delete.namespace does not assign to numberedArgs

[emiflake]

When using delete.namespace ucm will not assign numberedArgs which is unexpected.

It also assigns multiple things to the same number (possibly related).

Transcript showing the problem

First, lets create two namespaces. foo and bar, and add some definitions.

x = 42
y = 100

  I found and typechecked these definitions in scratch.u. If you
  do an `add` or `update`, here's how your codebase would
  change:
  
    ⍟ These new definitions are ok to `add`:
    
      x : Nat
      y : Nat

  ☝️  The namespace .foo is empty.

.foo> add

  ⍟ I've added these definitions:
  
    x : Nat
    y : Nat

z = x + y

  I found and typechecked these definitions in scratch.u. If you
  do an `add` or `update`, here's how your codebase would
  change:
  
    ⍟ These new definitions are ok to `add`:
    
      z : Nat

  ☝️  The namespace .bar is empty.

.bar> add

  ⍟ I've added these definitions:
  
    z : Nat

Let's see what we have created...

.> ls

  1. bar/     (1 definition)
  2. builtin/ (168 definitions)
  3. foo/     (2 definitions)

Now, if we try deleting the namespace foo, we get an error, as expected.

.> delete.namespace foo

  ⚠️
  
  I couldn't delete
  
    1. foo.x : builtin.Nat
    2. foo.y : builtin.Nat
    
  
  because it's still being used by these definitions:
  
    1. bar.z : builtin.Nat
    

However, the numbered arguments are not assigned by that command.

.> debug.numberedArgs

  1. .bar
  2. .builtin
  3. .foo

As you can see, the earlier output from `ls is still there.

Transcript source here:

delete-namespace-does-not-assign-numberedArgs.md.zip