[debugger] do not accidentally pop contexts in bytecode

test/debugger/regress/regress-5610.js

Index: test/debugger/regress/regress-5610.js
diff --git a/test/mjsunit/harmony/async-debug-step-next-constant.js b/test/debugger/regress/regress-5610.js
similarity index 71%
copy from test/mjsunit/harmony/async-debug-step-next-constant.js
copy to test/debugger/regress/regress-5610.js
index cea86d7a2fecbeda87358486cf377d3944742cfa..4c45aef82d9fb8d0fd12fc87a37f92de116f6009 100644
--- a/test/mjsunit/harmony/async-debug-step-next-constant.js
+++ b/test/debugger/regress/regress-5610.js
@@ -2,7 +2,7 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-// Flags: --expose-debug-as debug --allow-natives-syntax --harmony-async-await
+// Flags: --harmony-async-await --turbo
 
 var Debug = debug.Debug;
 var step_count = 0;
@@ -26,14 +26,8 @@ Debug.setListener(listener);
 async function f() {
   var a = 1;
   debugger;          // B0 StepNext
-  a +=               // B1 StepNext
-       await         // B3 StepNext
-             5;      // B2 StepNext
-  return a;          // B4 StepNext
-}                    // B5 Continue
+  print(1);          // B1 StepNext
+  return a;          // B2 StepNext
+}                    // B3 Continue
 
 f();
-
-%RunMicrotasks();
-
-assertEquals(6, step_count);