memalign always get segmentation fault when use span_size as alignment

[YogzZ]

Hi, I try to use memalign based on rpmalloc, but always get Segmentation fault when free the buffer point if I set alignment to 65536 which is same with the span_size of rpmalloc.

Then I notice the test code forbids the alignment bigger or same to span_size:

rpmalloc/test/main.c

Line 421 in 2863309

if (alignment[ialign] >= rpmalloc_config()->span_size)

Always stuck at this place:

So, it's a bug or a rule?

platform: aarch64