[Bug c++/125656] "warning: left shift count >= width of type [-Wshift-count-overflow]" inaccurate

[mattreecebentley at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=125656

--- Comment #5 from Matt Bentley <mattreecebentley at gmail dot com> ---
Created attachment 64669
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=64669&action=edit
Preprocessor output

See attached. 
I'll add the code separately.