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Xalan segfault

September 30th, 2013 Leave a comment Go to comments

When using xalan-c 1.10 and the supporting package xerces-c (3.0.1) from EPEL, Xalan would segfault when transforming xml with xslt. E.g.

[[email protected] generate]# Xalan test.xml test.xsl
 Segmentation fault (core dumped)

/var/log/messages didn’t have any helpful information:

Sep 30 17:52:01 box kernel: Xalan[25236]: segfault at 18 ip 00007f5b44758cb9 sp 00007fffa8ff33d0 error 4 in libxalan-c.so.110.0[7f5b444d3000+3e2000]

There seems to be a bug open for this at EPEL (BugĀ 807816 – Xalan-c segfaults on any input), but it has not been acknowledged or worked on.

I traced the problem to an incompatibility between xalan-c 1.10 and xerces-c 3.x. There is a patch as part of the EPEL xalan-c rpm which is meant to allow for this, but it seems broken as the source rpm didn’t compile for me.

An easy fix here is to upgrade both xalan-c and xerces-c to the latest version. I hacked together rpms for these based on the work already done in EPEL:

xalan-c-1.11.0-1.el6.src.rpm
xerces-c-3.1.1-1.el6.src.rpm

After initial testing it seems that this fixes the problem and XML can now be transformed in Xalan with XSLT

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