Fix debug assertion

src/librustc_mir/interpret/terminator.rs

@@ -265,6 +265,7 @@ impl<'mir, 'tcx, M: Machine<'mir, 'tcx>> InterpCx<'mir, 'tcx, M> {
         match instance.def {
             ty::InstanceDef::Intrinsic(..) => {
                 let old_stack = self.cur_frame();
+                let old_bb = self.frame().block;
                 M::call_intrinsic(self, span, instance, args, dest, ret, unwind)?;
                 // No stack frame gets pushed, the main loop will just act as if the
                 // call completed.
@@ -275,7 +276,7 @@ impl<'mir, 'tcx, M: Machine<'mir, 'tcx>> InterpCx<'mir, 'tcx, M> {
                     // then the intrinsic implementation should have
                     // changed the stack frame (otherwise, we'll end
                     // up trying to execute this intrinsic call again)
-                    assert!(self.cur_frame() != old_stack);
+                    debug_assert!(self.cur_frame() != old_stack || self.frame().block != old_bb);
                 }
                 if let Some(dest) = dest {
                     self.dump_place(*dest)