1) Open Console in DevTools
2) Enter "{inner: []}"
3) Click the arrow to expand "Object {inner: Array[0]}"
4) Double click on the value "Array[0]" to enter editing mode
5) Type "{x: 5}" and press enter

What is expected?
The value of the 'inner' key should be '{x: 5}'.  Instead, DevTools just evaluates the expression as '5'.

Other examples:
Working
- Plain numbers 123
- Plain strings "abc"
- null
- undefined

Not always working
- Arrays [1,2,3]
- Objects {x: 1}
- Functions function(){}