compile fails with syntax syntec errors

[drahnr]

Compiling workspace github.com/spearow/juice always fails (redis -u ... flushall, delete target dir, delete ~/.cache/sccache* did not change anything)

error[E0423]: expected function, tuple struct or tuple variant, found struct `ast::Name`
   --> /home/bernhard/.cargo/registry/src/github.com-1ecc6299db9ec823/syntex_syntax-0.58.1/src/symbol.rs:146:27
    |
146 |                       name: ast::Name($index),
    |                             ^^^^^^^^^
...
165 | / declare_keywords! {
166 | |     // Invalid identifier
167 | |     (0,  Invalid,        "")
168 | |
...   |
231 | |     (56, CrateRoot, "{{root}}")
232 | | }
    | |_- in this macro invocation

error: aborting due to previous error

For more information about this error, try `rustc --explain E0423`.

where the versions are:

$ rustc --version
rustc 1.41.0 (5e1a79984 2020-01-27)
$ cargo --version
cargo 1.41.0 (626f0f40e 2019-12-03)
$ sccache --version
sccache 0.2.13-alpha.0

with env

RUSTC_WRAPPER=$(which sccache)
SCCACHE_REDIS=redis://...6739

[froydnj]

I cannot reproduce this error with a local disk cache; does it reproduce if you use a local disk cache instead of redis?

[drahnr]

Just tried, happens also:

killall sccache
rm -rf ~/.cargo/registry/{cache,src}
rm -rf ~/.cache/sccache*
rm -rf target/debug
unset SCCACHE_REDIS
# RUSTC_WRAPPER as before
cargo b

fails too.

Edit:

Just tried to verify that the all local build works, but that is not the case as it seems either.
it worked before setting up sccache which makes no sense at all.

[froydnj]

Ah, I can reproduce this with a local disk cache if I update to Rust 1.41. @chmanchester, are you able to take a look at this?

[chmanchester]

Yes, I'll take a look at this later in the day.

[chmanchester]

I'm having trouble getting that crate to build with rustc 1.41 at all. Running the rustc command generated by cargo for syntex_syntax fails in just the same way.

Closing for now, please let me know if I've missed something here that indicates this can be fixed in sccache.

[drahnr]

I think this might be it rust-lang/rust#68729
It's just coincidence that I deleted the cached binary from before the update (does that make sense?)

[drahnr]

Cause by a outdated peer dependency on bindgen 0.30 - sorry for the noise