libnb-svnclientadapter-java version 6.7-0ubuntu1 failed to build with openjdk-7

During a rebuild test on precise with default-jdk switched to openjdk-7, a build failure was detected for libnb-svnclientadapter-java version 6.7-0ubuntu1.

See attached log for full build failure details.

This log snippet might also be of interest:

    [javac] * @author C???dric Chabanois (cchabanois at no-log.org)
    [javac] ^
    [javac] /«PKGBUILDDIR»/src/javahl/org/tigris/subversion/svnclientadapter/javahl/JhlClientAdapter.java:33: warning: unmappable character for encoding ASCII
    [javac] * @author C???dric Chabanois (cchabanois at no-log.org)
    [javac] ^
    [javac] /«PKGBUILDDIR»/src/javahl/org/tigris/subversion/svnclientadapter/javahl/JhlInfo.java:38: warning: unmappable character for encoding ASCII
    [javac] * @author C?dric Chabanois
    [javac] ^
    [javac] /«PKGBUILDDIR»/src/javahl/org/tigris/subversion/svnclientadapter/javahl/JhlInfo2.java:38: warning: unmappable character for encoding ASCII
    [javac] * @author C?dric Chabanois
    [javac] ^
    [javac] Note: /«PKGBUILDDIR»/src/javahl/org/tigris/subversion/svnclientadapter/javahl/AbstractJhlClientAdapter.java uses or overrides a deprecated API.
    [javac] Note: Recompile with -Xlint:deprecation for details.
    [javac] 5 warnings
     [copy] Copying 1 file to /«PKGBUILDDIR»/build/classes/main

svnClientAdapter.jar:
    [mkdir] Created dir: /«PKGBUILDDIR»/build/lib
      [jar] Building jar: /«PKGBUILDDIR»/build/lib/svnClientAdapter.jar

BUILD SUCCESSFUL
Total time: 9 seconds
touch debian/stamp-ant-build
DEB_ANT_CHECK_TARGET unset, not running checks
 fakeroot debian/rules binary
/usr/share/cdbs/1/rules/simple-patchsys.mk:31: WARNING: simple-patchsys.mk is deprecated - please use source format 3.0 (quilt) instead
test -x debian/rules
dh_testroot
dh_clean -k
dh_clean: dh_clean -k is deprecated; use dh_prep instead
dh_installdirs -A
mkdir -p "."
DEB_ANT_CHECK_TARGET unset, not running checks
DEB_ANT_INSTALL_TARGET unset, skipping default ant.mk common-install target
Adding cdbs dependencies to debian/libnb-svnclientadapter-java.substvars
dh_installdirs -plibnb-svnclientadapter-java
install -m 644 -D ./build/lib/svnClientAdapter.jar ./debian/libnb-svnclientadapter-java/usr/share/java/svnClientAdapter-6.7.jar
dh_link -plibnb-svnclientadapter-java usr/share/java/svnClientAdapter-6.7.jar usr/share/java/svnClientAdapter.jar
Adding cdbs dependencies to debian/libnb-svnclientadapter-java-doc.substvars
dh_installdirs -plibnb-svnclientadapter-java-doc
dh_install -plibnb-svnclientadapter-java-doc ./build/javadoc/* usr/share/doc/libnb-svnclientadapter-java-doc/api
dh_install: libnb-svnclientadapter-java-doc missing files (./build/javadoc/*), aborting
make: *** [install/libnb-svnclientadapter-java-doc] Error 255
dpkg-buildpackage: error: fakeroot debian/rules binary gave error exit status 2
────────────────────────────────────────────────────────────────────────────────
Build finished at 20111110-1334

Finished
────────

E: Build failure (dpkg-buildpackage died)