Index: Lib/binhex.py
===================================================================
--- Lib/binhex.py	(révision 73676)
+++ Lib/binhex.py	(copie de travail)
@@ -324,11 +324,11 @@
         mark = len(self.pre_buffer)
         if self.pre_buffer[-3:] == RUNCHAR + b'\0' + RUNCHAR:
             mark = mark - 3
-        elif self.pre_buffer[-1] == RUNCHAR:
+        elif self.pre_buffer[-1:] == RUNCHAR:
             mark = mark - 2
         elif self.pre_buffer[-2:] == RUNCHAR + b'\0':
             mark = mark - 2
-        elif self.pre_buffer[-2] == RUNCHAR:
+        elif self.pre_buffer[-2:-1] == RUNCHAR:
             pass # Decode all
         else:
             mark = mark - 1