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-rw-r--r--gnu/packages/patches/docbook-xsl-nonrecursive-string-subst.patch39
1 files changed, 39 insertions, 0 deletions
diff --git a/gnu/packages/patches/docbook-xsl-nonrecursive-string-subst.patch b/gnu/packages/patches/docbook-xsl-nonrecursive-string-subst.patch
new file mode 100644
index 0000000000..4199dd18a5
--- /dev/null
+++ b/gnu/packages/patches/docbook-xsl-nonrecursive-string-subst.patch
@@ -0,0 +1,39 @@
+Use a non-recursive replace function when the parser supports it.
+
+https://bugs.gnu.org/29782
+https://bugzilla.samba.org/show_bug.cgi?id=9515
+https://bugzilla.gnome.org/show_bug.cgi?id=736077 (for xsltproc)
+
+Patch copied from Debian:
+https://anonscm.debian.org/cgit/collab-maint/docbook-xsl.git/tree/debian/patches/765567_non-recursive_string_subst.patch
+
+Description: use EXSLT "replace" function when available
+ A recursive implementation of string.subst is problematic,
+ long strings with many matches will cause stack overflows.
+Author: Peter De Wachter <pdewacht@gmail.com>
+Bug-Debian: https://bugs.debian.org/750593
+
+--- a/lib/lib.xsl
++++ b/lib/lib.xsl
+@@ -10,7 +10,10 @@
+ This module implements DTD-independent functions
+
+ ******************************************************************** -->
+-<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform" version="1.0">
++<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
++ xmlns:str="http://exslt.org/strings"
++ exclude-result-prefixes="str"
++ version="1.0">
+
+ <xsl:template name="dot.count">
+ <!-- Returns the number of "." characters in a string -->
+@@ -56,6 +59,9 @@
+ <xsl:param name="replacement"/>
+
+ <xsl:choose>
++ <xsl:when test="function-available('str:replace')">
++ <xsl:value-of select="str:replace($string, string($target), string($replacement))"/>
++ </xsl:when>
+ <xsl:when test="contains($string, $target)">
+ <xsl:variable name="rest">
+ <xsl:call-template name="string.subst">