guard for #1495

latex3 · Oct 27, 2024 · c0fa0a4 · c0fa0a4
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diff --git a/required/tools/changes.txt b/required/tools/changes.txt
@@ -5,6 +5,11 @@ completeness or accuracy and it contains some references to files that
 are not part of the distribution.
 =======================================================================
 
+2024-10-27  David Carlisle  <David.Carlisle@latex-project.org>
+
+	* longtable.dtx Guard against increasing \pagegoal past \maxdimen (gh/1495)
+
+
 2024-10-12  Joseph Wright  <Joseph.Wright@latex-project.org>
 
 	* array.dtx (section{The insertion of declarations ...}):

diff --git a/required/tools/longtable.dtx b/required/tools/longtable.dtx
@@ -38,7 +38,7 @@
 %<driver> \ProvidesFile{longtable.drv}
 % \fi
 %         \ProvidesFile{longtable.dtx}
-          [2024-07-06 v4.21 Multi-page Table package (DPC)]
+          [2024-10-27 v4.22 Multi-page Table package (DPC)]
 %
 % \iffalse
 %<*driver>
@@ -1639,15 +1639,20 @@
     \LT@final@warn
   \fi
 %    \end{macrocode}
-% Force one more go with the \env{longtable} output routine.
+%   Force one more go with the \env{longtable} output routine.
+% Guard the special start of page value of "\pagegoal".
 % \changes{v4.14}{2020/02/07}
 %      {Rearrange vertical space tests for tools/3512 (floats on same page)}
+% \changes{v4.22}{2024/10/27}
+%    {Keep \cs{pagegoal} below \cs{maxdimen} gh1495}
 %    \begin{macrocode}
   \endgraf\penalty -\LT@end@pen
   \ifvoid\LT@foot\else
     \global\advance\vsize\ht\LT@foot
     \global\advance\@colroom\ht\LT@foot
-    \dimen@\pagegoal\advance\dimen@\ht\LT@foot\pagegoal\dimen@
+    \ifdim\pagegoal<\maxdimen
+      \dimen@\pagegoal\advance\dimen@\ht\LT@foot\pagegoal\dimen@
+    \fi
   \fi
 %    \end{macrocode}
 % Now close the group to return to the standard routine.