[Bug 28408] New: vbscript gc test crashes occasionally

http://bugs.winehq.org/show_bug.cgi?id=28408

Summary: vbscript gc test crashes occasionally
           Product: Wine
           Version: 1.3.28
          Platform: x86
        OS/Version: Linux
            Status: NEW
          Severity: normal
          Priority: P2
         Component: vbscript
        AssignedTo: [e-mail]
        ReportedBy: [e-mail]

I've seen this once so far with WINEDEBUG=warn+heap:

../../../tools/runtest -q -P wine -M vbscript.dll -T ../../.. -p
vbscript_test.exe.so run.c && touch run.ok
...
Unhandled exception: page fault on read access to 0xfeeeff06 in 32-bit code
(0x40047f24).
Backtrace:
=>0 clean_props+0x49(This=0x12b3b0) [dlls/vbscript/vbdisp.c:150] 
  1 collect_objects+0x71(ctx=0x12f6b8) [dlls/vbscript/vbdisp.c:434] 
  2 destroy_script+0x1c(ctx=0x12f6b8) [dlls/vbscript/vbscript.c:115] 
  3 decrease_state+0xd0(This=0x12b100, state=SCRIPTSTATE_CLOSED)
[dlls/vbscript/vbscript.c:166] 
  4 VBScript_Close+0xab(iface=0x12b100) [dlls/vbscript/vbscript.c:333] 
  5 test_gc+0x2c5() [dlls/vbscript/tests/run.c:959] 
  6 run_tests+0x4f0() [dlls/vbscript/tests/run.c:1102] 
  7 func_run+0x7a() [dlls/vbscript/tests/run.c:1132] 
  8 run_test+0x9e(name="run.c")
[dlls/vbscript/tests/../../../include/wine/test.h:556] 
clean_props+0x49 [dlls/vbscript/vbdisp.c:150] 
150         for(i=0; i < This->desc->prop_cnt; i++)