"empty glob" warnings cannot be suppressed.

[exhuma]

Describe the bug

Setting the following option in conf.py has no effect:

suppress_warnings = ["toc.empty_glob"]

If I have this directive:

.. toctree::
  :glob:

  modules/*

And the "modules" folder is empty a warning about an "empty glob" is emitted.

This prevents me from using "--fail-on-warning".

How to Reproduce

• conf.py:

  suppress_warnings = ['toc.empty_glob']
  

• index.rst

  bug-demo documentation
  ======================
  
  
  .. toctree::
     :glob:
  
     modules/*
  

• build command

  uv run sphinx-build -M html . _build
  

Environment Information

Platform:              linux; (Linux-6.17.0-22-generic-x86_64-with-glibc2.42)
Python version:        3.14.2 (main, Dec 17 2025, 21:08:09) [Clang 21.1.4 ])
Python implementation: CPython
Sphinx version:        9.1.1+/e44a40eb2
Docutils version:      0.22.3
Jinja2 version:        3.1.6
Pygments version:      2.19.2

Sphinx extensions

Additional context

No response