With the introduction of image accessors and their included lock-mechanism, the OverwriteSliceImageFilterTest fails due to a deadlock.
Since macros like AccessByItk use image accessors implicitly, an improper handling of itk image pointers can lead to a deadlock.
Unfortunately the SegmentationInterpolationTest depends on the OverwriteSliceImageFilterTest. Thus, it was necessary to disable that test too.
The deadlock occurs in CompareImageSliceHelper::CompareSlice, which is called in line 111. A separate slice image created from ExtractImageFilter is compared with a slice of its 3D input image. However, CompareSlice tries to compare the 3D input image with itself. This behavior does not make any sense, is not intended and leads to a double access request from the same thread and thus to a deadlock.
Unfortunately it is unknown, why this behavior occurs. Before using an AccessByItk macro, the two slice images are different. Right before calling ImageToItk->Update(), which leads to the deadlock, the 3D image is stored in ImageToItk instead of the slice image, although ImageToItk->SetInput gets the slice.
Maybe this problem disappears when replacing ExtractImageFilter with ExtractSliceFilter. We don't know much about the ExtractImageFilter and it is deprecated anyway, so a replacement could be contemplated...
[c2493a]: Merge branch 'bug-13309-OverwriteSliceImageFilterTest'
2012-10-24 14:27:23 Joseph Grres [0dcea1]
Reactivated test and repaired OverwriteSliceImageFilterTest
It wasn't necessary to replace ExtractImageFilter with ExtractSliceFilter.
We only had to add a Clone() call to make sure that the memory area of the 3D input image is different to the extracted 2D slice image.