Freed-memory write in AtomicXQType

921: ==16746== Invalid read of size 8
921: ==16746== at 0x5C138C4: zorba::SimpleRCObject::removeReference(zorba::RCLock*) (rchandle.h:149)
921: ==16746== by 0x5C344C2: zorba::rchandle<zorba::XQType>::~rchandle() (rchandle.h:201)
921: ==16746== by 0x5C34474: zorba::const_rchandle<zorba::XQType>::~const_rchandle() (rchandle.h:367)
921: ==16746== by 0x5C2B2E4: zorba::const_rchandle<zorba::XQType>::~const_rchandle() (rchandle.h:367)
921: ==16746== by 0x6897D4C: zorba::UserDefinedXQType::~UserDefinedXQType() (typeimpl.h:759)
921: ==16746== by 0x6895FF4: zorba::UserDefinedXQType::~UserDefinedXQType() (typeimpl.h:759)
921: ==16746== by 0x6896017: zorba::UserDefinedXQType::~UserDefinedXQType() (typeimpl.h:759)
921: ==16746== by 0x6895A9A: zorba::XQType::free() (typeimpl.h:338)
921: ==16746== by 0x5C138F0: zorba::SimpleRCObject::removeReference(zorba::RCLock*) (rchandle.h:151)
921: ==16746== by 0x5C344C2: zorba::rchandle<zorba::XQType>::~rchandle() (rchandle.h:201)
921: ==16746== by 0x5C34474: zorba::const_rchandle<zorba::XQType>::~const_rchandle() (rchandle.h:367)
921: ==16746== by 0x5C2B2E4: zorba::const_rchandle<zorba::XQType>::~const_rchandle() (rchandle.h:367)
921: ==16746== by 0x688737F: zorba::RootTypeManager::~RootTypeManager() (in /home/ceej/zo/src/build/src/libzorba_simplestore.so.2.7.0)
921: ==16746== by 0x6880DA7: zorba::RootTypeManager::~RootTypeManager() (root_typemanager.cpp:549)
921: ==16746== by 0x5C5709D: zorba::SimpleRCObject::free() (rchandle.h:141)
921: ==16746== by 0x5C138F0: zorba::SimpleRCObject::removeReference(zorba::RCLock*) (rchandle.h:151)
921: ==16746== by 0x6011FBB: void zorba::RCHelper::removeReference<zorba::RootTypeManager>(zorba::RootTypeManager*) (rchandle.h:420)
921: ==16746== by 0x6011E8E: zorba::GlobalEnvironment::destroy() (globalenv.cpp:139)
921: ==16746== by 0x5C04808: zorba::ZorbaImpl::shutdownInternal(bool) (zorbaimpl.cpp:132)
921: ==16746== by 0x5C046B7: zorba::ZorbaImpl::~ZorbaImpl() (zorbaimpl.cpp:86)
921: ==16746== by 0xA779900: __run_exit_handlers (exit.c:78)
921: ==16746== by 0xA779984: exit (exit.c:100)
921: ==16746== by 0xA75F773: (below main) (libc-start.c:258)
921: ==16746== Address 0xb2d9978 is 8 bytes inside a block of size 40 free'd
921: ==16746== at 0x4C2A366: operator delete(void*) (vg_replace_malloc.c:457)
921: ==16746== by 0x6895D08: zorba::AtomicXQType::~AtomicXQType() (typeimpl.h:451)
921: ==16746== by 0x6886089: zorba::RootTypeManager::~RootTypeManager() (root_typemanager.cpp:626)
921: ==16746== by 0x6880DA7: zorba::RootTypeManager::~RootTypeManager() (root_typemanager.cpp:549)
921: ==16746== by 0x5C5709D: zorba::SimpleRCObject::free() (rchandle.h:141)
921: ==16746== by 0x5C138F0: zorba::SimpleRCObject::removeReference(zorba::RCLock*) (rchandle.h:151)
921: ==16746== by 0x6011FBB: void zorba::RCHelper::removeReference<zorba::RootTypeManager>(zorba::RootTypeManager*) (rchandle.h:420)
921: ==16746== by 0x6011E8E: zorba::GlobalEnvironment::destroy() (globalenv.cpp:139)
921: ==16746== by 0x5C04808: zorba::ZorbaImpl::shutdownInternal(bool) (zorbaimpl.cpp:132)
921: ==16746== by 0x5C046B7: zorba::Z...

Assigning to Markos as he wrote or approved most of the recent changes to root_typemanager.cpp, although I can't be sure that is the location of the problem.