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List:       kde-devel
Subject:    Re: QStringList problem
From:       Thiago Macieira <thiago () kde ! org>
Date:       2006-11-17 22:21:47
Message-ID: 200611172321.48327.thiago () kde ! org
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Christian Schaarschmidt wrote:
>Hi,
>
>I have a little problem with QStringList from qt-copy.
>Has anybody seen such behaviour before and can give me some advice or
>workaround?

Try valgrind. You have dangling pointers.

All iterators are invalidated when you change the container.

>########### small example ################
>  QStringList l;
>  l << "item";
>  QStringList::Iterator iter = l.begin();
>  kDebug(0)<<"iter before insert="<<*iter<<endl;
>  l.insert( iter, "ins" );

"iter" is invalidated at this point. You have to start again from 
l.begin();

>  kDebug(0)<<"iter after insert="<<*iter<<endl;
>  ++iter;
>  if ( iter == l.end() ) {
>    kDebug(0) << "iter at the end"<<endl;
>  } else {
>    kDebug(0) << "iter not at the end" <<endl;
>    kDebug(0) << *iter << endl;
>  }
>############################

-- 
  Thiago Macieira  -  thiago (AT) macieira.info - thiago (AT) kde.org
    PGP/GPG: 0x6EF45358; fingerprint:
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