Document the exceptions that now get raised on invalid parameters.
diff --git a/Doc/lib/libcopyreg.tex b/Doc/lib/libcopyreg.tex
index 2032172..bdeca88 100644
--- a/Doc/lib/libcopyreg.tex
+++ b/Doc/lib/libcopyreg.tex
@@ -15,7 +15,9 @@
\begin{funcdesc}{constructor}{object}
- Declares \var{object} to be a valid constructor.
+ Declares \var{object} to be a valid constructor. If \var{object} is
+ not callable (and hence not valid as a constructor), raises
+ \exception{TypeError}.
\end{funcdesc}
\begin{funcdesc}{pickle}{type, function\optional{, constructor}}
@@ -25,5 +27,6 @@
tuple. The optional \var{constructor} parameter, if provided, is a
callable object which can be used to reconstruct the object when
called with the tuple of arguments returned by \var{function} at
- pickling time.
+ pickling time. \exception{TypeError} will be raised if
+ \var{object} is a class or \var{constructor} is not callable.
\end{funcdesc}