"'x' was also declared here. and here." repeats same location

TypeScript Version: 3.1.0-dev.20180921

Code

// @Filename: /dir/a.ts
export const x = 0;

// @Filename: /dir/b.ts
export {};

declare module "./a" {
    export const x = 0;
}

declare module "../dir/a" {
    export const x = 0;
}

Expected behavior:

Error message mentions two different locations.

Actual behavior:

Mentions the same location twice.

!!! error TS2451: Cannot redeclare block-scoped variable 'x'.
!!! related TS6203 /dir/b.ts:4:18: 'x' was also declared here.
!!! related TS6204 /dir/b.ts:4:18: and here.