Qt crashes on qt_memfill32

930│ template<> inline void qt_memfill(quint32 *dest, quint32 color, qsizetype count)
 931│ {                                                               
 932├───> qt_memfill32(dest, color, count);
 933│ }

(gdb) x/3i $pc
=> 0x7ffff7587271 <blend_color_argb(int, QSpan const*, void*)+896>:     movzwl 0x2(%rbx),%edx
   0x7ffff7587275 <blend_color_argb(int, QSpan const*, void*)+900>:     mov    %r12d,%esi
   0x7ffff7587278 <blend_color_argb(int, QSpan const*, void*)+903>:     callq  *0x2f5a7a(%rip)        # 0x7ffff787ccf8 <qt_memfill32>

(gdb) stepi 3
0x0000000000000000 in ?? ()