From 3c68488a1e3d8717a1534aca3f8c52a0ff5fa30e Mon Sep 17 00:00:00 2001
From: Georgy Evtushenko <evtushenko.georgy@gmail.com>
Date: Thu, 26 Aug 2021 21:53:10 +0300
Subject: [PATCH] Fix default constructor of counting iterator

---
 testing/counting_iterator.cu        | 8 ++++++++
 thrust/iterator/counting_iterator.h | 6 +++---
 2 files changed, 11 insertions(+), 3 deletions(-)

diff --git a/testing/counting_iterator.cu b/testing/counting_iterator.cu
index eede510fc..ebefe4d64 100644
--- a/testing/counting_iterator.cu
+++ b/testing/counting_iterator.cu
@@ -8,6 +8,14 @@
 
 THRUST_DISABLE_MSVC_POSSIBLE_LOSS_OF_DATA_WARNING_BEGIN
 
+template <typename T>
+void TestCountingDefaultConstructor(void)
+{
+  thrust::counting_iterator<T> iter0;
+  ASSERT_EQUAL(*iter0, T{});
+}
+DECLARE_GENERIC_UNITTEST(TestCountingDefaultConstructor);
+
 void TestCountingIteratorCopyConstructor(void)
 {
     thrust::counting_iterator<int> iter0(100);
diff --git a/thrust/iterator/counting_iterator.h b/thrust/iterator/counting_iterator.h
index a7ef2ec7c..f66cb97ef 100644
--- a/thrust/iterator/counting_iterator.h
+++ b/thrust/iterator/counting_iterator.h
@@ -144,11 +144,11 @@ template<typename Incrementable,
     /*! \endcond
      */
 
-    /*! Null constructor initializes this \p counting_iterator's \c Incrementable
-     *  counter using its null constructor.
+    /*! Default constructor initializes this \p counting_iterator's counter to
+     * `Incrementable{}`.
      */
     __host__ __device__
-    counting_iterator() {}
+    counting_iterator() : super_t(Incrementable{}) {}
 
     /*! Copy constructor copies the value of another \p counting_iterator into a
      *  new \p counting_iterator.