nickdesaulniers wrote: Good catch with https://github.com/llvm/llvm-project/pull/86147/commits/189c99a76e97bc8e7f8b699d3fdc1ac93930fb67. That's pretty subtle. It matches libcxx/include/__iterator/reverse_iterator.h so LGTM https://github.com/llvm/llvm-project/pull/86147