cadabra version 1.26-3 failed to build on i386

cadabra version 1.26-3 failed to build on i386
Link to failed build: https://launchpad.net/ubuntu/+archive/test-rebuild-20110413/+buildjob/2446864

Direct link to the build log: https://launchpad.net/ubuntu/+archive/test-rebuild-20110413/+buildjob/2446864/+files/buildlog_ubuntu-natty-i386.cadabra_1.26-3_FAILEDTOBUILD.txt.gz

This log snippet might be of interest, since it triggered the matcher 'Purging chroot-autobuild'.
Excerpt 1478 lines into the build log:

  do g++ -g -O2 -Wall -I. -I../src `pkg-config modglue --cflags` -E -MM -MT `echo $i | sed -e 's/\.\///' -e 's/\.cc/\.o/'` -g -O2 $i >> .depend; \
  done
make[2]: Leaving directory `/build/buildd/cadabra-1.26/src'
make[2]: Entering directory `/build/buildd/cadabra-1.26/src'
g++ -g -O2 -Wall -I. -I../src `pkg-config modglue --cflags` -D"RELEASE=\"1.26\"" -D"DATETIME=\"`date | sed -e 's/ / /'`\"" -DHOSTNAME=\"`hostname`\" -c -o preprocessor.o preprocessor.cc
g++ -g -O2 -Wall -I. -I../src `pkg-config modglue --cflags` -D"RELEASE=\"1.26\"" -D"DATETIME=\"`date | sed -e 's/ / /'`\"" -DHOSTNAME=\"`hostname`\" -c -o storage.o storage.cc
In file included from storage.hh:40:0,
                 from storage.cc:21:
tree.hh:92:13: error: 'ptrdiff_t' does not name a type
make[2]: *** [storage.o] Error 1
make[2]: Leaving directory `/build/buildd/cadabra-1.26/src'
make[1]: *** [program] Error 2
make[1]: Leaving directory `/build/buildd/cadabra-1.26'
make: *** [build-stamp] Error 2
dpkg-buildpackage: error: debian/rules build gave error exit status 2
******************************************************************************
Build finished at 20110419-0935
FAILED [dpkg-buildpackage died]
Purging chroot-autobuild/build/buildd/cadabra-1.26