The warnings-off option fails to support comma-separated arguments; warning types not logged

[Fifis]

Description

The intended mechanism of warning suppression \usepackage[warnings-off = {mathtools-overbracket, mathtools-colon}]{unicode-math} produces an error: 562: Package keyvalue Error: Unknown option 'mathtools-colon' for package(keyvalue) unicode-math-luatex. \ProcessKeysOptions {unicode-math} and a warning: I'm going to overwrite the following commands from the mathtools' package: \dblcolon, \coloneqq, \Coloneqq, \eqqcolon`. Moreover, the log output contradicts the documentation.

Additional information

• Relevant for LuaTeX
• This bug is related to the issue Anonymous warnings #552
• Discussion on Stackexchange

Minimal example demonstrating the issue

% !TeX program = lualatex
\documentclass[12pt]{book}
\usepackage{mathtools}
\usepackage{fontspec}
% \usepackage{unicode-math}
% \usepackage[warnings-off = {mathtools-colon}]{unicode-math}
% \usepackage[warnings-off = {mathtools-overbracket}]{unicode-math}
\usepackage[warnings-off = {mathtools-overbracket, mathtools-colon}]{unicode-math}
\setmainfont{Times New Roman}
\setmathfont{XITS Math}

\begin{document}
Gauss said: $\sum_{i=1}^{100} n = 5050$.
\end{document}

Further details

I am getting an error in LuaHBTeX, Version 1.18.0 (TeX Live 2024/Arch Linux), Development id: 7611 when trying to suppress warnings, as documented.

The documentation (um-doc-main.tex) mentions the syntax but the example below will show that this does not work:

As an experimental feature, these can be turn off on an individual basis with the package option |warnings-off| which takes a comma-separated list of warnings to suppress.
A warning will give you its name when printed on the console output; e.g.,
\begin{Verbatim}
  * unicode-math warning: "mathtools-colon"
  *
  * ... <warning message> ...
\end{Verbatim}
This warning could be suppressed by loading the package as follows:
\begin{Verbatim}
  \usepackage[warnings-off={mathtools-colon}]{unicode-math}
\end{Verbatim}

As per many recommendations, I am loading the packages in this order: mathtools, then fontspec, then unicode-math. The comma-separated option for suppressing warnings does not work:

• \usepackage{unicode-math} produces 2 warnings: Using \overbracket and \underbracket from mathtools' packageandI'm going to overwrite the following commands from the mathtools' package: \dblcolon, \coloneqq, \Coloneqq, \eqqcolon.

• Using [warnings-off = {mathtools-colon}] or [warnings-off = {mathtools-overbracket}] works, but leaves the other warning.

Also, contrary to the documentation, \jobname.log does not contain the warning names:

...
Package unicode-math Warning: Using \overbracket and \underbracket from
(unicode-math)                `mathtools' package.
(unicode-math)                 
(unicode-math)                 Use \Uoverbracket and \Uunderbracket for
(unicode-math)                original `unicode-math' definition.


Package unicode-math Warning: I'm going to overwrite the following commands
(unicode-math)                from the `mathtools' package: 
(unicode-math)                 
(unicode-math)                     \dblcolon, \coloneqq, \Coloneqq, \eqqcolon.
(unicode-math)                
(unicode-math)                 
(unicode-math)                 Note that since I won't overwrite the other
(unicode-math)                colon-like commands, using them will lead to
(unicode-math)                inconsistencies.

I should be grateful if someone could fix two birds with one drone: bring the warning names into the main log file, and allow multiple comma-separated warning types to be ignored. Or even simpler, maybe we should allow suppressing ALL warnings via something as simple as

\usepackage[warnings-off]{unicode-math}

? After all, the intended way of using YYYLaTeX is writing good code the produced no warnings on its own, right?