Fix recursion depth counting in `layout`

diff --git a/src/librustc/ty/util.rs b/src/librustc/ty/util.rs
index be1582066e393c4b99b6884e6b8f9a5c9dbe85ab..a81c3a177f8854070966720631c65aac9e59c62e 100644 (file)
--- a/src/librustc/ty/util.rs
+++ b/src/librustc/ty/util.rs
@@ -654,11 +654,12 @@ pub fn layout<'lcx>(&'tcx self, infcx: &InferCtxt<'a, 'tcx, 'lcx>)
         }
 
         tcx.layout_depth.set(depth+1);
-        let layout = Layout::compute_uncached(self, infcx)?;
+        let layout = Layout::compute_uncached(self, infcx);
+        tcx.layout_depth.set(depth);
+        let layout = layout?;
         if can_cache {
             tcx.layout_cache.borrow_mut().insert(self, layout);
         }
-        tcx.layout_depth.set(depth);
         Ok(layout)
     }