https://gcc.gnu.org/bugzilla/show_bug.cgi?id=94187
--- Comment #2 from David Binderman <dcb314 at hotmail dot com> --- I checked again and I see this problem in all my valgrind versions of gcc from date 20200216 onwards. I have no earlier version. I use the latest development version of valgrind. Latest release version seems to be 3.15.0 Hardware is AMD 64 bit Piledriver.