Allocation site tests aren't compatible with GcStress mode.

test/mjsunit/allocation-site-info.js

Index: test/mjsunit/allocation-site-info.js
diff --git a/test/mjsunit/allocation-site-info.js b/test/mjsunit/allocation-site-info.js
index 5f6817b6d365f19190d82d6f4169774086eac905..e86deee368231788f3e4a14c4ffa815ab5ed9714 100644
--- a/test/mjsunit/allocation-site-info.js
+++ b/test/mjsunit/allocation-site-info.js
@@ -35,6 +35,11 @@
 // in this test case.  Depending on whether smi-only arrays are actually
 // enabled, this test takes the appropriate code path to check smi-only arrays.
 
+// Reset the GC stress mode to be off. Needed because AllocationMementos only
+// live for one gc, so a gc that happens in certain fragile areas of the test
+// can break assumptions.
+%SetFlags("--gc-interval=-1")

[Hannes Payer (out of office), 2013/09/19 12:53:36]

Can you try to set the flag in the header of the test?

[mvstanton, 2013/09/19 13:10:35]

sadly no due to ordering.

+
 // support_smi_only_arrays = %HasFastSmiElements(new Array(1,2,3,4,5,6,7,8));
 support_smi_only_arrays = true;