Unable to build example-0

[anon8675309]

I attempted to build example-0 and got an error from some code in syntex_syntax. I'm not sure what this is, but I don't see it in the Cargo.toml file for this project, finch, nor falcon.

I wouldn't expect code that doesn't even compile to be able to make it into a release of a package (specifically: one of example-0's dependencies), but I don't have any other explanation...

I'm not really sure where to go from here on this one.

vagrant@debian9:~/finch-examples/example-0/example$ cargo build
   Compiling syntex_syntax v0.58.1
   Compiling syn v0.14.9
error[E0423]: expected function, tuple struct or tuple variant, found struct `ast::Name`
   --> /home/vagrant/.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

   Compiling syn v0.15.3
error: aborting due to previous error

For more information about this error, try `rustc --explain E0423`.
error: could not compile `syntex_syntax`.
warning: build failed, waiting for other jobs to finish...
error: build failed