More unknown types in `webrender` after #12993

[lnicola]

I don't know how this happened, but we're reporting more unknown types in the bitflags! expansions.

webrender is https://github.com/rust-lang/rustc-perf.git at c52ee623e231e7690a93be88d943016968c1036b.

EDIT:

Looks like manually expanding that macro makes the errors go away. Repro, note that the second item is needed:

# bitflags = "1.0"

use bitflags::bitflags;

bitflags! {
    #[repr(C)]
    pub struct FontInstanceFlags: u32 {
        const SYNTHETIC_ITALICS = 1 << 0;
        const SYNTHETIC_BOLD    = 1 << 1;
    }
}

Are we choking on $crate?

[lnicola]

CC @lowr

[lowr]

cc #12993

For future reference, we were failing to resolve the try!() macro used without escaping in Rust 2015 crates.

[lnicola]

Makes more sense than crate. Somehow I missed those in the expansion 😕.