Imported Upstream version 1.0.0~beta.3

[rustc.git] / src / librustc / middle / infer / region_inference / mod.rs

diff --git a/src/librustc/middle/infer/region_inference/mod.rs b/src/librustc/middle/infer/region_inference/mod.rs
index d41fdc5f09acd4a03a8959ef94524f84a8dda44c..c6be97e6dbe0dc46f6db6108d227310e963ef274 100644 (file)
--- a/src/librustc/middle/infer/region_inference/mod.rs
+++ b/src/librustc/middle/infer/region_inference/mod.rs
@@ -246,7 +246,7 @@ impl<'a, 'tcx> RegionVarBindings<'a, 'tcx> {
     }
 
     fn in_snapshot(&self) -> bool {
-        self.undo_log.borrow().len() > 0
+        !self.undo_log.borrow().is_empty()
     }
 
     pub fn start_snapshot(&self) -> RegionSnapshot {