strange output, [[2]] instead of [] about flux

[tcbrindle]

Hi @andrey-budko, thanks for the bug report. This is definitely a strange one!

Playing with the example, there are several interesting things:

• If we remove the chunk() adaptor, it prints an empty sequence as expected
• If we remove the filter(), we get an empty sequence
• If we remove the second reverse(), we get an empty sequence
• If we move the filter so that it's the first adaptor in the pipeline (directly after the iota), we get an empty sequence
• If we swap the filter with the second reverse, then we get an empty sequence

There's definitely a bug... somewhere... but it looks like it's only exposed with a particular combination of adaptors.

[tcbrindle]

Hi @andrey-budko, this should now be fixed: https://flux.godbolt.org/z/o47dE8qbx

Thanks for the bug report, this was a fun one to track down! If you find any more Flux issues please do file them as well