TypeError: Cannot read property 'charCodeAt' of undefined @ isLateBoundName

[idoros]

TypeScript Version: 3.3.2 (tried latest next and issue still existed)

Search Terms:
charCodeAt, isLateBoundName

Code

export interface A { type: 'a' }
export interface B { type: 'b' }
export type AB = A | B

const itemId = 'some-id'

// --- test on first level ---
const items: { [id: string]: AB } = {}
const { [itemId]: itemOk1 } = items
typeof itemOk1 // pass

// --- test on second level ---
interface ObjWithItems {
    items: {[s: string]: AB}
}
const objWithItems: ObjWithItems = { items: {}}

const itemOk2 = objWithItems.items[itemId]
typeof itemOk2 // pass

const {
    items: { [itemId]: itemWithTSError } = {} /*happens when default value is provided*/
} = objWithItems

// in order to re-produce the error, uncomment next line:
// typeof itemWithTSError // :(

// will result in:
// Error from compilation: TypeError: Cannot read property 'charCodeAt' of undefined  TypeError: Cannot read property 'charCodeAt' of undefined

Expected behavior:
No crash.

Actual behavior:
Crashes with TypeError mid-compilation:

TypeError: Cannot read property 'charCodeAt' of undefined
    at isLateBoundName (...\typescript.js:36537:25)
    at createUnionOrIntersectionProperty (...\typescript.js:37624:42)
    at getUnionOrIntersectionProperty (...\typescript.js:37690:28)
    at getPropertyOfUnionOrIntersectionType (...\typescript.js:37698:28)
    at getPropertyOfType (...\typescript.js:37731:24)
    at getTypeOfPropertyOfType (...\typescript.js:35017:24)
    at getTypeOfDestructuredProperty (...\typescript.js:44548:45)
    at getInitialTypeOfBindingElement (...\typescript.js:44613:17)
    at getInitialType (...\typescript.js:44641:17)
    at getInitialOrAssignedType (...\typescript.js:44645:17)

Playground Link:
https://www.typescriptlang.org/play/#src=export%20interface%20A%20%7B%20type%3A%20'a'%20%7D%0D%0Aexport%20interface%20B%20%7B%20type%3A%20'b'%20%7D%0D%0Aexport%20type%20AB%20%3D%20A%20%7C%20B%0D%0A%0D%0Aconst%20itemId%20%3D%20'some-id'%0D%0A%0D%0A%2F%2F%20---%20test%20on%20first%20level%20---%0D%0Aconst%20items%3A%20%7B%20%5Bid%3A%20string%5D%3A%20AB%20%7D%20%3D%20%7B%7D%0D%0Aconst%20%7B%20%5BitemId%5D%3A%20itemOk1%20%7D%20%3D%20items%0D%0Atypeof%20itemOk1%20%2F%2F%20pass%0D%0A%0D%0A%2F%2F%20---%20test%20on%20second%20level%20---%0D%0Ainterface%20ObjWithItems%20%7B%0D%0A%20%20%20%20items%3A%20%7B%5Bs%3A%20string%5D%3A%20AB%7D%0D%0A%7D%0D%0Aconst%20objWithItems%3A%20ObjWithItems%20%3D%20%7B%20items%3A%20%7B%7D%7D%0D%0A%0D%0Aconst%20itemOk2%20%3D%20objWithItems.items%5BitemId%5D%0D%0Atypeof%20itemOk2%20%2F%2F%20pass%0D%0A%0D%0Aconst%20%7B%0D%0A%20%20%20%20items%3A%20%7B%20%5BitemId%5D%3A%20itemWithTSError%20%7D%20%3D%20%7B%7D%20%2F*happens%20when%20default%20value%20is%20provided*%2F%0D%0A%7D%20%3D%20objWithItems%0D%0A%0D%0A%2F%2F%20in%20order%20to%20re-produce%20the%20error%2C%20uncomment%20next%20line%3A%0D%0A%2F%2F%20typeof%20itemWithTSError%20%2F%2F%20%3A(%0D%0A%0D%0A%2F%2F%20will%20result%20in%3A%0D%0A%2F%2F%20Error%20from%20compilation%3A%20TypeError%3A%20Cannot%20read%20property%20'charCodeAt'%20of%20undefined%20%20TypeError%3A%20Cannot%20read%20property%20'charCodeAt'%20of%20undefined

Related Issues:
Looks similar to #26321