added local group for local setting of inputpath

1 files changed, 5 insertions, 3 deletions

diff --git a/listings.dtx b/listings.dtx
index 8d5fe5b..478e787 100644
--- a/listings.dtx
+++ b/listings.dtx
@@ -14839,9 +14839,10 @@
 %    \end{macrocode}
 % |\lst@set| takes the local options, especially |inputpath=<path>| for
 % formatting the input file. So |\lstset| must be updated to have the right
-% value of |\lst@inputpath|.
+% value of |\lst@inputpath|. The whole procedure must be grouped to make
+% the change local.
 %    \begin{macrocode}
-  \def\lst@set{#1}%
+  \bgroup\def\lst@set{#1}%
   \expandafter\lstset\expandafter{\lst@set}%
   \IfFileExists{\lst@inputpath#2}%
     {\lst@InputListing{\lst@inputpath#2}}%
@@ -14854,7 +14855,8 @@
 % We must provide a valid value for |\lst@doendpe| in the (error) case that there
 % exists no file.
 %    \begin{macrocode}
-      \let\lst@doendpe\@empty}%
+  \let\lst@doendpe\@empty}%
+  \egroup
   \lst@doendpe \@newlistfalse \ignorespaces%
 }
 %    \end{macrocode}