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{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"Assert emitting declarations for a global exported using an export specifier","articleBody":"Reported by @mprobst in #3514\n\nmimial repro:\n\n`a.d.ts`:\n\n``` ts\ndeclare class X {}\n```\n\n`b.ts`:\n\n```\n/// \u003creference path=\"a.d.ts\"/>\nexport {X};\nexport function f () {\n    var x: X;\n    return x;\n}\n```\n\n> tsc --d b.ts\n\nDebug Failure. False expression: isDeclarationVisible unknown: SyntaxKind: 218\n    at Object.assert (/Users/martinprobst/src/angular/node_modules/typescript/bin/typescript.js:1418:23)\n    at Object.fail (/Users/martinprobst/src/angular/node_modules/typescript/bin/typescript.js:1423:19)\n    at determineIfDeclarationIsVisible (/Users/martinprobst/src/angular/node_modules/typescript/bin/typescript.js:12614:34)\n    at isDeclarationVisible (/Users/martinprobst/src/angular/node_modules/typescript/bin/typescript.js:12620:41)\n    at getIsDeclarationVisible (/Users/martinprobst/src/angular/node_modules/typescript/bin/typescript.js:11969:22)\n    at /Users/martinprobst/src/angular/node_modules/typescript/bin/typescript.js:11964:82\n    at Object.forEach (/Users/martinprobst/src/angular/node_modules/typescript/bin/typescript.js:748:30)\n    at hasVisibleDeclarations (/Users/martinprobst/src/angular/node_modules/typescript/bin/typescript.js:11964:20)\n    at Object.isSymbolAccessible (/Users/martinprobst/src/angular/node_modules/typescript/bin/typescript.js:11904:57)\n    at Object.trackSymbol (/Users/martinprobst/src/angular/node_modules/typescript/bin/typescript.js:23053:53)\n","author":{"url":"https://github.com/mhegazy","@type":"Person","name":"mhegazy"},"datePublished":"2015-06-26T00:43:16Z","url":"https://github.com/microsoft/TypeScript/issues/3640"}