> in addition to its direct usage of AVX2 functions and types, it also made a call to the BZHI and LZCNT intrinsics/asm instructions – which rustc/llvm do not r

> in addition to its direct usage of AVX2 functions and types, it also made a call to the BZHI and LZCNT intrinsics/asm instructions – which rustc/llvm do not recognize as being supported via the avx2 feature! So although (to the best of this developer’s knowledge) there does not exist a processor on the face of this planet that supports AVX2 but doesn’t support BZHI and LZCNT Looks like a "bug" or better put needed enhancement to LLVM.