Comment 4 for bug 1676169

It happens when compiling this project: https://github.com/plietar/librespot

I tried with .cargo purged and such.
Also have tried with full updated dependencies. Always the same problem since the new rustc.

The command that is executed by cargo is:

`rustc --crate-name serde_derive /home/maarten/.cargo/registry/src/github.com-1ecc6299db9ec823/serde_derive-1.0.1/src/lib.rs --crate-type proc-macro --emit=dep-info,link -C prefer-dynamic -C opt-level=3 -C metadata=92c8521f8ef14726 -C extra-filename=-92c8521f8ef14726 --out-dir /home/maarten/Development/librespot/target/release/deps -L dependency=/home/maarten/Development/librespot/target/release/deps --extern serde_derive_internals=/home/maarten/Development/librespot/target/release/deps/libserde_derive_internals-47dabf8e52afea0a.rlib --extern quote=/home/maarten/Development/librespot/target/release/deps/libquote-f9e1361d1ff1643c.rlib --extern syn=/home/maarten/Development/librespot/target/release/deps/libsyn-0d80866437d33434.rlib --cap-lints allow`