autonum and cleveref conflict

Question

The following code produces erroneous output. When I put cleveref first, it doesn't pick up the references at all. When I put autonum first, really weird stuff happens. See the images below.

I found this reference: enter link description here This appears related, but I have autonum version 3.8, so the issue mentioned there ought to be fixed. Thoughts?

P.S.:To see the behavior, ensure that you clear the aux file after changing the order of autonum and cleveref.

\documentclass{amsart}

\usepackage{autonum}
\usepackage{cleveref}

\listfiles

\begin{document}

\begin{multline} \label{eq:longeq}
 z=a+b+c+d+e+f+g\\
 + h+i+j+k+\ell+m+n+o+p+q+r+s+t+u+v+w+x+y.
 \end{multline}

 Equation \cref{eq:longeq}.





 \begin{multline} 
 z=a+b+c+d+e+f+g\\
 + h+i+j+k+\ell+m+n+o+p+q+r+s+t+u+v+w+x+y.\label{eq:longeq2}
 \end{multline}

 Equation \cref{eq:longeq2}.


\begin{gather} \label{eq:shorteq}
 x=y 
\end{gather}

Equation \cref{eq:shorteq}
 \end{document}

Answer 1

The packages are compatible if you read the documentation. More specifically, amsmath must be loaded before cleveref which must be loaded before autonum. For example:

\documentclass{article}
\usepackage{amsmath,cleveref,autonum}
\begin{document}
\begin{multline}\label{eq:a}
 z=a+b+c+d+e+f+g\\
 + h+i+j+k+\ell+m+n+o+p+q+r+s+t+u+v+w+x+y.
\end{multline}
\begin{multline}\label{eq:b}
 z=a+b+c+d+e+f+g\\
 + h+i+j+k+\ell+m+n+o+p+q+r+s+t+u+v+w+x+y.
\end{multline}
\begin{gather}\label{eq:c}
 x=y
\end{gather}
\begin{gather}\label{eq:d}
 x=y
\end{gather}
We reference the first \verb|multline| environment, but not the second, and the second \verb|gather| environment, but not the first.
Hence. only \cref{eq:a} and \cref{eq:d} will be numbered, even though all equations are labelled.
\end{document}

However, there is an incompatibility here with the amsart class. Whereas the packages are compatible with the standard class, things don't work so well switching to amsart: