fix: update mimalloc for thread lifecycle safety - #48
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hadronzoo
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August 20, 2026 14:06
hadronzoo
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August 20, 2026 14:07
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This change pins the Rust mimalloc wrapper to commit
6d4c41bb10c6d9da1d1b6f07b38c4cc051667f11. That commit embeds mimalloc v3.4.5.Mimalloc v3.3.2 can identify the first worker that loads a shared library as its main thread. The worker can exit while the process remains active. Mimalloc then frees its static main heap. A later allocation can dereference a null thread-data pointer and cause
SIGSEGVat address0x18.This failure affects shared libraries that hosts load from worker threads. The defect is not specific to Prosody or its client wrappers.
The update fixes microsoft/mimalloc#1287. The pinned wrapper commit comes from purpleprotocol/mimalloc_rust#169.
The dependency remains pinned until the wrapper publishes the fixed source on crates.io. A TODO comment records that removal condition.