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Segfault in mi_arena_try_purge upon exit, same use case as in #1313

Status: Open.

#1367In microsoft/mimalloc;

· Mihail Ivanchev (MIvanchev) opened on Aug 16, 2026

Large RSS increase when memory is allocated by multiple threads and freed by an uninitialized thread

Status: Open.

#1364In microsoft/mimalloc;

· CunningBaldrick opened on Aug 14, 2026

dev3: two first-ever-allocation bootstrap bugs on Android (arena_reserve_lock reentrancy risk, recurse-guard emutls recursion) -- patch included

Status: Open.

#1362In microsoft/mimalloc;

· CatPieLeaf opened on Aug 10, 2026

[v3] "returned TLS index was too high" due to incorrect interpretation of TlsAlloc return value

Status: Open.

#1359In microsoft/mimalloc;

· NarutoUA opened on Aug 6, 2026

fix: avoid deadlock when growing dynamic thread-local slots

Status: Open.

#1358In microsoft/mimalloc;

· Zachary Vorhies (zackees) opened on Aug 6, 2026

v3.3.1 macOS arm64: SIGSEGV in _mi_heap_main via mi_thread_init — theap->tld is NULL on a freshly-initialized thread heap

Status: Open.

#1356In microsoft/mimalloc;

· Adam Hunter (adamhunter) opened on Aug 5, 2026

mimalloc override on macOS 26 / Darwin 25.5: free is interposed but malloc is not

Status: Open.

#1350In microsoft/mimalloc;

· Antony Hosking (hosking) opened on Aug 2, 2026

V3 perfomance charts

Status: Open.

#1335In microsoft/mimalloc;

· Oscar Smith (oscardssmith) opened on Jul 17, 2026

Use MEM_64K_PAGES?

Status: Open.

#1329In microsoft/mimalloc;

· Рика (runewalsh) opened on Jul 10, 2026

When mi_os_prim_alloc_aligned falls back on overallocation, it drops allow_large

Status: Open.

#1290In microsoft/mimalloc;

· Fedor Alekseev (moskupols) opened on May 9, 2026

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

Status: Open.

#1288In microsoft/mimalloc;

· p2k.yc0ng (p2kyc0ng) opened on May 8, 2026

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

Status: Open.

#1282In microsoft/mimalloc;

· justeff opened on Apr 23, 2026