Bash parsing of redirects on exported functions

exbug

#!/usr/bin/env bash

set -x

f() {
    echo 'hi'
} >&${1}

{ f 3; cat; } <<<'' 3>/dev/stdin

export -f f
export -pf

PS4='* ' BASH_XTRACEFD=4 bash -xc 'f 3; cat' <<<'' 3>/dev/stdin 4>&2

[[ -f 3 ]] && cat ./3

# vim: set fenc=utf-8 ff=unix ts=4 sts=4 sw=4 ft=sh nowrap et:

output

 ~ $ rm 3; ./exbug
+ f 3
+ echo hi
+ cat
hi
+ export -f f
+ export -pf
f () 
{ 
    echo 'hi'
} &>${1}
declare -fx f
* PS4='* '
* BASH_XTRACEFD=4
+ bash -xc 'f 3; cat'
* f 3
* echo hi
* cat
+ [[ -f 3 ]]
+ cat ./3
hi