I have not figured out yet whether the bug is a regression or not, currently bisecting. If anyone wants to reproduce it, sparc64 porterboxes are available through the gcc compile farm [1].
I am certainly interested in trying. I have never been able to get much working on my M3000 or M4000 equipment and most of my older stuff is just laying in a pile in a warehouse. -- Dennis Clarke RISC-V/SPARC/PPC/ARM/CISC UNIX and Linux spoken GreyBeard and suspenders optional