modem-manager crashed with SIGSEGV in g_slice_alloc() - REGRESSION: WWAN/mobile broadband does not work any more in Raring

[Till Kamppeter]

Crash report appeared after trying to connect to the internet via mobile broadband on my Lenovo Thinkpad Twist. I can access without problems when booting this computer with a Quantal (12.10) live CD. As I tried more than once and got the crash report only one time there can be more things broken than only this crash.

ProblemType: Crash
DistroRelease: Ubuntu 13.04
Package: modemmanager 0.6.0.0.really-0ubuntu3
ProcVersionSignature: Ubuntu 3.8.0-15.25-generic 3.8.4
Uname: Linux 3.8.0-15-generic x86_64
ApportVersion: 2.9.2-0ubuntu5
Architecture: amd64
Date: Mon Apr 1 12:00:09 2013
ExecutablePath: /usr/sbin/modem-manager
InstallationDate: Installed on 2013-03-28 (4 days ago)
InstallationMedia: Ubuntu 13.04 "Raring Ringtail" - Alpha amd64 (20130328)
MarkForUpload: True
ProcCmdline: /usr/sbin/modem-manager
ProcEnviron:
 PATH=(custom, no user)
 TERM=linux
SegvAnalysis:
 Segfault happened at: 0x7f1d2e3b4f7f <g_slice_alloc+223>: mov (%rbx),%rax
 PC (0x7f1d2e3b4f7f) ok
 source "(%rbx)" (0x100000001) not located in a known VMA region (needed readable region)!
 destination "%rax" ok
SegvReason: reading unknown VMA
Signal: 11
SourcePackage: modemmanager
StacktraceTop:
 g_slice_alloc () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
 g_slice_alloc0 () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
 mm_callback_info_new_full ()
 ?? ()
 ?? ()
Title: modem-manager crashed with SIGSEGV in g_slice_alloc()
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: