[quinnj-bot]

Every SSLStream's two BIOs use one BIO method, BIO_STREAM_METHOD, created in __init__. It had a finalizer (BIO_meth_free). Julia runs every finalizer at exit, also for live objects, while other threads keep running, so a stream created (BIO_new) or freed (SSL_free → BIO_free, which calls the method's destroy) on another thread after that finalizer ran used a freed method, and after free set the pointer to C_NULL, a NULL one: a segfault in BIO_new_ex at exit.

The method now has no finalizer and lives as long as the process, like OpenSSL's own static BIO_s_* methods. Only __init__ calls this constructor.

Verification

• New testset StreamMethodOutlivesFinalizers: a subprocess runs the method's finalizer (as exit would), then makes a stream. On main it segfaults in BIO_new_ex (the test fails); with the fix it passes.
• Stress: 3 threads create a stream on an existing socket and free its SSL object (what close does) in a loop while the main thread calls exit(0), -t 4. main: 12 of 20 runs crashed (SIGSEGV in BIO_new_ex); this branch: 0 of 20.
• Full suite on Julia 1.12 -t 4: passes.

Self-review

• Callers: BIOMethod(::String) is only called from __init__; the BIOMethod(::Ptr) constructor (OpenSSL's static methods) never had a finalizer. A caller that makes its own BIOMethod("name") now has to free it.
• Exit: stream finalizers that run at exit (SSL_free → BIO_free → the method's destroy) now always see a live method. The method's memory is reclaimed by the process exit; OpenSSL's own atexit cleanup does not touch it.
• No change to stream behavior otherwise: the same method and callbacks as before.

🤖 Generated with Claude Code

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 83.05%. Comparing base (14a9842) to head (d1fa6de).

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #109      +/-   ##
==========================================
- Coverage   83.07%   83.05%   -0.02%     
==========================================
  Files           2        2              
  Lines        1341     1340       -1     
==========================================
- Hits         1114     1113       -1     
  Misses        227      227              

☔ View full report in Codecov by Harness.
📢 Have feedback on the report? Share it here.

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.