[Discuss-gnuradio] Bug in tag processing

[Eugene Grayver]

I think there's a bug in tag processing.  Here's a simple script to demonstrate the problem.  If DELAY is set to a small value <6000,  we get the expected output. However, if DELAY is set to 8000, the tag never comes out.  The same problem can be observed using the blocks.vector_insert_b block, indicating that the bug is in the runtime.

------------------------

DELAY = 8000

from gnuradio import gr, blocks

import pmt

print "Version", gr.version()

top = gr.top_block()

tag = gr.python_to_tag((0, pmt.to_pmt('A'), pmt.to_pmt(1), pmt.PMT_NIL))

src = "" tags=[tag], repeat=False)

dly = blocks.delay(gr.sizeof_short, DELAY)

snk = blocks.tag_debug(gr.sizeof_short, 'A')

top.connect(src, dly, snk)

--------------

 expected output:

Version v3.7.9.1-97-gc0381e0e

----------------------------------------------------------------------

Tag Debug: A

Input Stream: 00

  Offset: 6000  Source: n/a     Key: A   Value: 1

----------------------------------------------------------------------

________________________

Eugene Grayver, Ph.D.
Aerospace Corp., Sr. Eng. Spec.
Tel: 310.336.1274
________________________