[vtkusers] App crashes unless compiled with debug config (Windows)

[Oliver Cairncross]

(Oh sorry I'll copy it down)

What I'm doing is pretty straight forward. I haven't changed the vtk code
at all.

vtkDirectory * sourceDir = vtkDirectory::New();
sourceDir->Open(sourceString.c_str());
vtkSortFileNames * sourceFiles = vtkSortFileNames::New();
sourceFiles->SkipDirectoriesOn();
sourceFiles->NumericSortOff();
sourceFiles->SetInputFileNames(sourceDir->GetFiles());
sourceFiles->Update();

for (int i = 0; i < targetArray->GetNumberOfValues(); i++)
{
     string s1 = sourceFiles->GetFileNames()->GetValue(i); // crash!
}

Thanks
Ollie

On 3 September 2016 at 00:02, David E DeMarle <dave.demarle at kitware.com>
wrote:

> You forgot to reply all to keep the discussion on the mailing list for
> posterity.
>
> David E DeMarle
> Kitware, Inc.
> R&D Engineer
> 21 Corporate Drive
> Clifton Park, NY 12065-8662
> Phone: 518-881-4909
>
> On Fri, Sep 2, 2016 at 2:17 AM, Oliver Cairncross <op.cairncross at gmail.com
> > wrote:
>
>> What I'm doing is pretty straight forward. I haven't changed the vtk code
>> at all.
>>
>> vtkDirectory * sourceDir = vtkDirectory::New();
>> sourceDir->Open(sourceString.c_str());
>> vtkSortFileNames * sourceFiles = vtkSortFileNames::New();
>> sourceFiles->SkipDirectoriesOn();
>> sourceFiles->NumericSortOff();
>> sourceFiles->SetInputFileNames(sourceDir->GetFiles());
>> sourceFiles->Update();
>>
>> for (int i = 0; i < targetArray->GetNumberOfValues(); i++)
>> {
>>      string s1 = sourceFiles->GetFileNames()->GetValue(i); // crash!
>> }
>>
>> Thanks
>> Ollie
>>
>> On 2 September 2016 at 13:45, David E DeMarle <dave.demarle at kitware.com>
>> wrote:
>>
>>> Whatever your sourceFiles->GetFileNames object has uninitialized
>>> pointers.
>>>
>>> Debug mode initializes all values to 0, release does not (in order to
>>> save run time), but this leaves you with some pointer pointing to nonsense.
>>>
>>>
>>>
>>> David E DeMarle
>>> Kitware, Inc.
>>> R&D Engineer
>>> 21 Corporate Drive
>>> Clifton Park, NY 12065-8662
>>> Phone: 518-881-4909
>>>
>>> On Thu, Sep 1, 2016 at 11:32 PM, Oliver Cairncross <
>>> op.cairncross at gmail.com> wrote:
>>>
>>>> Hi,
>>>>
>>>> vtk 7, msvc 14, windows 10
>>>>
>>>> I've had this problem before and thought it was something bad in my
>>>> tool chain. But I've rebuild everything from scratch and it's still a
>>>> problem.
>>>>
>>>> If I do something simple like
>>>>
>>>> string s1 = sourceFiles->GetFileNames()->GetValue(i);
>>>>
>>>> it runs fine in debug mode. When I compile in RelwithDebInfo it crashes
>>>> with a bad allocation.
>>>> When I have a look at the object the there is garbage where the string
>>>> is supposed to be. As if it hasn't been initialised. I am calling an
>>>>  sourceFiles->Update() beforehand.
>>>>
>>>> Interestingly if I do
>>>>
>>>> cout << sourceFiles->GetFileNames()->GetValue(i);
>>>> string s1 = sourceFiles->GetFileNames()->GetValue(i);
>>>>
>>>> it will print to console and then crash on the next line.
>>>>
>>>> Is anyone else having this problem?
>>>>
>>>> Cheers
>>>> ollie
>>>>
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>
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