[BUG]: cuda::std::common_type broken

[cliffburdick]

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

Thrust

Describe the bug

cuda::std::common_type does not work properly with complex types in CUDA 12.6 due to an issue with nvcc. The issue is due to a pragma used in CCCL in version 2.5.0 and above, which allows CCCL 2.4.0 to work properly. However, 2.4.0 is not supported in CTK 12.6 since it ships with 2.5.0. This issue is to find a workaround until CTK is fixed that allows common_type to be used in CCCL.

How to Reproduce

Use cuda::std::common_type with a complex type in CTK 12.6.

Expected behavior

cuda::std::common_type shows no compiler errors when used correctly.

Reproduction link

No response

Operating System

No response

nvidia-smi output

No response

NVCC version

No response

[fbusato]

should not be related but worth mentioning #2419 [BUG]: is_common_type trait is broken when mixing rvalue references