Mjsunit/debug-script test fails intermittendly with --vector-stores

test/mjsunit/debug-script.js

 // Copyright 2008 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 10 matching lines @@
 // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
 // Flags: --expose-debug-as debug --expose-gc --send-idle-notification
 // Flags: --allow-natives-syntax --expose-natives-as natives
 // Flags: --noharmony-shipping
+// Flags: --nostress-opt
+
+// --nostress-opt is specified because in stress mode the compilation cache
+// may hold on to old copies of scripts (see bug 1641).
+
 // Note: this test checks that that the number of scripts reported as native
 // by Debug.scripts() is the same as a number of core native scripts.
 // Native scripts that are added by --harmony-shipping are classified
 // as 'experimental', but are still returned by Debug.scripts(), so
 // we disable harmony-shipping for this test
 
 // Get the Debug object exposed from the debug context global object.
 Debug = debug.Debug;
 Debug.setListener(function(){});
 
@@ skipping 58 matching lines @@
 // Test a normal script.
 var debug_script = Debug.findScript(/debug-script.js/);
 assertTrue(/debug-script.js/.test(debug_script.name));
 assertEquals(Debug.ScriptType.Normal, debug_script.type);
 
 // Check a nonexistent script.
 var dummy_script = Debug.findScript('dummy.js');
 assertTrue(typeof dummy_script == 'undefined');
 
 Debug.setListener(null);