libtinymail version 0.0.9+svn4142-4build1 failed to build on amd64 with GCC-4.6/oneiric

libtinymail version 0.0.9+svn4142-4build1 failed to build on amd64 with GCC-4.6/oneiric
Link to failed build: https://launchpad.net/ubuntu/+archive/test-rebuild-20110413/+buildjob/2460356

Details about the rebuild:
https://lists.ubuntu.com/archives/ubuntu-devel/2011-April/033042.html

Direct link to the build log: https://launchpad.net/ubuntu/+archive/test-rebuild-20110413/+buildjob/2460356/+files/buildlog_ubuntu-natty-amd64.libtinymail_0.0.9%2Bsvn4142-4build1_FAILEDTOBUILD.txt.gz

This log snippet might be of interest, since it triggered the matcher 'Purging chroot-autobuild'.
Excerpt 4338 lines into the build log:

+++ dpkg-gensymbolssjtR3f 2011-04-24 09:55:06.000000000 +0000
@@ -763,8 +763,8 @@
  camel_sasl_digest_md5_authtype@Base 0.0.9+svn4142
  camel_sasl_digest_md5_get_type@Base 0.0.9+svn4142
  camel_sasl_get_type@Base 0.0.9+svn4142
- camel_sasl_gssapi_authtype@Base 0.0.9+svn4142
- camel_sasl_gssapi_get_type@Base 0.0.9+svn4142
+#MISSING: 0.0.9+svn4142-4build1# camel_sasl_gssapi_authtype@Base 0.0.9+svn4142
+#MISSING: 0.0.9+svn4142-4build1# camel_sasl_gssapi_get_type@Base 0.0.9+svn4142
  camel_sasl_login_authtype@Base 0.0.9+svn4142
  camel_sasl_login_get_type@Base 0.0.9+svn4142
  camel_sasl_new@Base 0.0.9+svn4142
dh_makeshlibs: dpkg-gensymbols -plibtinymail-camel-1.0-0 -Idebian/libtinymail-camel-1.0-0.symbols -Pdebian/libtinymail-camel-1.0-0 returned exit code 1
make: *** [binary-arch] Error 1
dpkg-buildpackage: error: /usr/bin/fakeroot debian/rules binary-arch gave error exit status 2
******************************************************************************
Build finished at 20110424-0955
FAILED [dpkg-buildpackage died]
Purging chroot-autobuild/build/buildd/libtinymail-0.0.9+svn4142