Some python tests are crashing with segmentation fault when running on debug build
Summary
$ cargo run -- -m test.test_ssl ThreadedTests.test_socketserver
Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.11s
Running `target/debug/rustpython -m test.test_ssl ThreadedTests.test_socketserver`
test_ssl: testing with 'OpenSSL 3.3.0 (rustls/0.23)' (3, 3, 0, 0, 15)
under 'Linux-6.19.14-400.asahi.fc44.aarch64+16k-aarch64-with-glibc2.43'
HAS_SNI = True
OP_ALL = 0x bfb
OP_NO_TLSv1_1 = 0x10000000
server (('127.0.0.1', 34577):34577 ('TLS_AES_256_GCM_SHA384', 'TLSv1.3', 256)):
[20/May/2026 23:23:31] "GET /test_ssl.py HTTP/1.1" 200 -
Segmentation fault (core dumped) RUST_BACKTRACE=1 cargo run -- -m test.test_ssl ThreadedTests.test_socketserver
Following patch circumvents this, so I believe it is a stack overflow really:
diff --git a/Lib/test/ssl_servers.py b/Lib/test/ssl_servers.py index 15b071e04dda..8d9331c6705f 100644 --- a/Lib/test/ssl_servers.py +++ b/Lib/test/ssl_servers.py @@ -125,6 +125,7 @@ def __init__(self, context, host=HOST, handler_class=None): handler_class or RootedHTTPRequestHandler, context) self.port = self.server.server_port + threading.stack_size(1024 * 1024 * 128) threading.Thread.__init__(self) self.daemon = True
Expected
No segmentation fault.
Actual
Segmentation fault.
Python Documentation
N/A