Using get/set members for DefineMap wildcard properties leads to a reproducible uncaught TypeError

[rjgotten]

How often can you reproduce it?

• Always
• Sometimes
• Rarely
• Unable
• I didn’t try

Description:
Creating a DefineMap subclass with wildcard properties that use get/set definitions and then attempting to read any wildcard properties after setting them results in a thrown error that seems to indicate this._computed is not set up properly for wildcard instance properties.

Steps to reproduce:

JSBin

import { DefineMap } from "//unpkg.com/[email protected]/everything.mjs";

const WildcardMap = DefineMap.extend( "WildcardMap", { seal : false }, {
  "*" : {
    get( lastSet ) { return lastSet; },
    set( value, setValue ) { setValue( value ); }
  }
});

let map = new WildcardMap();
map.set( "foo", "bar" );

console.log(map.foo);

Expected results:
Console logs "bar"

Actual results:
Console reports thrown error:

Uncaught TypeError: Cannot read property 'compute' of undefined
    at WildcardMap.get WildcardMap{}.foo (everything.mjs:9608)

Environment:

Software	Version
can-define version	2.8.0
Browser	Any
Operating system	Any