1432514 - Can't compile bindings.rs for the style crate due to an empty extern declaration

Status: RESOLVED WORKSFORME

(Core :: CSS Parsing and Computation, defect)

Description

[Henri Sivonen (:hsivonen) (away from Bugzilla until 2026-04-13)]

Steps to reproduce:
 1) On Ubuntu 16.04, run ./mach bootstrap to have the latest clang and rustc.
 2) ./mach build

Actual results:
 3:18.64    Compiling style v0.0.1 (file:///opt/Projects/gecko/servo/components/style)
 3:22.80    Compiling webrender_bindings v0.1.0 (file:///opt/Projects/gecko/gfx/webrender_bindings)
 4:02.31 error: expected one of `crate`, `fn`, `pub`, `static`, `type`, or `}`, found `;`
 4:02.31    --> /opt/Projects/gecko/obj-x86_64-pc-linux-gnu/toolkit/library/x86_64-unknown-linux-gnu/debug/build/style-b3a45225c6162ac0/out/gecko/bindings.rs:588:5
 4:02.31     |
 4:02.31 587 | extern "C" {
 4:02.31     |             - expected one of `crate`, `fn`, `pub`, `static`, `type`, or `}` here
 4:02.31 588 |     ;
 4:02.31     |     ^ unexpected token
 4:02.31 
 4:02.65 error: Could not compile `style`.
 
The generated source has this:
extern "C" {
    ;
}

Comment 1

[Henri Sivonen (:hsivonen) (away from Bugzilla until 2026-04-13)]

Might be old rustfmt. I'll check.

Comment 2

[Henri Sivonen (:hsivonen) (away from Bugzilla until 2026-04-13)]

Fixed by upgrading rustfmt.