FULL PRODUCT VERSION :
java version " 1.7.0_09 "
Java(TM) SE Runtime Environment (build 1.7.0_09-b05)
Java HotSpot(TM) 64-Bit Server VM (build 23.5-b02, mixed mode)

Or

java version " 1.7.0_09 "
Java(TM) SE Runtime Environment (build 1.7.0_09-b05)
Java HotSpot(TM) Client VM (build 23.5-b02, mixed mode, sharing)

ADDITIONAL OS VERSION INFORMATION :
Microsoft Windows [version 6.1.7601]

A DESCRIPTION OF THE PROBLEM :
The xalan engine of the vm (com.sun.org.apache.xalan.internal.xsltc.trax.TransformerFactoryImpl class) can't compile a stylesheet that defines a xml attribute that uses the " xsl:concat " fonction having a string type parameter that contain the { character.

Not supported:
<xsl:template match= " / " >
<images dir= " {concat('{dummy}/',@subdir)} " />
</xsl:template>

When you replace '{dummy}' by 'dummy}' it's Ok

The not supported syntax is supported by Xalan 2.7.1 and msxml


STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
Use the Xalan JRE engine to transform a valid xml with the steelshit below (I have create for the test a class that use the " _main " method of the com.sun.org.apache.xalan.internal.xslt.Process class)

<?xml version= " 1.0 " encoding= " UTF-8 " standalone= " no " ?>
<xsl:stylesheet version= " 1.0 "
xmlns:xsl= " http://www.w3.org/1999/XSL/Transform "
xmlns:var= " http://www.w3.org/TR/xhtml1/strict "
exclude-result-prefixes= " var " >

<xsl:output method= " xml " indent= " yes " omit-xml-declaration= " no " encoding= " UTF-8 " />

<xsl:template match= " / " >
<images dir= " {concat('{dummy}/',@subdir)} " />
</xsl:template>

</xsl:stylesheet>


EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
Something like that (depend of the XML)
<?xml version= " 1.0 " encoding= " UTF-8 " ?><images dir= " {dummy}/ " />
ACTUAL -
The error bellow

ERROR MESSAGES/STACK TRACES THAT OCCUR :
javax.xml.transform.TransformerConfigurationException: Impossible de compiler la feuille de style
at com.sun.org.apache.xalan.internal.xsltc.trax.TransformerFactoryImpl.newTemplates(Unknown Source)
at com.sun.org.apache.xalan.internal.xslt.Process._main(Unknown Source)
at xslt.XalanJreProcess.main(XalanJreProcess.java:8)


REPRODUCIBILITY :
This bug can be reproduced always.