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Reproducible crash in mi_stats_add() on thread-end

Status: Open.

#1320 In microsoft/mimalloc;

· HSNB opened on Jun 24, 2026

V3.3.2 mi_theap_set_default() declared and documented, but not defined.

Status: Open.

#1318 In microsoft/mimalloc;

· kalaxy opened on Jun 23, 2026

_mi_heap_delayed_free_all can spin forever when a page is stuck in MI_DELAYED_FREEING (priority-inversion livelock on a core-pinned, priority-scheduled platform)

Status: Open.

#1317 In microsoft/mimalloc;

· emrahsungu opened on Jun 23, 2026

Requesting Documentation for Using Subprocess

Status: Open.

#1316 In microsoft/mimalloc;

· kalaxy opened on Jun 23, 2026

Use-after-free when setenv reallocates environ during early option init

Status: Open.

#1314 In microsoft/mimalloc;

· duke-gh opened on Jun 22, 2026

Segfault with 1 arena through mi_manage_os_memory_ex and multiple per-thread heaps through mi_heap_new_in_arena

Status: Open.

#1313 In microsoft/mimalloc;

· MIvanchev opened on Jun 19, 2026

v3: arena growth wedges at the 16 GiB reserve cap (info_slices 521 >= 512); all later allocations fall back to per-allocation OS mmap and exhaust vm.max_map_count

Status: Open.

#1309 In microsoft/mimalloc;

· andrewgazelka opened on Jun 12, 2026

Assertion failed in _mi_arenas_page_abandon on macOS arm64 under high multi-thread load

Status: Open.

#1306 In microsoft/mimalloc;

· tuxzz opened on Jun 5, 2026

Reproducible crash in realloc with libcurl and libopenssl

Status: Open.

#1304 In microsoft/mimalloc;

· HSNB opened on Jun 4, 2026

Faster mi_ptr_page in v3

Status: Open.

#1295 In microsoft/mimalloc;

· Zoxc opened on May 16, 2026

mimalloc(v3.2.8) crashed on mi_theap_malloc

Status: Open.

#1292 In microsoft/mimalloc;

· firefly-insky opened on May 13, 2026

Illegal instruction on old CPU and v3.2.x or 3.3.x when compiling with VS2026

Status: Open.

#1291 In microsoft/mimalloc;

· lrms opened on May 12, 2026