Jeff Long

Not totally related to this issue, but throwing it out there ... When a block is used in a hier block, there will be only one downstream block. In-place operations...

@ncorgan I don't think there's any non-block work required for your idea (need to read all the blocks to know for sure). My comment was additional idea.

@ncorgan Yah, there is a bunch of util stuff in python that would take some effort to port, and python versions would have to remain for backward compatibility. Could start...

Backport note: `for_each` is C++-17. And `max_element`, ... Let's make a decision up front whether this will be backported to 3.9 or be a 3.10 thing.

Definitely more work to backport. Up to @ncorgan whether it's worth it. The biggest risk is probably that we don't know what functions people are using in the Python files....

F39 CI is failing possibly due to the gr-fft portion of this fix. Hold backport until we figure it out.

Backport: add #7181

`Message Debug` takes a PMT and assumes the `meta` portion contains a string suitable for use in `pmt::write_string` (`std::ostringstream.str()`) and then `fmt::print`. It would make sense for the block to...

fll_band_edge_cc fails on Debian 11

@marcusmueller any clue on the failure? It's a comparison that's not even close ... not a tolerance thing.