Error while parsing [_, cont] := walk(structure.spec.containers[_])

[olegroom]

Come up with a problem, where standard opa bundle . works correctly, though fregot bundle -o bun.bundle.rego */**/*.rego doesn't.
The error I receive by fregot is

fregot (fatal parse error):
"Standards/STD-OSE/v1_0_0/OSE16.rego" (line 43, column 14):
parse failed:
43| [, value] := walk(structure.spec.containers[])
^
unexpected "]"

The problem that there is no error in this construction, so I need your help in realising what's going on.

[jaspervdj-luminal]

fregot only allows variables to be assigned using := -- this seems like a bug if OPA does allow unifying lists.

Maybe using [_, value] = walk(...) helps as a workaround?