Assertion Failure in gr::buffer

GNU Radio
1

All,

I am running a basic PSK Mod block in one GRC flowgraph and another
flowgraph with a basic PSK Demod.
I am using two URSP N210s, one as transmit, one as receive and GNU Radio
3.7.5, built on Ubuntu with Debugging Symbols.

If I start the PSK Mod, while the Demod flowgraph is running, I get
assertion failures.
The following is printed in the ‘top_block’ Python output window:

This early on:
(python:3210): Gtk-CRITICAL **: IA__gtk_progress_set_percentage:
assertion ‘percentage >= 0 && percentage <= 1.0’ failed

And this later on:
python:
/home/luke/gnuradio-3.7.5/gnuradio-runtime/include/gnuradio/buffer.h:170:
unsigned int gr::buffer::index_add(unsigned int, unsigned int):
Assertion `s < d_bufsize’ failed.

Which then causes (in the GDB output):
Program received signal SIGABRT, Aborted.
0xb76f4424 in __kernel_vsyscall ()

Does anyone have any idea where to start with this?
Or can anyone reproduce the same problem?

Thanks,
Luke

2

I have created two GRC files to run as examples, attached.

The issue only occurs when the Transmit file is started after the
Receive file (i.e. the Receiver is already running). And the same error
occurs in GNU Radio 3.7.3 on Windows.

Thanks,
Luke

From: discuss-gnuradio-bounces+luke.peel=removed_email_address@domain.invalid
[mailto:discuss-gnuradio-bounces+luke.peel=removed_email_address@domain.invalid]
On Behalf Of PEEL Luke
Sent: 22 September 2014 10:45
To: [email protected]
Subject: [Discuss-gnuradio] Assertion Failure in gr::buffer

All,

I am running a basic PSK Mod block in one GRC flowgraph and another
flowgraph with a basic PSK Demod.
I am using two URSP N210s, one as transmit, one as receive and GNU Radio
3.7.5, built on Ubuntu with Debugging Symbols.

If I start the PSK Mod, while the Demod flowgraph is running, I get
assertion failures.
The following is printed in the ‘top_block’ Python output window:

This early on:
(python:3210): Gtk-CRITICAL **: IA__gtk_progress_set_percentage:
assertion ‘percentage >= 0 && percentage <= 1.0’ failed

And this later on:
python:
/home/luke/gnuradio-3.7.5/gnuradio-runtime/include/gnuradio/buffer.h:170:
unsigned int gr::buffer::index_add(unsigned int, unsigned int):
Assertion `s < d_bufsize’ failed.

Which then causes (in the GDB output):
Program received signal SIGABRT, Aborted.
0xb76f4424 in __kernel_vsyscall ()

Does anyone have any idea where to start with this?
Or can anyone reproduce the same problem?

Thanks,
Luke