```tk env list``` doesn't work with tla function

[zephyros-dev]

I have a jsonnet file like this

// environments/example/non-tla
local data = {
  namespace: {
    apiVersion: 'v1',
    kind: 'Namespace',
    metadata: {
      name: 'namespace',
    },
  },
};
local tanka = import 'github.com/grafana/jsonnet-libs/tanka-util/main.libsonnet';
{
  env: tanka.environment.new(
         name='namespace',
         namespace='namespace',
         apiserver='https://localhost:6443',
       )
       + tanka.environment.withData(data),
}

When I use tk env list with the above jsonnet file, it shows the environment normally

# tk env list environments/example/non-tla/
NAME         NAMESPACE    SERVER                    
namespace    namespace    https://localhost:6443    

But when I tried the same with a tla function, tk env list doesn't shows the environment anymore

// environments/example/tla
local data = {
  namespace: {
    apiVersion: 'v1',
    kind: 'Namespace',
    metadata: {
      name: 'namespace',
    },
  },
};
local tanka = import 'github.com/grafana/jsonnet-libs/tanka-util/main.libsonnet';
function(var='var') {
  env: tanka.environment.new(
         name='namespace',
         namespace='namespace',
         apiserver='https://localhost:6443',
       )
       + tanka.environment.withData(data),
}

# tk env list environments/example/tla/
NAME         NAMESPACE    SERVER

Both are valid jsonnet file and both render to the exact same result when I tried tk eval and tk show

[stale[bot]]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.

[zephyros-dev]

Not stale

[stale[bot]]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.

[zephyros-dev]

Not stale

[stale[bot]]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.

[zephyros-dev]

Not stale

[zerok]

Can still reproduce this with a simple inline environment that is built via function. show is able to generate the output but env list does not list the environment