[Qt-interest] segmentation fault with QtSql mysql driver

[Bill KING]

I can't connect to the ftp server, so I can't tell, if it's dated after
2nd of january, then it should contain the necessary changes, otherwise,
maybe a snapshot.

pepone.onrez wrote:
> What Qt-4.5 should i use i view 2 in yours ftp
>
> qt-all-opensource-src-4.5.0-beta1.zip
> qt-all-opensource-src-4.5.0-tp1.tar.bz2
>
> José Manuel, Gutíerrez de la Concha
>
> On Thu, Jan 22, 2009 at 1:13 AM, Bill KING <bill.king at trolltech.com> wrote:
>   
>> There's been some cleanup for 4.5, can you test the pre-release code and
>> see if it fixes it? (It should).
>>
>> The real problem is that mysql doesn't check null pointers before
>> dereferencing them. At all. Even when it's the one that freed them in
>> the first place.
>>
>> So, yes, I'd love for someone to report this to mysql :) More voices the
>> merrier. But, that said, the Qt could should be more robust now too.
>>
>> pepone.onrez wrote:
>>     
>>> Hi there
>>>
>>> I using Qt-4.4.2 mysql drivers in a program to make a simple query,
>>> the program runs fine but if i stop the mysql server while a query is
>>> running the program crash, as show it the next stack trace the crash
>>> occurs when QSqlQuery goes out of scope. Should i report a bug to Qt
>>> Mysql or both for this issue?
>>>
>>> My enviroment is:
>>> Qt-4.4.2
>>> mysql-5.1.30,
>>> gcc-4.1.2
>>> linux centos 5.2
>>>
>>>
>>> #0  0x00c535f8 in mysql_next_result () from
>>> /usr/local/lib/mysql/libmysqlclient_r.so.16
>>> #1  0x0041aaa0 in QMYSQLResult::cleanup (this=0x8199bd0) at
>>> drivers/mysql/qsql_mysql.cpp:412
>>> #2  0x0041b074 in ~QMYSQLResult (this=0x8199bd0) at
>>> drivers/mysql/qsql_mysql.cpp:391
>>> #3  0x003ffa0b in ~QSqlQueryPrivate (this=0x818f810) at kernel/qsqlquery.cpp:97
>>> #4  0x003ffa7d in ~QSqlQuery (this=0xb57c67c8) at kernel/qsqlquery.cpp:248
>>> #5  0x0809d11d in PermissionsVerifierI::checkPermissions
>>> (this=0x81774a0, user=@0xb57c6be8, passwd=@0xb57c6be4,
>>> reason=@0xb57c6b28, current=@0xb57c6900) at
>>> PermissionsVerifierI.cpp:178
>>> #6  0x00146be5 in Glacier2::PermissionsVerifier::__write () from
>>> /usr/lib/libGlacier2.so.33
>>> #7  0x005ac228 in Ice::Object::__collocDispatch () from /usr/lib/libIce.so.33
>>> #8  0x00148a21 in
>>> IceDelegateD::Glacier2::PermissionsVerifier::checkPermissions () from
>>> /usr/lib/libGlacier2.so.33
>>> #9  0x001477cb in
>>> IceProxy::Glacier2::PermissionsVerifier::checkPermissions () from
>>> /usr/lib/libGlacier2.so.33
>>> #10 0x08099c68 in
>>> IceProxy::Glacier2::PermissionsVerifier::checkPermissions
>>> (this=0x8189818, userId=@0xb57c6be8, password=@0xb57c6be4,
>>> reason=@0xb57c6b28) at /usr/include/Glacier2/PermissionsVerifier.h:155
>>> #11 0x080970c1 in PollingChatSessionFactoryI::create (this=0x8177478,
>>> name=@0xb57c6be8, password=@0xb57c6be4, c=@0xb57c6d54) at
>>> PollingChatSessionFactoryI.cpp:80
>>> #12 0x080722d6 in PollingChat::PollingChatSessionFactory::___create
>>> (this=0x8177478, __inS=@0xb57c6d54, __current=@0xb57c6d54) at
>>> PollingChat.cpp:2363
>>> #13 0x08072544 in PollingChat::PollingChatSessionFactory::__dispatch
>>> (this=0x8177478, in=@0xb57c6d54, current=@0xb57c6d54) at
>>> PollingChat.cpp:2396
>>> #14 0x0053fdab in IceInternal::Incoming::invoke () from /usr/lib/libIce.so.33
>>> #15 0x00509f7c in Ice::ConnectionI::invokeAll () from /usr/lib/libIce.so.33
>>> #16 0x00510f2e in Ice::ConnectionI::message () from /usr/lib/libIce.so.33
>>> #17 0x0063a544 in IceInternal::ThreadPool::run () from /usr/lib/libIce.so.33
>>> #18 0x0063af5f in IceInternal::ThreadPool::EventHandlerThread::run ()
>>> from /usr/lib/libIce.so.33
>>> #19 0x001c10ae in IceUtil::Thread::~Thread$base () from
>>> /usr/lib/libIceUtil.so.33
>>> #20 0x001d645b in start_thread () from /lib/libpthread.so.0
>>> #21 0x002b8e5e in clone () from /lib/libc.so.6
>>> (gdb)
>>>
>>> (gdb) frame 5
>>> #5  0x0809d11d in PermissionsVerifierI::checkPermissions
>>> (this=0x81774a0, user=@0xb57c6be8, passwd=@0xb57c6be4,
>>> reason=@0xb57c6b28, current=@0xb57c6900) at
>>> PermissionsVerifierI.cpp:178
>>> 178         return false;
>>> (gdb) info locals
>>> sync = {_mutex = @0x81774ac, _acquired = true}
>>> db = {static defaultConnection = 0x42e015 "qt_sql_default_connection",
>>> d = 0x817fea8}
>>> query = {d = 0x818f810}
>>> hash = {static npos = 4294967295, _M_dataplus =
>>> {<std::allocator<char>> = {<__gnu_cxx::new_allocator<char>> = {<No
>>> data fields>}, <No data fields>}, _M_p = 0x819bedc
>>> "8aa7c24ec4e256ce9b4bc11f7880f695"}}
>>> queryString = <incomplete type>
>>>
>>>
>>> Regards,
>>>
>>> José Manuel, Gutíerrez de la Concha
>>>
>>> _______________________________________________
>>> Qt-interest mailing list
>>> Qt-interest at trolltech.com
>>> http://lists.trolltech.com/mailman/listinfo/qt-interest
>>>
>>>       
>> --
>> Bill King, Software Engineer
>> Qt Software, Nokia Pty Ltd
>> Brisbane Office
>>
>>
>>     
>
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>   


-- 
Bill King, Software Engineer
Qt Software, Nokia Pty Ltd
Brisbane Office