[BUG]: Host API memory access error in CUB's iterator test.

[alliepiper]

Is this a duplicate?

• I confirmed there appear to be no duplicate issues for this bug and that I agree to the Code of Conduct

Type of Bug

Silent Failure

Component

CUB

Describe the bug

https://github.com/NVIDIA/cccl/actions/runs/9606424817/job/26497170281?pr=1879

	compute-sanitizer --tool initcheck --check-device-heap yes --leak-check full --padding 512 --track-stream-ordered-races all --check-warpgroup-mma yes --require-cuda-init no --check-exit-code yes --error-exitcode 1 --nvtx true /home/coder/cccl/build/cuda12.4-gcc13/cub-cpp17/bin/cub.cpp17.test.iterator
========= COMPUTE-SANITIZER
========= Host API memory access error at host access to 0x7fb33ca00400 of size 32 bytes
=========     Uninitialized access at 0x7fb33ca00400 on access by cudaMemcpy source
=========     Saved host backtrace up to driver entry point at error
=========     Host Frame: [0x2e7d39]
=========                in /usr/lib/x86_64-linux-gnu/libcuda.so.1
=========     Host Frame:libcudart_static_e760a7280bc1af45ef561886abc194823c5edadb [0x2c3eb0]
=========                in /home/coder/cccl/build/cuda12.4-gcc13/cub-cpp17/bin/cub.cpp17.test.iterator
=========     Host Frame:libcudart_static_901c335edfe2e89188fa6b8fe3e2a2194ad05bff [0x290109]
=========                in /home/coder/cccl/build/cuda12.4-gcc13/cub-cpp17/bin/cub.cpp17.test.iterator
=========     Host Frame:cudaMemcpy [0x2eb946]
=========                in /home/coder/cccl/build/cuda12.4-gcc13/cub-cpp17/bin/cub.cpp17.test.iterator
=========     Host Frame:void test_iterator<cub::CUB_200500_600_700_800_NS::ConstantInputIterator<signed char, long>, signed char>(cub::CUB_200500_600_700_800_NS::ConstantInputIterator<signed char, long>, thrust::THRUST_200500_600_700_800_NS::detail::vector_base<signed char, thrust::THRUST_200500_600_700_800_NS::mr::stateless_resource_allocator<signed char, c2h::checked_host_memory_resource> > const&) [0x15edd4]
=========                in /home/coder/cccl/build/cuda12.4-gcc13/cub-cpp17/bin/cub.cpp17.test.iterator
=========     Host Frame:void C_A_T_C_H_T_E_M_P_L_A_T_E_T_E_S_T_F_U_N_C_0<metal::list<signed char> >() [0x1257c6]
=========                in /home/coder/cccl/build/cuda12.4-gcc13/cub-cpp17/bin/cub.cpp17.test.iterator
=========     Host Frame:Catch::RunContext::invokeActiveTestCase() [0x6dfa2]
=========                in /home/coder/cccl/build/cuda12.4-gcc13/cub-cpp17/bin/cub.cpp17.test.iterator
=========     Host Frame:Catch::RunContext::runCurrentTest(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >&, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >&) [0x86407]
=========                in /home/coder/cccl/build/cuda12.4-gcc13/cub-cpp17/bin/cub.cpp17.test.iterator
=========     Host Frame:Catch::RunContext::runTest(Catch::TestCase const&) [0x8f0ea]
=========                in /home/coder/cccl/build/cuda12.4-gcc13/cub-cpp17/bin/cub.cpp17.test.iterator
=========     Host Frame:Catch::Session::runInternal() [0x9956f]
=========                in /home/coder/cccl/build/cuda12.4-gcc13/cub-cpp17/bin/cub.cpp17.test.iterator
=========     Host Frame:Catch::Session::run() [0x99b5d]
=========                in /home/coder/cccl/build/cuda12.4-gcc13/cub-cpp17/bin/cub.cpp17.test.iterator
=========     Host Frame:main [0x3b045]
=========                in /home/coder/cccl/build/cuda12.4-gcc13/cub-cpp17/bin/cub.cpp17.test.iterator
=========     Host Frame: [0x23a8f]
=========                in /usr/lib/x86_64-linux-gnu/libc.so.6
=========     Host Frame:__libc_start_main [0x23b48]
=========                in /usr/lib/x86_64-linux-gnu/libc.so.6
=========     Host Frame:_start [0x64cf4]
=========                in /home/coder/cccl/build/cuda12.4-gcc13/cub-cpp17/bin/cub.cpp17.test.iterator

How to Reproduce

compute-sanitizer --tool initcheck --check-device-heap yes --leak-check full --padding 512 --track-stream-ordered-races all --check-warpgroup-mma yes --require-cuda-init no --check-exit-code yes --error-exitcode 1 --nvtx true /home/coder/cccl/build/cuda12.4-gcc13/cub-cpp17/bin/cub.cpp17.test.iterator

Expected behavior

No diagnostics emitted.

Reproduction link

No response

Operating System

No response

nvidia-smi output

No response

NVCC version

No response