wireshark-dev October 2010 archive
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wireshark-dev: Re: [Wireshark-dev] Unable to run wireshark, tsha

Re: [Wireshark-dev] Unable to run wireshark, tshark or dumpcap from the build directory.

From: Stephen Fisher <steve_at_nospam>
Date: Sun Oct 03 2010 - 00:30:03 GMT
To: Developer support list for Wireshark <wireshark-dev@wireshark.org>

On Sat, Oct 02, 2010 at 07:39:36PM +0000, Chris Maynard wrote:

> 23145 occurrences

That's a lot!

> (process:19019): GLib-CRITICAL **: g_string_insert_c: assertion `pos
> <= string-> len' failed

The GLib source usually helps me figure out these sort of problems.
It's easiest if you have the source unpacked on the hard drive, but you
can also stumble through Git's web interface and find it:

  http://git.gnome.org/browse/glib/tree/glib/gstring.c

In this case though, all I can tell from that function is that the
position of the string to insert a character is greater than the length
of the string. What makes it harder is that Wireshark doesn't call that
function directly, so it's either something another GLib function is
calling or something else that uses GLib, such as GTK. Along the lines
of what Jaap was saying with using a debugger. When it gets really
complicated, I've had to build GLib myself with the debug symbols
configure option and then install that so the symbols show up in gdb
just like the ones from Wireshark.

> I've been seeing these errors for a long time now on this system
> (which is why it was still running 1.0.5), but I hadn't dug deep
> enough yet to try to figure out why and how to eliminate them. Any
> ideas on tracking this one down too would be greatly appreciated. Is
> it possibly a glib version problem? This system is running with
> glib2-2.12.3-2.fc6.

It could be and Wireshark only checks GLib versions when it's compiled,
so if you upgrade GLib, Wireshark won't know.

> I can't seem to find where the minimum glib version requirement for
> wireshark is mentioned.

GLib 2.4 is the minimum required as found in configure.in:

        AM_PATH_GLIB_2_0(2.4.0 ...

Although sometimes we make mistakes and don't realize that a function
isn't available as early as 2.4 and since we're running a newer version,
don't realize the problem.

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