous errors

This is the commit that I'm trying to check: c68cd2f

I had the same problem previously too, but it usually solves magically after rebase / x clean / etc. However the usual "reboot router" kind of solutions doesn't seem to help this time :')

Full output: log.txt