L3debug (#817)

* Fix future l3debug error on \prop_gclear:c

* Update test files with TL'22 LuaTeX primitives

* changes.txt

* Revert "Update test files with TL'22 LuaTeX primitives"

This reverts commit e4ca1f9
because GH actions is still on TL 2021

* Only clear if the prop exists

* Third time's the charm

* add a test

Co-authored-by: Frank Mittelbach <frank.mittelbach@latex-project.org>

base/changes.txt

@@ -5,11 +5,17 @@ It is provided for convenience only.  It therefore makes no claims to
 completeness or accuracy and it contains some references to files that
 are not part of the distribution.
 ================================================================================
+
 2022-05-17  Ulrike Fischer <Ulrike.Fischer@latex-project.org>
 
 	* ltmeta.dtx:
 	Added dummy definitions for target commands.
 
+2022-05-13  Phelype Oleinik  <phelype.oleinik@latex-project.org>
+
+	* lthooks.dtx (subsection{Using the hook}):
+	Avoid l3debug error on an undeclared variable in \hook_use_once:nnn.
+
 2022-05-08  Marcel Krüger  <Marcel.Krueger@latex-project.org>
 
   * utf8ienc.dtx:

base/ltdefns.dtx

@@ -32,7 +32,7 @@
 %<*driver>
 % \fi
 \ProvidesFile{ltdefns.dtx}
-             [2021/06/04 v1.5q LaTeX Kernel (definition commands)]
+             [2022/05/13 v1.5q LaTeX Kernel (definition commands)]
 % \iffalse
 \documentclass{ltxdoc}
 \GetFileInfo{ltdefns.dtx}
@@ -1601,7 +1601,7 @@
 %   But more importantly, the most common use case of copying a command is to
 %   redefine it later, while preserving the old definition, as in:
 % \begin{verbatim}
-%   \ProvideComandCopy \A \B
+%   \ProvideCommandCopy \A \B
 %   \renewcommand \B { ... \A ... }
 % \end{verbatim}
 %   then, if \verb=\A= is already defined the first line is skipped, an in this

base/lthooks.dtx

@@ -31,8 +31,8 @@
 %%% From File: lthooks.dtx
 %
 %    \begin{macrocode}
-\def\lthooksversion{v1.0t}
-\def\lthooksdate{2022/04/14}
+\def\lthooksversion{v1.0u}
+\def\lthooksdate{2022/05/13}
 %    \end{macrocode}
 %
 %<*driver>
@@ -2196,7 +2196,6 @@
 % \end{macro}
 %
 %
-%
 % \subsection{Providing new hooks}
 %
 % \subsubsection{The data structures of a hook}
@@ -4850,6 +4849,7 @@
 %   clears the hook so that any further call to \cs{hook_use:n} or
 %   \cs{hook_use_once:n} will expand to nothing.
 % \changes{v1.0r}{2021/09/06}{Clean up after \cs{UseOneTimeHook} (gh/606)}
+% \changes{v1.0u}{2022/05/13}{Check if prop exists to avoid l3debug error}
 %    \begin{macrocode}
 \cs_new_protected:Npn \@@_use_once_set:n #1
   { \@@_tl_gset:cn { g_@@_#1_reversed_tl } { I } }
@@ -4858,7 +4858,7 @@
     \@@_tl_gclear:c { @@~#1 }
     \@@_tl_gclear:c { @@_next~#1 }
     \@@_tl_gclear:c { @@_toplevel~#1 }
-    \prop_gclear:c { g_@@_#1_code_prop }
+    \prop_gclear_new:c { g_@@_#1_code_prop }
   }
 %    \end{macrocode}
 % \end{macro}

base/ltpara.dtx

@@ -15,7 +15,7 @@
 %
 %    \begin{macrocode}
 \def\ltparaversion{v1.0k}
-\def\ltparadate{2021/11/11}
+\def\ltparadate{2022/05/13}
 %    \end{macrocode}
 %<*driver>
 \documentclass{l3doc}
@@ -484,7 +484,7 @@
 %
 %    To avoid issues a paragraph started by them should always be
 %    ended by \cs{RawParEnd}\footnote{Technical note for those who
-%    know their \textit{\TeX book\/}: the \cs{RawParEnd} comand
+%    know their \textit{\TeX book\/}: the \cs{RawParEnd} command
 %    invokes the original \TeX{} engine definition of \cs{par} that
 %    (soley) triggers the paragraph builder in \TeX{} when found
 %    inside unrestricted horizontal mode and does nothing in other

base/testfiles-lthooks/lthooks-032.lvt

@@ -0,0 +1,18 @@
+
+\RequirePackage[enable-debug]{expl3}
+\ExplSyntaxOn
+\debug_on:n { check-declarations , deprecation }
+\ExplSyntaxOff
+
+\documentclass{article}
+
+\input{regression-test}
+
+
+\usepackage{tracefnt}
+
+\START
+
+\AddToHook{package/tracefnt/after}{\typeout{-> Too late so execute directly, but no error!}}
+
+\END

base/testfiles-lthooks/lthooks-032.tlg

@@ -0,0 +1,3 @@
+This is a generated file for the l3build validation system.
+Don't change this file in any respect.
+-> Too late so execute directly, but no error!