Fix FourSlash crash
Fix FourSlash crash

fdecampredon/jsx-typescript-old-version,mbebenita/shumway.ts,mbrowne/typescript-dci,mbebenita/shumway.ts,mbebenita/shumway.ts,mbrowne/typescript-dci,hippich/typescript,fdecampredon/jsx-typescript-old-version,hippich/typescript,popravich/typescript,popravich/typescript,popravich/typescript,mbrowne/typescript-dci,mbrowne/typescript-dci,hippich/typescript,fdecampredon/jsx-typescript-old-version