[Qt-interest] segmentation fault with QtSql mysql driver

[pepone.onrez]

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
>>
>> _______________________________________________
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>> Qt-interest at trolltech.com
>> http://lists.trolltech.com/mailman/listinfo/qt-interest
>>
>
>
> --
> Bill King, Software Engineer
> Qt Software, Nokia Pty Ltd
> Brisbane Office
>
>