@anthonyfieroni Just tried the copy pasting your void* idea in. No dice on my machine. Seg faulted trying to run the demo. Captured some valgrind output (attached), in case its of any use. I had to keep my qbytearray segment of the patch in, else it wouldn't even get that far (attached valgrind output for that too).

I did test the demo using docker - crashed without the patch for me, and works fine with the patch - Arch Linux, 4.15.7-1-ck-haswell, x86_64
I suspect I might need to fire up an actual virtual machine to replicate.