Details
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Bug
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Resolution: Done
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P4: Low
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5.1.1
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None
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Win32, VS2012
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qtactiveqt: 0d29579baffd4f31a3ec39590117f4fee821694d (5.2.1, stable, 9.12.2013) Qt: 4: 3bef845f4623e0edcd52ddcffee3612f4f7f6779 (20.12.2013, 4.8.6)
Description
calling IEnumConnections->Skip does't skip element of the collection. It doesn't return a proper error code that indicates a successful completion.
It look like it manipulates with uninitialized data and produces undefined number of successful completions until finally retiring error code that indicates a successful completion.
void undefinedBehavior1( IQTCrashPtr qtObject )
{
IConnectionPointPtr connectionPoint;
IConnectionPointContainerPtr( qtObject )->FindConnectionPoint( __uuidof( IQTCrashEvents ), &connectionPoint );
IEnumConnectionsPtr connections;
connectionPoint->EnumConnections( &connections );
int cnt = 0;
while( connections->Skip( 1 ) == S_OK)
{
cnt++;
}
std::wcout << cnt << std::endl; // cnt is a random number
}
Example project that demonstrates the crash is attached
Attachments
Issue Links
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- Closed
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