Re: [Discuss-gnuradio] Problem feeding garbage to GNU Radio

[Eric Blossom]

On Fri, Oct 10, 2008 at 02:59:33PM -0400, Philip Balister wrote:
> I'm working on a flow graph that reads samples from a file and feeds
> them to the wfm demod block. I managed to get this working, but along
> the way I ran across a problem ....
> 
> My data file is 16bit complex shorts in big-endian format. It looks
> like the file source block reads data from the file and sends it to
> the fm demod which is expecting a complex float data. I attempted a
> quick test by using the original data file (wrong format) which caused
> the flow graph to crash with a seg fault. After converting the data to
> a complex float representation the flowgraph works.
> 
> Do people view this as a problem? It seems like the file source block
> should attempt  some form of sanity checking on incoming data. If you
> aren't expecting a problem, I could see this being hard for people new
> to GNU Radio to debug.
> 
> Philip

It shouldn't segfault regardless of the input.

Can you send or post a link to the flow graph and the test data that
reproduces the problem?

A gdb stack trace would let us know where it's blowing up.
>From there the bug should be easy to find and fix.

Eric