Expand min date when passing

base/ltclass.dtx

@@ -33,7 +33,7 @@
 %<*driver>
 % \fi
 \ProvidesFile{ltclass.dtx}
-             [2018/04/08 v1.2g LaTeX Kernel (Class & Package Interface)]
+             [2018/04/08 v1.2h LaTeX Kernel (Class & Package Interface)]
 % \iffalse
 \documentclass{ltxdoc}
 \GetFileInfo{ltclass.dtx}
@@ -1951,6 +1951,7 @@
 %
 %  \begin{macro}{\load@onefilewithoptions}
 %  \begin{macro}{\@onefilewithoptions}
+%   \changes{v1.2h}{2018-04-08}{Pass expanded date}
 %    the best place to add the rollback code is at the point where
 %    |\@onefilewithoptions| is called to load a single class or
 %    package.
@@ -2001,7 +2002,13 @@
 %    necessarily a ``minimal date'' so instead of passing it on we
 %    pass on |\pkgcls@mindate|.
 %    \begin{macrocode}
-  \load@onefilewithoptions#1[#2][\pkgcls@mindate]#4%
+  \begingroup
+  \edef\reserved@a{%
+    \endgroup
+    \unexpanded{\load@onefilewithoptions#1[#2]}%
+    [\pkgcls@mindate]%
+    \unexpanded{#4}}%
+   \reserved@a
  }
 \fi
 %    \end{macrocode}