Temporarily skip debugger/debug/es8/async-function-debug-scopes test.

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, {
   # All tests in the bug directory are expected to fail.
   'bugs/*': [FAIL],
 
   # 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],
 
   # Issue 5587: The eval'ed code is piped through Ignition and fails when being
   # live edited. This needs investigation.
   'debug/debug-liveedit-double-call': [SKIP],
 
   # Issue 3641: The new 'then' semantics suppress some exceptions.
   # These tests may be changed or removed when 'chain' is deprecated.
   'debug/es6/debug-promises/reject-with-throw-in-reject': [FAIL],
   'debug/es6/debug-promises/reject-with-undefined-reject': [FAIL],
   'debug/es6/debug-promises/reject-with-invalid-reject': [FAIL],
 
   # Issue 5651: Context mismatch in ScopeIterator::Type() for eval default
   # parameter value
   'debug/es6/debug-scope-default-param-with-eval': [FAIL],
 
+  # Issue 5837: Investigate flakiness.
+  'debug/es8/async-function-debug-scopes': [SKIP],
+
   # Slow test
   'debug/debug-scopes': [PASS, SLOW],
 
   # Too slow in debug mode and on slow platforms.
   'regress/regress-2318': [PASS, ['mode == debug or (arch != ia32 and arch != x64) or asan == True or msan == True', SKIP]],
 }],  # ALWAYS
 
 ##############################################################################
 ['variant == stress', {
   # TODO(jarin/mstarzinger): Functions with eval or debugger now get optimized
@@ skipping 63 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-double-call': [SKIP],
   'debug/debug-liveedit-stack-padding': [SKIP],
   'debug/debug-liveedit-restart-frame': [SKIP],
 }],  # 'arch == s390 or arch == s390x'
 ]