I stumbled upon a LaTeX crash (capacity exceeded, parameter stack size=10000) and condensed it into the minimal working example below. I assume this is a bug in one of these packages? Can anyone explain what happens here? (And, if this is a bug, which of the packages is responsible?)
I experienced this on the current TeX Live with all updates from CTAN, but I'm relatively sure I had the same problem on a fresh TeX Live 2018 install (without any CTAN updates).
\documentclass{article}
% uncommenting any one of these packages avoids the crash
\usepackage{amsmath}
\usepackage{hyperref}
\usepackage{silence}
\begin{document}
\section{$\tilde O$}
% \section[]{$\tilde O$} % using this instead of line above also prevents crash, even with all three packages above
\end{document}