fix

Author: Zoxc

src/librustc/ty/maps/job.rs

@@ -61,6 +61,7 @@ pub struct QueryJob<'tcx> {
     /// Diagnostic messages which are emitted while the query executes
     pub diagnostics: Lock<Vec<Diagnostic>>,
 
+    #[cfg(parallel_queries)]
     latch: QueryLatch,
 }
 
@@ -71,6 +72,7 @@ impl<'tcx> QueryJob<'tcx> {
             diagnostics: Lock::new(Vec::new()),
             info,
             parent,
+            #[cfg(parallel_queries)]
             latch: QueryLatch::new(),
         }
     }

src/librustc/ty/maps/mod.rs

@@ -66,7 +66,9 @@ use self::plumbing::*;
 pub use self::plumbing::{force_from_dep_node, CycleError};
 
 mod job;
-pub use self::job::{QueryJob, QueryInfo, handle_deadlock};
+pub use self::job::{QueryJob, QueryInfo};
+#[cfg(parallel_queries)]
+pub use self::job::handle_deadlock;
 
 mod keys;
 pub use self::keys::Key;