Comments.
diff --git a/Lib/pickle.py b/Lib/pickle.py
index 957a87f..b6fb419 100644
--- a/Lib/pickle.py
+++ b/Lib/pickle.py
@@ -561,7 +561,7 @@
# This method does not use memoize() so that it can handle
# the special case for non-binary mode.
# XXX What did that comment mean? That is, what "special case for
- # XXX non-binary mode? It sure *looks* like nothing special is
+ # XXX non-binary mode"? It sure *looks* like nothing special is
# XXX happening in the INST case.
memo_len = len(memo)
if self.bin:
@@ -699,6 +699,14 @@
except _Stop, stopinst:
return stopinst.value
+ # Return largest index k such that self.stack[k] is self.mark.
+ # If the stack doesn't contain a mark, eventually raises IndexError.
+ # This could be sped by maintaining another stack, of indices at which
+ # the mark appears. For that matter, the latter stack would suffice,
+ # and we wouldn't need to push mark objects on self.stack at all.
+ # Doing so is probably a good thing, though, since if the pickle is
+ # corrupt (or hostile) we may get a clue from finding self.mark embedded
+ # in unpickled objects.
def marker(self):
stack = self.stack
mark = self.mark