mclow.lists added a comment. In https://reviews.llvm.org/D52240#1239434, @ldionne wrote: > Marshall, what's the error we get with GCC in C++03 mode that this patch is fixing? Is there a bug.llvm.org associated to that? PR#38964 (from the title) ;-) https://llvm.org/PR38964 https://reviews.llvm.org/D52240