# cat /var/tmp/portage/dev-java/ant-core-1.10.9/temp/build.log 
[32m * [39;49;00mPackage:    dev-java/ant-core-1.10.9
[32m * [39;49;00mRepository: gentoo
[32m * [39;49;00mMaintainer: java@gentoo.org
[32m * [39;49;00mUSE:        abi_x86_64 amd64 elibc_glibc kernel_linux userland_GNU
[32m * [39;49;00mFEATURES:   network-sandbox preserve-libs sandbox userpriv usersandbox
 [32m*[0m Using: icedtea-bin-8
>>> Unpacking source...
>>> Unpacking apache-ant-1.10.9-src.tar.bz2 to /var/tmp/portage/dev-java/ant-core-1.10.9/work
>>> Unpacking ant-1.10.9-gentoo.tar.bz2 to /var/tmp/portage/dev-java/ant-core-1.10.9/work
>>> Source unpacked in /var/tmp/portage/dev-java/ant-core-1.10.9/work
>>> Preparing source in /var/tmp/portage/dev-java/ant-core-1.10.9/work/apache-ant-1.10.9 ...
 [32m*[0m Applying 1.10.9-build.patch ...
[A[231C [34;01m[ [32;01mok[34;01m ][0m
 [32m*[0m Applying 1.10.9-launch.patch ...
[A[231C [34;01m[ [32;01mok[34;01m ][0m
 [32m*[0m Adjusting to prefix /
 [32m*[0m   ant ...
[A[231C [34;01m[ [32;01mok[34;01m ][0m
xml-rewrite-2.py: no python-exec wrapped executable found in /usr/lib/python-exec.
 [31;01m*[0m ERROR: dev-java/ant-core-1.10.9::gentoo failed (prepare phase):
 [31;01m*[0m   /usr/lib64/javatoolkit/bin/xml-rewrite-2.py failed
 [31;01m*[0m 
 [31;01m*[0m Call stack:
 [31;01m*[0m     ebuild.sh, line  127:  Called src_prepare
 [31;01m*[0m   environment, line 3064:  Called java-ant_xml-rewrite '-f' 'build.xml' '-c' '-e' 'javadoc' '-a' 'failonerror' '-v' 'false'
 [31;01m*[0m   environment, line 1340:  Called die
 [31;01m*[0m The specific snippet of code:
 [31;01m*[0m               ${gen2_1} "${@}" || die "${gen2_1} failed";
 [31;01m*[0m 
 [31;01m*[0m If you need support, post the output of `emerge --info '=dev-java/ant-core-1.10.9::gentoo'`,
 [31;01m*[0m the complete build log and the output of `emerge -pqv '=dev-java/ant-core-1.10.9::gentoo'`.
!!! When you file a bug report, please include the following information:
GENTOO_VM=icedtea-bin-8  CLASSPATH="" JAVA_HOME="/opt/icedtea-bin-3.16.0"
JAVACFLAGS="-source 1.8 -target 1.8" COMPILER=""
and of course, the output of emerge --info =ant-core-1.10.9
 [31;01m*[0m The complete build log is located at '/var/tmp/portage/dev-java/ant-core-1.10.9/temp/build.log'.
 [31;01m*[0m The ebuild environment file is located at '/var/tmp/portage/dev-java/ant-core-1.10.9/temp/environment'.
 [31;01m*[0m Working directory: '/var/tmp/portage/dev-java/ant-core-1.10.9/work/apache-ant-1.10.9'
 [31;01m*[0m S: '/var/tmp/portage/dev-java/ant-core-1.10.9/work/apache-ant-1.10.9'