Improve instrumentation for the bug reported during `fn report_borrow…

…ed_value_does_not_live_long_enough`.
rust-lang · May 3, 2018 · 1c3fd02 · 1c3fd02
1 parent f67c683
commit 1c3fd02
Showing 1 changed file with 2 additions and 1 deletion.
diff --git a/src/librustc_mir/borrow_check/error_reporting.rs b/src/librustc_mir/borrow_check/error_reporting.rs
@@ -471,7 +471,8 @@ impl<'cx, 'gcx, 'tcx> MirBorrowckCtxt<'cx, 'gcx, 'tcx> {
             | (RegionKind::ReClosureBound(_), _)
             | (RegionKind::ReCanonical(_), _)
             | (RegionKind::ReErased, _) => {
-                span_bug!(drop_span, "region does not make sense in this context");
+                span_bug!(drop_span, "region {:?} does not make sense in this context",
+                          borrow.region);
             }
         }
     }