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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

Apple FIXED_SLOT causes SIGABRT when multiple statically-linked instances coexist — no cflag can select THREAD_LOCAL

Status: Open.

#1301 In microsoft/mimalloc;

· shulaoda opened on May 27, 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

When mi_os_prim_alloc_aligned falls back on overallocation, it drops allow_large

Status: Open.

#1290 In microsoft/mimalloc;

· moskupols opened on May 9, 2026

[Crash] mimalloc v3.3.1 crash on android in multi thread allocation

Status: Open.

#1288 In microsoft/mimalloc;

· p2kyc0ng opened on May 8, 2026

mimalloc >= 3.3.0 causes segmentation faults when used from multiple threads

Status: Open.

#1287 In microsoft/mimalloc;

· adamreeve opened on May 5, 2026

RSS regression: v3.1.5 → v3.3.0 shows +81% VmRSS on musl/Alpine (26 MB → 47 MB)

Status: Open.

#1282 In microsoft/mimalloc;

· justeff opened on Apr 23, 2026

LLM audit

Status: Open.

#1271 In microsoft/mimalloc;

· Zoxc opened on Apr 18, 2026

Junk filling with mimalloc

Status: Open.

#1265 In microsoft/mimalloc;

· jmather-sesi opened on Apr 16, 2026