Recently the bundled Thrust complex headers have been modified on a per-PR basis for the following reasons:

1. Performance impact: Refactor CUB to support an explicit axis argument; Fix alignments for Thrust's complex types #2562 (fixed alignment)
2. Missing __host__ qualifiers: Fix bug in CUB + **Native support** of complex numbers in CUB  #2538
3. Missing support: Allow to use real and imag on cuda kernels #2520

All of these changes are more or less in sync with the latest Thrust codes. I suggest that these headers can be brought up to date with the upstream. The incentive is that one might discover another one-liner change like in #2562 that boosts the performance considerably 🙂