I can't reproduce the problem (I don't have such a setup), but it would very much help, if you'd get another backtrace with libglib2.0-0-dbg, libc6-dbg installed and please run the following steps before:
sudo apt-get build-dep libsoup export DEB_BUILD_OPTIONS="nostrip noopt" sudo apt-get source -b libsoup sudo dpkg -i libsoup*.deb
I can't reproduce the problem (I don't have such a setup), but it would very much help, if you'd get another backtrace with libglib2.0-0-dbg, libc6-dbg installed and please run the following steps before:
sudo apt-get build-dep libsoup OPTIONS= "nostrip noopt"
export DEB_BUILD_
sudo apt-get source -b libsoup
sudo dpkg -i libsoup*.deb