=== tests/cases/compiler/indexer3.ts ===
var dateMap: { [x: string]: Date; } = {}
>dateMap : Symbol(dateMap, Decl(indexer3.ts, 0, 3))
>x : Symbol(x, Decl(indexer3.ts, 0, 16))
>Date : Symbol(Date, Decl(lib.d.ts, 633, 23), Decl(lib.d.ts, 815, 11))

var r: Date = dateMap["hello"] // result type includes indexer using BCT
>r : Symbol(r, Decl(indexer3.ts, 1, 3))
>Date : Symbol(Date, Decl(lib.d.ts, 633, 23), Decl(lib.d.ts, 815, 11))
>dateMap : Symbol(dateMap, Decl(indexer3.ts, 0, 3))