qemu-sparc64-static: Segmentation Fault during debootstrap second stage

Host: Ubuntu Precise amd64
Guest: Debian Sid (ports) sparc64

When attempting the second stage of a debootstrap for a sparc64 Debian Sid guest, a segmentation fault occurs.

$ sudo qemu-debootstrap --no-check-gpg --arch=sparc64 sid sparc64 http://ftp.debian-ports.org/debian
I: Running command: debootstrap --arch sparc64 --foreign --no-check-gpg sid sparc64 http://ftp.debian-ports.org/debian
[...]
I: Running command: chroot sparc64 /debootstrap/debootstrap --second-stage
/debootstrap/debootstrap: 22: .: Can't open /usr/share/debootstrap/functions
Segmentation fault (core dumped)

Running a simple "sudo chroot sparc64" exits silently on amd64, and reports a segfault on i386.

ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: qemu-user-static 1.0.50-2012.03-0ubuntu2.1
ProcVersionSignature: Ubuntu 3.8.0-33.48~precise1-generic 3.8.13.11
Uname: Linux 3.8.0-33-generic x86_64
NonfreeKernelModules: wl
ApportVersion: 2.0.1-0ubuntu17.6
Architecture: amd64
Date: Mon Nov 25 17:49:34 2013
Dependencies:
 
InstallationMedia: Ubuntu 12.04.3 LTS "Precise Pangolin" - Release amd64 (20130820.1)
MarkForUpload: True
ProcEnviron:
 LANGUAGE=en_GB:en
 TERM=xterm
 PATH=(custom, no user)
 LANG=en_GB.UTF-8
 SHELL=/bin/bash
SourcePackage: qemu-linaro
UpgradeStatus: No upgrade log present (probably fresh install)