raulcd opened a new pull request, #50555:
URL: https://github.com/apache/arrow/pull/50555
### Rationale for this change
A new version of mimalloc was released. The existing version of mimalloc can
cause a segmentation fault as seen on the referenced issue.
### What changes are included in this PR?
Bumping the mimalloc version.
### Are these changes tested?
Yes, via CI and archery.
I've also tested the minimal reproducer from the issue:
```
import threading
def imp():
import pyarrow # dlopens libarrow -> bundled mimalloc initializes on
this thread
def alloc():
import pyarrow as pa
pa.array(["x"] * 5000)
a = threading.Thread(target=imp); a.start(); a.join()
b = threading.Thread(target=alloc); b.start(); b.join()
```
The above cause a segfault on every execution with pyarrow 25.0.0 on a local
Python 3.14. With the new built wheel with the new mimalloc version, I haven't
been able to reproduce the segfault after several attempts.
### Are there any user-facing changes?
No
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