the result is: ###!!! ASSERTION: couldn't get header for some reason: 'NS_SUCCEEDED(rv) && msgHdr', file /home/timeless/mozilla/mailnews/base/src/nsMsgThreadedDBView.cpp, line 391 File: nsMsgThread.cpp Status: Up-to-date Working revision: 1.59 at the end of nsMsgThread::GetFirstUnreadChild (gdb) p numChildren $24 = 8 (gdb) p rv $25 = 0 (gdb) p *result $26 = (nsIMsgDBHdr *) 0x0 (gdb) p *this $27 = {<nsIMsgThread> = {<nsISupports> = {_vptr$ = 0x2acaabc0}, <No data fields>}, mRefCnt = 3, _mOwningThread = 0x80b7380, m_mdbDB = 0x87be300, m_threadKey = 21451, m_numChildren = 8, m_numUnreadChildren = 2, m_flags = 0, m_mdbTable = 0x88ada34, m_metaRow = 0x8acd16c, m_cachedValuesInitialized = 1, m_threadRootKey = 21451} This happens most of the time when i run mozmail or select a folder. Here's the best gdb output i can get [note that (void*)this has changed] Breakpoint 3, nsMsgThread::GetFirstUnreadChild (this=0x8acd580, result=0xbfbf9650) at /home/timeless/mozilla/mailnews/db/msgdb/src/nsMsgThread.cpp:1056 1056 for (PRUint32 childIndex = 0; childIndex < numChildren; childIndex++) 6: this->m_numChildren = 1 5: this->m_numUnreadChildren = 1 1: rv = 3217004156 (gdb) Continuing. Breakpoint 5, nsMsgThread::GetFirstUnreadChild (this=0x8acd580, result=0xbfbf9650) at /home/timeless/mozilla/mailnews/db/msgdb/src/nsMsgThread.cpp:1066 1066 rv = m_mdbDB->IsRead(msgKey, &isRead); 6: this->m_numChildren = 1 5: this->m_numUnreadChildren = 1 2: child = {mRawPtr = 0x8a9a500} 1: rv = 0 (gdb) Continuing. Breakpoint 6, nsMsgKeySet::IsMember (this=0x89a2820, number=21464) at /home/timeless/mozilla/mailnews/base/util/nsMsgKeySet.cpp:669 669 return value; 4: value = 1 (gdb) Continuing. Breakpoint 2, nsMsgThread::GetFirstUnreadChild (this=0x8acd580, result=0xbfbf9650) at /home/timeless/mozilla/mailnews/db/msgdb/src/nsMsgThread.cpp:1076 1076 return rv; 6: this->m_numChildren = 1 5: this->m_numUnreadChildren = 1 1: rv = 0 (gdb) Continuing. ###!!! ASSERTION: couldn't get header for some reason: 'NS_SUCCEEDED(rv) && msgHdr', file /home/timeless/mozilla/mailnews/base/src/nsMsgThreadedDBView.cpp, line 391 ###!!! Break: at file /home/timeless/mozilla/mailnews/base/src/nsMsgThreadedDBView.cpp, line 391

nothing to do with mscott as far as I can tell.

is this still happening with today's trunk build?

the code path still exists. i've been rif'd so i no longer have access to all of those fun freebsd/qnx boxes. my audrey will arive eventually so i will still have an interest in QNX, but I don't have the profile and this fun stuff was on that freebsd box. Why don't we change the code path so that it won't return *result=0 & NS_OK at the same time?

hmm, is it likely this code still exists in this form?

Very likely that it exists in the form. Whether or not it's actually still an issue is another question.