BUG: Guarantee array contains enough elements for access in loop

Guarantee array contains enough elements for access in loop. Specifically, the array must contain at least two elements so that the sorting can take place.
InsightSoftwareConsortium · Jan 12, 2022 · 90f7396 · 90f7396
1 parent 4804adc
commit 90f7396
Showing 1 changed file with 2 additions and 2 deletions.
diff --git a/Modules/Filtering/Thresholding/include/itkThresholdLabelerImageFilter.hxx b/Modules/Filtering/Thresholding/include/itkThresholdLabelerImageFilter.hxx
@@ -47,9 +47,9 @@ ThresholdLabelerImageFilter<TInputImage, TOutputImage>::BeforeThreadedGenerateDa
 {
   auto size = static_cast<unsigned int>(m_Thresholds.size());
 
-  for (unsigned int i = 0; i < size - 1; ++i)
+  for (unsigned int i = 1; i < size; ++i)
   {
-    if (m_Thresholds[i] > m_Thresholds[i + 1])
+    if (m_Thresholds[i - 1] > m_Thresholds[i])
     {
       itkExceptionMacro(<< "Thresholds must be sorted.");
     }