Rollup merge of rust-lang#67145 - RalfJung:miri-step, r=oli-obk

fix miri step debug printing r? @oli-obk
tmandry · Dec 9, 2019 · 5ce5464 · 5ce5464
2 parents 6b6b6f3 + 2468b23
commit 5ce5464
Showing 1 changed file with 3 additions and 1 deletion.
diff --git a/src/librustc_mir/interpret/step.rs b/src/librustc_mir/interpret/step.rs
@@ -304,7 +304,9 @@ impl<'mir, 'tcx, M: Machine<'mir, 'tcx>> InterpCx<'mir, 'tcx, M> {
         if !self.stack.is_empty() {
             // This should change *something*
             debug_assert!(self.cur_frame() != old_stack || self.frame().block != old_bb);
-            info!("// {:?}", self.frame().block);
+            if let Some(block) = self.frame().block {
+                info!("// executing {:?}", block);
+            }
         }
         Ok(())
     }