On webpack run: "TypeError: Cannot read property 'name' of undefined"

[aight8]

If transpileOnly is true it works. However this is not a permanent solution.
Webpack builds very long time and the memory of the webpack process increases over 1.5 GB, until node.js ran out of memory. I literally build just a ts file as entry point which contains console.log('abc').

ts-loader: Using /Users/aight8/my-project/node_modules/typescript@2.2.1. This version may or may not be compatible with ts-loader.
ts-loader: Using config file at /Users/aight8/my-project/tsconfig.json

/Users/aight8/my-project/node_modules/typescript/lib/typescript.js:25122
                error(source.valueDeclaration.name, ts.Diagnostics.Cannot_augment_module_0_with_value_exports_because_it_resolves_to_a_non_module_entity, symbolToString(target));
                                             ^
TypeError: Cannot read property 'name' of undefined
    at mergeSymbol (/Users/aight8/my-project/node_modules/typescript/lib/typescript.js:25122:46)
    at /Users/aight8/my-project/node_modules/typescript/lib/typescript.js:25146:21
    at Map.forEach (native)
    at mergeSymbolTable (/Users/aight8/my-project/node_modules/typescript/lib/typescript.js:25136:20)
    at mergeSymbol (/Users/aight8/my-project/node_modules/typescript/lib/typescript.js:25117:21)
    at /Users/aight8/my-project/node_modules/typescript/lib/typescript.js:25146:21
    at Map.forEach (native)
    at mergeSymbolTable (/Users/aight8/my-project/node_modules/typescript/lib/typescript.js:25136:20)
    at mergeSymbol (/Users/aight8/my-project/node_modules/typescript/lib/typescript.js:25117:21)
    at /Users/aight8/my-project/node_modules/typescript/lib/typescript.js:25146:21

Ts config is currently:

{
    "compilerOptions": {
        "noImplicitAny": false,
        "strictNullChecks": false,
        "moduleResolution": "node",
        "target": "es2017",
        "outDir": "bin",
        "sourceMap": true,
        "module": "commonjs",
        "typeRoots": [
            "node_modules/@types"
        ],
        "pretty": true
    },
    "include": [
        "src"
    ]
}

However I tested various other settings. The error stays the same.

Tested with typescript 2.2.1 and 2.3-nightly

Parallel issue in awesome-typescript-loader: s-panferov/awesome-typescript-loader#395

[johnnyreilly]

I've a feeling there are issues with typeRoots - though i forget the specifics...

[lbguilherme]

Looks like this was fixed by pull microsoft/TypeScript#15075, issue microsoft/TypeScript#14628. Will be released as TS 2.3.1 soon.

[lbguilherme]

2.3.1 was released and still contains the bug, you can use typescript@next. The fix was NOT released, but resides in master for 2.4.0. They really should release this.

[Opty1712]

Got same error. Any news?

[johnnyreilly]

Assuming 2.4 resolved it then hang tight for that. It'll be out soon

[johnnyreilly]

Oh and you could try making use of the fork-ts-checker-webpack-plugin (see our docs). It should be run with ts-loader in transpile mode and so might not be affected. Worth a try anyway (perf boost either way!)

[stale]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.

[stale]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.

[stale]

Closing as stale. Please reopen if you'd like to work on this further.