Assert in _mi_heap_area_init -> mi_page_block_size when calling mi_heap_visit_blocks

[sagaceilo]

Hello,
when gathering memory pool stats Im hitting this assert:

mimalloc/include/mimalloc/internal.h

Line 670 in b88ce9c

mi_assert_internal(page->block_size > 0);

page there looks like empty one:

<title>Document</title>

	Name	Value	Type
◢	page	0x0000025bbdd10000 {xthread_id=0 free=0x0000000000000000 used=0 ...}	mi_page_s *
	▶ xthread_id	0	std::atomic
	▶ free	0x0000000000000000	mi_block_s *
	used	0	unsigned short
	capacity	0	unsigned short
	reserved	0	unsigned short
	retire_expire	0 '\0'	unsigned char
	free_is_zero	false	bool
	▶ local_free	0x0000000000000000	mi_block_s *
	▶ xthread_free	0	std::atomic
	block_size	0	unsigned __int64
	▶ page_start	0x0000000000000000	unsigned char *
	▶ keys	0x0000025bbdd10038 {0, 0}	unsigned __int64[2]
	▶ theap	0x0000000000000000	mi_theap_s *
	▶ heap	0x0000000000000000	mi_heap_s *
	▶ next	0x0000000000000000	mi_page_s *
	▶ prev	0x0000000000000000	mi_page_s *
	slice_committed	0	unsigned __int64
	▶ memid	{mem={os={base=0x0000000000000000 {...} size=0 } arena={arena=0x0000000000000000 {...} slice_index=0 ...} ...} ...}	mi_memid_s

>	Game_debug.exe!_mi_heap_area_init(mi_heap_area_s * area, mi_page_s * page) Line 498	C++
 	Game_debug.exe!mi_heap_visit_page(mi_page_s * page, mi_heap_visit_info_s * vinfo) Line 2135	C++
 	Game_debug.exe!mi_heap_visit_page_at(unsigned __int64 slice_index, unsigned __int64 slice_count, mi_arena_s * arena, void * arg) Line 2152	C++
 	Game_debug.exe!_mi_bitmap_forall_set(mi_bitmap_s * bitmap, bool(*)(unsigned __int64, unsigned __int64, mi_arena_s *, void *) visit, mi_arena_s * arena, void * arg) Line 1419	C++
 	Game_debug.exe!_mi_heap_visit_blocks(mi_heap_s * heap, bool abandoned_only, bool visit_blocks, bool(*)(const mi_heap_s *, const mi_heap_area_s *, void *, unsigned __int64, void *) visitor, void * arg) Line 2175	C++
 	Game_debug.exe!mi_heap_visit_blocks(mi_heap_s * heap, bool visit_blocks, bool(*)(const mi_heap_s *, const mi_heap_area_s *, void *, unsigned __int64, void *) visitor, void * arg) Line 2199	C++

This is code Im running to get memory used from mi_heap_t:

uintt 64 total_used = 0;


		mi_heap_visit_blocks( (mi_heap_t*)m_heap, false, []( const mi_heap_t * heap, const mi_heap_area_t * area, void* block, size_t block_size, void* arg )
		{
			uint64* total_usage = (uint64*)arg;

			// When block is NULL, we are visiting a heap area (page)
			if ( area )
			{
				// Multiply the count of used blocks by the size of each block
				*total_usage += (area->used * area->block_size);
			}

			// Return true to continue visiting
			return true;
		}, &total_used );

Maybe Im doing something wrong and there is better way of getting this info.