https://gcc.gnu.org/bugzilla/show_bug.cgi?id=120145
--- Comment #19 from Kirill A. Korinsky <kirill at korins dot ky> --- Do you mean this one? (gdb) p/x $g1 $4 = 0xfb8ee10cffeffffc (gdb) x/x $g1 0xfb8ee10cffeffffc: Cannot access memory at address 0xfb8ee10cffeffffc (gdb)