XPath tests fail on latest revision [parser=libxml2]

[enricop]

While XPath tests run successfully on the 2012 November release, they are broken in the current revison:

[sunkiss@sunfire XPath]$ make check
make xpath_test xpath_test_silly xpath_test_wide
make[1]: Entering directory /home/sunkiss/arabica-master/tests/XPath' make[1]:xpath_test' is up to date.
make[1]: xpath_test_silly' is up to date. make[1]:xpath_test_wide' is up to date.
make[1]: Leaving directory /home/sunkiss/arabica-master/tests/XPath' make check-TESTS make[1]: Entering directory/home/sunkiss/arabica-master/tests/XPath'
make[2]: Entering directory /home/sunkiss/arabica-master/tests/XPath' ../../test-driver: line 95: 8497 Segmentation fault "$@" > $log_file 2>&1 FAIL: xpath_test ../../test-driver: line 95: 8516 Segmentation fault "$@" > $log_file 2>&1 FAIL: xpath_test_silly ../../test-driver: line 95: 8535 Segmentation fault "$@" > $log_file 2>&1 FAIL: xpath_test_wide make[3]: Entering directory/home/sunkiss/arabica-master/tests/XPath'
make[3]: Nothing to be done for all'. make[3]: Leaving directory/home/sunkiss/arabica-master/tests/XPath'

Testsuite summary for Arabica 2013-Sometime

TOTAL: 3

PASS: 0

SKIP: 0

XFAIL: 0

FAIL: 3

XPASS: 0

ERROR: 0

============================================================================
See tests/XPath/test-suite.log
Please report to [email protected]

make[2]: *** [test-suite.log] Error 1
make[2]: Leaving directory /home/sunkiss/arabica-master/tests/XPath' make[1]: *** [check-TESTS] Error 2 make[1]: Leaving directory/home/sunkiss/arabica-master/tests/XPath'
make: *** [check-am] Error 2

all the generated .log files are empty