Merging two variables with same indexer does not work #8178
Description
Flow version: 0.111
//@flow
type Indexed = { [string]: number };
const x: Indexed = {foo: 3};
const y: Indexed = {bar: 5}
const z: Indexed = {...x, ...y};Expected behavior
I would have expected that the assignment to z works because all indexers are the same so the new variable should also work.
Actual behavior
Cannot determine a type for object literal [1]. `Indexed` [2] cannot be spread because the indexer string [3] may overwrite properties with explicit keys in a way that Flow cannot track. Can you spread `Indexed` [2] first or remove the indexer?