[inspector] gracefully handle stack overflows in the inspector.

test/debugger/debugger.status

 # Copyright 2016 the V8 project authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 [
 [ALWAYS, {
   # Issue 3660: Replacing activated TurboFan frames by unoptimized code does
   # not work, but we expect it to not crash.
   'debug/debug-step-turbofan': [PASS, FAIL],
+
+  # Too slow in debug mode with --stress-opt mode.
+  'regress/regress-2318': [PASS, ['mode == debug', SKIP]],
 }],  # ALWAYS
 
 ##############################################################################
 ['gc_stress == True', {
   # Skip tests not suitable for GC stress.
   # Tests taking too long
   'debug/debug-stepout-scope-part1': [SKIP],
   'debug/debug-stepout-scope-part2': [SKIP],
   'debug/debug-stepout-scope-part3': [SKIP],
   'debug/debug-stepout-scope-part4': [SKIP],
@@ skipping 25 matching lines @@
 
 ##############################################################################
 ['arch == s390 or arch == s390x', {
 
   # Stack manipulations in LiveEdit is not implemented for this arch.
   'debug/debug-liveedit-check-stack': [SKIP],
   'debug/debug-liveedit-stack-padding': [SKIP],
   'debug/debug-liveedit-restart-frame': [SKIP],
 }],  # 'arch == s390 or arch == s390x'
 ]