bug

[unicomp21]

Just finished trying to run on babylonjs
https://github.com/BabylonJS/Babylon.js/tree/master/dist

Johns-MacBook-Pro:dist johndavis$ dart_js_facade_gen --destination=../../tmp --base_path=. babylon.d.ts babylon.module.d.ts
Transpiling [ 'babylon.d.ts', 'babylon.module.d.ts' ] to ../../tmp
Output file: ../../tmp/babylon.dart
Output file: ../../tmp/babylon.module.dart
/usr/local/lib/node_modules/dart_js_facade_gen/index.js:11
if (e.name !== 'DartFacadeError') throw e;
^

Error: Debug Failure. False expression: start must be non-negative, is undefined
at Object.assert (/usr/local/lib/node_modules/dart_js_facade_gen/node_modules/typescript/lib/typescript.js:1720:23)
at Object.createFileDiagnostic (/usr/local/lib/node_modules/dart_js_facade_gen/node_modules/typescript/lib/typescript.js:1279:15)
at Object.createDiagnosticForNode (/usr/local/lib/node_modules/dart_js_facade_gen/node_modules/typescript/lib/typescript.js:5026:19)
at grammarErrorOnNode (/usr/local/lib/node_modules/dart_js_facade_gen/node_modules/typescript/lib/typescript.js:31282:36)
at checkGrammarModifiers (/usr/local/lib/node_modules/dart_js_facade_gen/node_modules/typescript/lib/typescript.js:30475:32)
at checkPropertyDeclaration (/usr/local/lib/node_modules/dart_js_facade_gen/node_modules/typescript/lib/typescript.js:26482:45)
at checkSourceElement (/usr/local/lib/node_modules/dart_js_facade_gen/node_modules/typescript/lib/typescript.js:29363:28)
at Object.forEach (/usr/local/lib/node_modules/dart_js_facade_gen/node_modules/typescript/lib/typescript.js:934:30)
at checkInterfaceDeclaration (/usr/local/lib/node_modules/dart_js_facade_gen/node_modules/typescript/lib/typescript.js:28660:16)
at checkSourceElement (/usr/local/lib/node_modules/dart_js_facade_gen/node_modules/typescript/lib/typescript.js:29439:28)
Johns-MacBook-Pro:dist johndavis$