e2e test segfault handling

Author: Otto-AA

e2e_projects/my_lib/src/my_lib/__init__.py

@@ -1,6 +1,7 @@
 from collections.abc import Callable
 from functools import cache
 from typing import Union
+import ctypes
 
 
 def hello() -> str:
@@ -88,4 +89,9 @@ def coords(self):
 
 def escape_sequences():
     return "foo" \
-           "FOO\\\'\"\a\b\f\n\r\t\v\111\x10\N{ghost}\u1234\U0001F51F"
+           "FOO\\\'\"\a\b\f\n\r\t\v\111\x10\N{ghost}\u1234\U0001F51F"
+
+def create_a_segfault_when_mutated():
+    # when we mutate False->True, then this will segfault
+    if False:
+        ctypes.string_at(0)

e2e_projects/my_lib/tests/test_my_lib.py

@@ -1,4 +1,4 @@
-from my_lib import hello, Point, badly_tested, make_greeter, fibonacci, cached_fibonacci, escape_sequences, simple_consumer, async_consumer
+from my_lib import hello, Point, badly_tested, make_greeter, fibonacci, cached_fibonacci, escape_sequences, simple_consumer, async_consumer, create_a_segfault_when_mutated
 import pytest
 
 """These tests are flawed on purpose, some mutants survive and some are killed."""
@@ -45,3 +45,5 @@ async def test_async_consumer():
     result = await async_consumer()
     assert result == list(range(10))
 
+def test_handles_segfaults():
+    create_a_segfault_when_mutated()

tests/e2e/snapshots/my_lib.json

@@ -61,6 +61,9 @@
     "my_lib.x_escape_sequences__mutmut_2": 0,
     "my_lib.x_escape_sequences__mutmut_3": 1,
     "my_lib.x_escape_sequences__mutmut_4": 0,
-    "my_lib.x_escape_sequences__mutmut_5": 0
+    "my_lib.x_escape_sequences__mutmut_5": 0,
+    "my_lib.x_create_a_segfault_when_mutated__mutmut_1": -11,
+    "my_lib.x_create_a_segfault_when_mutated__mutmut_2": 0,
+    "my_lib.x_create_a_segfault_when_mutated__mutmut_3": 0
   }
 }