Turn remaining malformed-input crashes into Error

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>

1 files changed, 16 insertions, 0 deletions

diff --git a/tests/test_library.py b/tests/test_library.py
index 84fa3cc..7e06ca4 100644
--- a/tests/test_library.py
+++ b/tests/test_library.py
@@ -89,3 +89,19 @@ class LibraryTest(unittest.TestCase):
         p = Path(self.tmp.name) / "x.duf"
         p.write_text(json.dumps({"x": 1}))
         self.assertEqual(read_dson(p), {"x": 1})
+
+
+class ReadDsonCrashTest(unittest.TestCase):
+    def read(self, data):
+        with tempfile.TemporaryDirectory() as d:
+            p = Path(d) / "x.dsf"
+            p.write_bytes(data)
+            read_dson(p)
+
+    def test_corrupt_gzip_is_error(self):
+        with self.assertRaises(Error):
+            self.read(b"\x1f\x8b\x08\x00" + b"\xff" * 20)
+
+    def test_deep_nesting_is_error(self):
+        with self.assertRaises(Error):
+            self.read(b"[" * 200000)