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-rw-r--r--macros/latex/contrib/titlesec/titlesec.sty9
1 files changed, 6 insertions, 3 deletions
diff --git a/macros/latex/contrib/titlesec/titlesec.sty b/macros/latex/contrib/titlesec/titlesec.sty
index f1f943fd21..caf149e0da 100644
--- a/macros/latex/contrib/titlesec/titlesec.sty
+++ b/macros/latex/contrib/titlesec/titlesec.sty
@@ -34,7 +34,7 @@
% ~~~~~~~
\NeedsTeXFormat{LaTeX2e}
-\ProvidesPackage{titlesec}[2019/07/16 v2.11 Sectioning titles]
+\ProvidesPackage{titlesec}[2019/09/09 v2.12 Sectioning titles]
% Initialization
% ~~~~~~~~~~~~~~
@@ -1572,13 +1572,16 @@
\ttl@a}
\def\ttl@extract#1{%
+ \ifx#1\@undefined
+ \let#1\relax % Avoid error if undefined
+ \fi
\expandafter\in@\expandafter\@startsection\expandafter{#1}%
\ifin@
\expandafter\ttl@@extract#1#1%
\else
\PackageWarningNoLine{titlesec}%
- {Non standard sectioning command detected\MessageBreak
- Using default spacing and no format}
+ {Non standard sectioning command \string#1\MessageBreak
+ detected. Using default spacing and no format}%
\titlespacing*#1{\z@}{*3}{*2}%
\fi}