`make check -j8` fails because it can't find the regex crate

[nrc]

make check works just fine though.

[nrc]

Er, to be precise we fail in one of the compile-fail regex tests.

[lifthrasiir]

We need a metabug for missing make dependencies. Oh, that's #8058.

[alexcrichton]

Was the missing crate specifically the regex crate or was it the regex_macros crate?

This is likely because the compile-fail tests do not depend on HOST_CRATES, which notable includes regex_macros. Fixing this would likely involve adding a compile-fail-fulldeps folder.

[nrc]

ah yes, regex_macros - sorry, it was late

[kmcallister]

I ran into this on today's master.