todays bug report no 1

[Christian Couder]

Hi Roland and Falk,

Roland Krause wrote:
> 
> Today I am trying something new.
> I created a little standard test project, with the current
> KDevelop version. Yes this actually still works :-)
> 
> When I close on of the source file, say e.g. main.cpp, and
> reopen it immediately after that by clickin on the file in
> the Files tab, kdeveleop crashes as follows:
> 
> #0  0x59d64 in CKDevelop::switchToFile (this=0x2b5bd8, filename={
>       static null = {
>         static null = <same as static member of an already seen type>,
>         d = 0x2783f0, static shared_null = 0x2783f0}, d = 0x3ef6d8,
>       static shared_null = 0x2783f0}, line=-1, col=0,
> bForceReload=false,
>     bShowModifiedBox=6100544) at ckdevelop_noslot.cpp:862

Yes, I think I understand what happens:

At the beginning of CKDevelop::switchToFile there is:

  CEditWidget* pCurEditWidget = m_docViewManager->currentEditView();

and then pCurEditWidget is used like this for example:

  if (pCurEditWidget)
    editWidgetName = pCurEditWidget->getName(); //FB

but if you set some traces in the right places like :

CEditWidget::~CEditWidget() {
  debug("CEditWidget destructor : %d !\n", this);
}

and

CEditWidget* DocViewMan::currentEditView() 
{
  debug("getting m_pCurEditView : %d !\n", m_pCurEditView);
  return m_pCurEditView; 
};

you will get something like the following:


getting m_pCurEditView : 138237768 !

CEditWidget destructor : 138237768 !

KWrite destructor !

KWriteView destructor !

KWriteView release buffer !

  Switching to file
/import/kde2-devel/kdev1.4/kdevelop/kdevelop/caddnewtranslationdlg.h @
line 32
getting m_pCurEditView : 138237768 !


Here you see that the m_pCurEditView points to a CEditWidget that has
been destroyed before, so we get a beautifull crash !!!


So what is needed to fix this crash is to make sure that all the
m_pCurXXXX are reset to NULL when the object they point to is deleted.

Falk could you do it ?


Regards,
Christian.

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