bash process substitution works with 2.0.19, but not 3.1.6

[bisz]

thanks for making the awesome q and making it free.

i use bash process substitution quite often (cutting the code of writing/reading files), and it works perfectly with q 2.0.19:

$ /Users/bisz/Downloads/q-x86_64-Darwin -v
q version 2.0.19
Python: 3.7.3 (default, Sep  9 2020, 19:20:35) // [Clang 7.3.0 (clang-703.0.31)]
Copyright (C) 2012-2020 Harel Ben-Attia (harelba@gmail.com, @harelba on twitter)
http://harelba.github.io/q/

$ echo $a
1

$ /Users/bisz/Downloads/q-x86_64-Darwin 'select * from '<(echo $a)
Warning: column count is one - did you provide the correct delimiter?
1

but q 3.1.6 seems ignoring the entire data:

$ q -v
q version 3.1.6
Python: 3.8.11 (default, Jul 24 2021, 22:28:00) // [Clang 12.0.1 ]
Copyright (C) 2012-2021 Harel Ben-Attia (harelba@gmail.com, @harelba on twitter)
http://harelba.github.io/q/

$ \q 'select * from '<(echo $a)
Warning - data is empty

$ echo $a
1

$ \q 'select * from '<(echo $a)
Warning - data is empty

is it a bug, a behavior change, or somethign that i am missing?

appreciate your time.