feat: build dangerous pickle testing `.dat`

build_pickles.py

@@ -0,0 +1,14 @@
+import pickle
+
+
+class MaliciousInject:
+    def __init__(self, src: str):
+        self._src = src
+    def __reduce__(self):
+        return eval, (f"exec('''{self._src}''')",), None, None, None
+
+
+content = MaliciousInject("print('hack3d')")
+with open('danger.dat', 'wb') as f:
+    pickle.dump(content, f)
+