[Bug 38521] SourceNaviator crashes on exit

[WineHQ Bugzilla]

https://bugs.winehq.org/show_bug.cgi?id=38521

Damjan Jovanovic  changed:

What    |Removed                     |Added
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--- Comment #7 from Damjan Jovanovic  ---
The only call to DeleteCriticalSection in the app's source is in file
tcl/win/tclWinNotify.c:

void
Tcl_FinalizeNotifier(clientData)
    ClientData clientData;      /* Pointer to notifier data. */
{
    ThreadSpecificData *tsdPtr = (ThreadSpecificData *) clientData;

DeleteCriticalSection(&tsdPtr->crit);
    CloseHandle(tsdPtr->event);

The backtrace contained:
Unhandled exception: page fault on read access to 0x00000000 in 32-bit code
(0x7bc35a61).

which probably means NULL was passed to DeleteCriticalSection(), ie.
ThreadSpecificData.crit is NULL. But why is it NULL?