set catcode of colon to other in \hyper@normalise, issue #340

ChangeLog.txt

@@ -1,3 +1,6 @@
+2024-05-22 Ulrike Fischer
+	* hyperref.dtx: add \@makeother{:} to \hyper@normalise, issue #340
+
 2024-04-22 Ulrike Fischer
 	* hyperref.dtx: remove auxhook package.
 

hyperref.dtx

@@ -7413,7 +7413,8 @@
 % command, you can use |#| and |%| unescaped, to produce themselves.
 % even if, say, |#| is entered as |#| it will be converted to |\#|
 % so it does not die if written to an aux file etc. |\#| will write
-% as |#| locally while making |\special|s.
+% as |#| locally while making |\special|s. The catcode |:| is set to other
+% to avoid problems with expl3 syntax.
 %    \begin{macrocode}
 \begingroup
   \endlinechar=-1 %
@@ -7426,6 +7427,7 @@
   \catcode`\&\active
   \gdef\hyper@normalise{^^A
     \begingroup
+    \@makeother{:}^^A
     \catcode`\^^M\active
     \def^^M{ }^^A
     \catcode`\%\active

testfiles-pdftex/gh340-colon.lvt

@@ -0,0 +1,10 @@
+\documentclass{article}
+\input{regression-test}
+\usepackage{hyperref}
+\begin{document}
+\START \showoutput
+
+\catcode`\:=11
+\href{http://www.ctan.org/pkg/foo}{foo}
+
+\end{document}

testfiles-pdftex/gh340-colon.tlg

@@ -0,0 +1,55 @@
+This is a generated file for the l3build validation system.
+Don't change this file in any respect.
+Completed box being shipped out [1]
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+.\kern 0.0
+(gh340-colon.aux)
+Package rerunfilecheck Info: File `gh340-colon.out' has not changed.
+(rerunfilecheck)             Checksum: D41D8CD98F00B204E9800998ECF8427E;0.