QLocalSocket issue/difference between *nix & win32

[vallidor]

i might suppose this is why: http://msdn.microsoft.com/en-us/libr...(v=vs.85).aspx

before you declare your local socket, could you try calling "QHostInfo testHost = QHostInfo::fromName("google.com");" and see if it still crashes?

[stampede]

before you declare your local socket, could you try calling "QHostInfo testHost = QHostInfo::fromName("google.com");" and see if it still crashes?

#include <QLocalSocket>
#include <QHostInfo>
 
int main(int argc, char *argv[]){
    QHostInfo testHost = QHostInfo::fromName("google.com");
    QLocalSocket s;
    return 0;
}

#include <QLocalSocket>
#include <QHostInfo>
 
int main(int argc, char *argv[]){
    QHostInfo testHost = QHostInfo::fromName("google.com");
    QLocalSocket s;
    return 0;
}

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In debug the same assertion fails, crash in release:

Program received signal SIGSEGV, Segmentation fault.
0x6a30dea6 in ZNK7QObject6d_funcEv () from C:\Qt\bin\QtCore4.dll
(gdb) bt
#0 0x6a30dea6 in ZNK7QObject6d_funcEv () from C:\Qt\bin\QtCore4.dll
#1 0x6a2a52bd in ZNK7QObject6threadEv () from C:\Qt\bin\QtCore4.dll
#2 0x6a2b50b4 in ZN21QEventDispatcherWin3221registerEventNotifierEP 17QWinEventN
otifier () from C:\Qt\bin\QtCore4.dll
#3 0x6a2b8d47 in ZN17QWinEventNotifierC2EPvP7QObject ()
from C:\Qt\bin\QtCore4.dll
#4 0x6ff76738 in ZN12QLocalServer21nextPendingConnectionEv ()
from C:\Qt\bin\QtNetwork4.dll
#5 0x6ff7366f in ZN12QLocalSocketC2EP7QObject ()
from C:\Qt\bin\QtNetwork4.dll
#6 0x00401415 in ?? ()
#7 0x00401f9d in ?? ()
#8 0x00401c56 in ?? ()
#9 0x004010db in ?? ()
#10 0x00401158 in ?? ()
#11 0x77621174 in KERNEL32!AcquireSRWLockExclusive ()
from C:\Windows\system32\kernel32.dll
#12 0x77b3b3f5 in ntdll!RtlInsertElementGenericTableAvl ()
from C:\Windows\system32\ntdll.dll
#13 0x77b3b3c8 in ntdll!RtlInsertElementGenericTableAvl ()
from C:\Windows\system32\ntdll.dll
#14 0x00000000 in ?? ()

But this time a warning message appears before crash and failed assertion:

warning: QObject::connect: Cannot connect (null)::destroyed() to QHostInfoLookupManager::waitForThreadPoolDone()

[vallidor]

i see, and the backtrace doesn't even reference anything resembling winsock, it seems to stay within qtcore/qtnetwork. it certainly seems like a bug.

[Telecaster]

Hello all,

I'm building a static lib that uses QLocalSocket and when I link with a basic MSVC++ 9.0 win32 app, i'm facing the exact same issue as you (crash (in release) or Assert (in debug) telling me "Cannot Create a Win event notifier without a QEventDispatcherWin32".

Did you find any fix or workaround ?

Thanks for your help

Marc