Semantic diagnostics do not report error in deep import when the import is through declaration file #27973
Description
From @asvetliakov as part of #27853 (comment)
observed another bug while running just tsc -w for project b. Although -w the watcher seems to pick up the changes in a10.d.ts it doesn't recalculate errors, only if export const a10 has been changed to export const a1 (which overlaps with other definition): http://recordit.co/BNBU7Ms1m3