I run Wireshark 4.1.0 with my plugin
dissector. It runs well, dissects packets, reports issues, and
behaves as expected. I can load a capture file, that has
packets of my protocol, exit Wireshark, and get no output to
the command line. I can load another capture file, that has
packets of my protocol, and get many many errors like:
** (wireshark:nnnnn) hh:mm:ss.fffffff [GLib
CRITICAL] -- g_string_free: assertion 'string != NULL'
failed
where:
- nnnnn is
always the same number within a single run of Wireshark, and
changes from run to run.
- The
timestamps can be 0.01 to 0.03 seconds apart and give me
more than 60 in a second.
- The list is
output whenever I run a display filter or clear the display
filter.
- The list
seems to be the same size whether the filter returns all
packets, or some, or even two.
Maybe it is getting this error in my
dissector or in another one. Is the error saying that it is
trying to free a non-null string that has already been freed?
In any event, are there any recommendations
for trying to locate this error?
You can try running wireshark in a debugger with
--log-fatal=critical to get a backtrace.
I am using the Visual Studio 2022 IDE.
Thank you,
Jay Turner
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