`--argfile` with command substitution is broken

[pisto]

Version: 2.11.1

Command substitution is very handy to combine multiple documents:

[pisto@kp ~]$ jq -n --argfile a <(echo '{"a":"hello"}') --argfile b <(echo '{"b":"world"}') '$a + $b'
{
  "a": "hello",
  "b": "world"
}

but it does not work in yq:

[pisto@kp ~]$ echo | yq -n --argfile a <(echo '{"a":"hello"}') --argfile b <(echo '{"b":"world"}') '$a + $b'
jq: Bad JSON in --argfile a /dev/fd/63: Could not open /dev/fd/63: No such file or directory

This is due to the fact that yq spawns another process, and there file descriptor 63 appears to be invalid. It appears that the fd is being FD_CLOEXEC'd, but I cannot tell why.

[kislyuk]

This is fixed in yq v2.12.1, thanks for reporting.