The following stopped working after I updated MikTeX today:
\documentclass{article}
\usepackage{amsthm}
\usepackage{hyperref}
\usepackage{cleveref}
\newtheorem{definition_}[equation]{Definition}
\begin{document}
\begin{definition_}[Something]
Something
\end{definition_}
\end{document}
The error is
No counter 'd' defined. \begin{definition_}
Am I doing something wrong, or is this is a bug somewhere? The document builds fine if I remove any of the three \usepackages, or remove [equation].
