bugfix

Author: huettenhain

refinery/units/encoding/esc.py

@@ -11,7 +11,6 @@ class esc(Unit):
     Encodes and decodes common ASCII escape sequences.
     """
     _ESCAPE = {
-        0x00: BR'\0',
         0x07: BR'\a',
         0x08: BR'\b',
         0x0C: BR'\f',
@@ -93,7 +92,7 @@ def unescape(match: re.Match[bytes]):
             RB'\\(u[a-fA-F0-9]{4}|x[a-fA-F0-9]{1,2}|[0-7]{1,3}|.)', unescape, data)
         return data
 
-    def reverse(self, data):
+    def reverse(self, data: bytearray):
         if self.args.unicode:
             string = data.decode(self.codec).encode('UNICODE_ESCAPE')
         else:

test/units/encoding/test_esc.py

@@ -113,3 +113,8 @@ def test_regression_sneaky2fa_user_agents(self):
         goal = 'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/91.0.4472.124 Safari/537.36'
         test = data | self.load() | str
         self.assertEqual(goal, test)
+
+    def test_invertible_with_zero_bytes(self):
+        data = B'FOO\x005BAR'
+        test = data | -self.load() | self.load() | bytes
+        self.assertEqual(test, data)