gh-110367: Fix regrtest test_worker_output_on_failure() on ASAN build

Set ASAN_OPTIONS="handle_segv=0" env var to run the test.

Author: vstinner

Lib/test/support/__init__.py

@@ -436,6 +436,14 @@ def skip_if_sanitizer(reason=None, *, address=False, memory=False, ub=False):
     return unittest.skipIf(skip, reason)
 
 
+def set_sanitizer_env_var(env, option):
+    for name in ('ASAN_OPTIONS', 'MSAN_OPTIONS', 'UBSAN_OPTIONS'):
+        if name in env:
+            env[name] += f':{option}'
+        else:
+            env[name] = option
+
+
 def system_must_validate_cert(f):
     """Skip the test on TLS certificate validation failures."""
     @functools.wraps(f)

Lib/test/test_faulthandler.py

@@ -67,11 +67,7 @@ def get_output(self, code, filename=None, fd=None):
 
         # Sanitizers must not handle SIGSEGV (ex: for test_enable_fd())
         option = 'handle_segv=0'
-        for name in ('ASAN_OPTIONS', 'MSAN_OPTIONS', 'UBSAN_OPTIONS'):
-            if name in env:
-                env[name] += f':{option}'
-            else:
-                env[name] = option
+        support.set_sanitizer_env_var(env, option)
 
         with support.SuppressCrashReport():
             process = script_helper.spawn_python('-c', code,

Lib/test/test_regrtest.py

@@ -756,8 +756,8 @@ def check_output(self, output):
         self.check_executed_tests(output, self.tests,
                                   randomize=True, stats=len(self.tests))
 
-    def run_tests(self, args):
-        output = self.run_python(args)
+    def run_tests(self, args, env=None):
+        output = self.run_python(args, env=env)
         self.check_output(output)
 
     def test_script_regrtest(self):
@@ -1188,6 +1188,11 @@ def test_crashed(self):
         code = 'import faulthandler; faulthandler._sigsegv()'
         crash_test = self.create_test(name="crash", code=code)
 
+        # Sanitizers must not handle SIGSEGV (ex: for test_enable_fd())
+        env = dict(os.environ)
+        option = 'handle_segv=0'
+        support.set_sanitizer_env_var(env, option)
+
         tests = [crash_test]
         output = self.run_tests("-j2", *tests, exitcode=EXITCODE_BAD_TEST)
         self.check_executed_tests(output, tests, failed=crash_test,