The compilation has terminated with an unexpected error.

[Zamiell]

Zamiell@computer js % npx tscc --debug
TSCC: TypeError: Cannot read property 'map' of undefined
    at transformBundle (/Users/Zamiell/Repositories/hanabi-live/public/js/node_modules/@tscc/tscc/node_modules/typescript/lib/typescript.js:70027:53)
    at transformSourceFileOrBundle (/Users/Zamiell/Repositories/hanabi-live/public/js/node_modules/@tscc/tscc/node_modules/typescript/lib/typescript.js:70022:24)
    at transformation (/Users/Zamiell/Repositories/hanabi-live/public/js/node_modules/@tscc/tscc/node_modules/typescript/lib/typescript.js:85827:24)
    at transformRoot (/Users/Zamiell/Repositories/hanabi-live/public/js/node_modules/@tscc/tscc/node_modules/typescript/lib/typescript.js:85847:82)
    at Object.map (/Users/Zamiell/Repositories/hanabi-live/public/js/node_modules/@tscc/tscc/node_modules/typescript/lib/typescript.js:507:29)
    at Object.transformNodes (/Users/Zamiell/Repositories/hanabi-live/public/js/node_modules/@tscc/tscc/node_modules/typescript/lib/typescript.js:85834:30)
    at emitJsFileOrBundle (/Users/Zamiell/Repositories/hanabi-live/public/js/node_modules/@tscc/tscc/node_modules/typescript/lib/typescript.js:86340:32)
    at emitSourceFileOrBundle (/Users/Zamiell/Repositories/hanabi-live/public/js/node_modules/@tscc/tscc/node_modules/typescript/lib/typescript.js:86293:13)
    at forEachEmittedFile (/Users/Zamiell/Repositories/hanabi-live/public/js/node_modules/@tscc/tscc/node_modules/typescript/lib/typescript.js:86073:34)
    at Object.emitFiles (/Users/Zamiell/Repositories/hanabi-live/public/js/node_modules/@tscc/tscc/node_modules/typescript/lib/typescript.js:86274:9)

For reference, the error happens at the following code, e.g. typescript.js:70027:

        function transformBundle(node) {
            return ts.createBundle(node.sourceFiles.map(transformSourceFile), ts.mapDefined(node.prepends, function (prepend) {
                if (prepend.kind === 288 /* InputFiles */) {
                    return ts.createUnparsedSourceFile(prepend, "js");
                }
                return prepend;
            }));
        }

My tsconfig:

{
    "compilerOptions": {
        "downlevelIteration": true,
        "importHelpers": true, // Not necessary since TSCC forces it, but oh well
        "module": "commonjs", // Not necessary since TSCC forces it, but oh well
    },

    "include": [
        "./src/**/*.ts",
    ],
}

My tscc.spec.json:

{
    "modules": {
        "out": "src/main.ts"
    }
}

1. The --debug command seems to do nothing.
2. The error message is pretty unhelpful

Any tips?

[mattrenaud]

@Zamiell Had the same issue when i ran it through npx. Installing it globally fixed it: npm i -g @tscc/tscc then running tscc instead.

[theseanl]

If npx fixes it, it could be due to typescript version mismatch. Also, as I recall the transformBundle code path should not be taken for projects fed to tsickle. If there are some files that are not 'modules', i.e. without export or import statements, try making those into modules. In any case a minimal reproduction case would be helpful.