Incompatibility between thmtools and hyperref packages in Tex Live 2024 and 2025 #396
Description
Packages involved:
TL-2024 {thmtools}[2023/05/04 v0.76], {hyperref}[2024-11-05 v7.01l]
TL-2025 {thmtools}[2023/05/04 v0.76], {hyperref}[2025-07-12 v7.01o]
Links to theorem-like environments defined by thmtools, that are produced by hyperrref-packages [2024-11-05 v7.01l] in TeXLive-2024 and [2025-07-12 v7.01o] in TeXLive-2025, do not work correctly.
Here is an `almost' minimal working example:
% !TEX TS-program = pdflatex
\documentclass{article}
\usepackage{amsthm}
\usepackage{thmtools}
\declaretheoremstyle[%
headfont=\color{blue}\normalfont\bfseries,
bodyfont=\color{black}\normalfont\itshape,
]{coloredtm}
\declaretheorem[%
style=coloredtm,
name=Theorem,
numberwithin=section
]{tm}
\declaretheoremstyle[%
headfont=\color{blue}\normalfont\bfseries,
bodyfont=\color{black}\normalfont,
]{coloreddef}
\declaretheorem[%
style=coloreddef,
name=Example,
sibling=tm
]{exa}
\declaretheorem[%
style=coloreddef,
name=Definition,
sibling=tm
]{dfn}
\usepackage[colorlinks]{hyperref}
\begin{document}
\section{Section 1}
\begin{exa} \label{IntroExa1}
This is Example 1.1, \emph{not} 2.1,!
\end{exa}
\subsection{}
\begin{dfn}\label{def:1.1}
This is Definition 1.2.
\end{dfn}
\begin{exa}\label{ExaLMS}
This is Example 1.3.
\end{exa}
\subsection{}
\begin{exa}\label{rate}
This is Example 1.4, \emph{not} 2.4,!
\end{exa}
\subsection{}
\begin{exa}
This is Example 1.5.
\end{exa}
\begin{exa}[Yet another example] \label{Elaine}
This is Example 1.6.
\end{exa}
%%%%%%%%%%%%%%%%%%%%%%%
\section{Section 2}
\begin{exa}\label{ExaLip1}
This is Example 2.1.
\end{exa}
\subsection{}
\begin{exa}\label{ExaLip2}
This is indeed Example 2.2.
\end{exa}
\begin{exa}\label{ExaLip3}
This is Example 2.3
\end{exa}
\begin{exa}\label{ExaLip4}
This is Example 2.4
\end{exa}
See Examples~\ref{ExaLip1}, \ref{ExaLip2}, and~\ref{ExaLip4}.
\end{document}
Until TeXLive-2023, including
TL-2023 {thmtools}[2023/05/04 v0.76], {hyperref}[2023-11-26 v7.01g]
all the way down to TL-2015, these links work as they should.
Same with "numberwithin=chapter" in case of \documentclass{book}.