Bug#266907: Asterisk crashes using dtmfmode=asterisk in modem.conf and i4l driver

[Alessandro Polverini]

Package: asterisk
Version: 1:0.9.1+1.0RC1-8
Severity: grave
Justification: renders package unusable

I'm using a HFC-S based ISDN card with the i4l driver.
If I enable dtmf mode detection by asterisk, during a call, at random,
asterisk crashes with Floating Point Exception.
Everything works fine if I use dtmfmode=none or dtmfmodem=i4l.

-- System Information:
Debian Release: 3.1
  APT prefers testing
  APT policy: (500, 'testing'), (50, 'unstable')
Architecture: i386 (i686)
Kernel: Linux 2.6.8-1-686
Locale: LANG=C, LC_CTYPE=C

Versions of packages asterisk depends on:
ii  asterisk-sounds       1:0.9.1+1.0RC1-8   Sound files for asterisk
ii  libasound2            1.0.5-1            Advanced Linux Sound Architecture 
ii  libc6                 2.3.2.ds1-13       GNU C Library: Shared libraries an
ii  libedit2              2.6.cvs.20020109-7 BSD editline and history libraries
ii  libexpat1             1.95.6-8           XML parsing C library - runtime li
ii  libgcc1               1:3.4.1-4sarge1    GCC support library
ii  libglib1.2            1.2.10-9           The GLib library of C routines
ii  libgsm1               1.0.10-13          Shared libraries for GSM speech co
ii  libgtk1.2             1.2.10-17          The GIMP Toolkit set of widgets fo
ii  libncurses5           5.4-4              Shared libraries for terminal hand
ii  libopenh323-1.13.2    1.13.5.4-3         H.323 aka VoIP library
ii  libpq3                7.4.3-3            Shared library libpq.so.3 for Post
ii  libpri1               0.6.0+1.0RC1-1     Primary Rate ISDN specification li
ii  libpt-1.6.3           1.6.6.4-2          Portable Windows Library
ii  libspeex1             1.0.rel.4-1        The Speex Speech Codec
ii  libssl0.9.7           0.9.7d-4           SSL shared libraries
ii  libtonezone1          1:0.8.1-1          tonezone library (runtime)
ii  libx11-6              4.3.0.dfsg.1-6     X Window System protocol client li
ii  libxext6              4.3.0.dfsg.1-6     X Window System miscellaneous exte
ii  libxi6                4.3.0.dfsg.1-6     X Window System Input extension li
ii  unixodbc              2.2.4-9            ODBC tools libraries
ii  zlib1g                1:1.2.1.1-5        compression library - runtime

-- no debconf information