Source maps point to non existent files

Intended outcome:

Sourcemaps are detected and used correctly. Actual outcome: When building a typescript project that uses apollo with source maps, webpack produces the following outpùt:

WARNING in ./node_modules/apollo-client/util/Observable.js
Module Warning (from ./node_modules/source-map-loader/index.js):
(Emitted value instead of an instance of Error) Cannot find source file '../../src/util/Observable.ts': Error: Can't resolve '../../src/util/Observable.ts' in 'C:\Users\biel\projects\MS\Inv\invoices\invoices-app\node_modules\apollo-client\util'
 @ ./node_modules/apollo-client/core/ObservableQuery.js 21:0-48 419:2-12
 @ ./node_modules/apollo-client/index.js
 @ ./src/core/data/client.ts
 @ ./src/index.tsx
 @ multi ./src/index.tsx webpack-hot-middleware/client

WARNING in ./node_modules/apollo-client/ApolloClient.js
Module Warning (from ./node_modules/source-map-loader/index.js):
(Emitted value instead of an instance of Error) Cannot find source file '../src/ApolloClient.ts': Error: Can't resolve '../src/ApolloClient.ts' in 'C:\Users\biel\projects\MS\Inv\invoices\invoices-app\node_modules\apollo-client'
 @ ./node_modules/apollo-client/index.js 6:0-42 8:0-24 9:15-27
 @ ./src/core/data/client.ts
 @ ./src/index.tsx
 @ multi ./src/index.tsx webpack-hot-middleware/client

(and many more)

How to reproduce the issue: Download the package from npm and check that index.js.map has the following content: {"version":3,"file":"index.js","sourceRoot":"","sources":["../src/index.ts"],"names":[],"mappings":"AAAA,OAAO,EAAE,KAAK,IAAI,QAAQ,EAAE,MAAM,0BAA0B,CAAC;AAE7D,OAAO,EACL,eAAe,GAIhB,MAAM,wBAAwB,CAAC;AAahC,OAAO,EAAE,aAAa,EAAE,MAAM,sBAAsB,CAAC;AACrD,cAAc,cAAc,CAAC;AAE7B,OAAO,EAAE,WAAW,EAAE,MAAM,sBAAsB,CAAC;AAEnD,OAAO,YAAqC,MAAM,gBAAgB,CAAC;AAInE,8CAA8C;AAC9C,OAAO,EAAE,YAAY,EAAE,CAAC;AACxB,eAAe,YAAY,CAAC"} Note the ../src/index.ts which ipoints to a file that doesn’t exist. The package does not contain an src directory at all. My guess is that sourcemaps should either be self-contained or the src folder should be included to the npm package.

Versions

  System:
    OS: Windows 10
  Binaries:
    Yarn: 1.7.0 - C:\Program Files (x86)\Yarn\bin\yarn.CMD
    npm: 5.6.0 - C:\Program Files\nodejs\npm.CMD
  Browsers:
    Edge: 42.17134.1.0
  npmPackages:
    apollo-cache-inmemory: ^1.2.5 => 1.2.5
    apollo-client: ^2.3.5 => 2.3.5
    apollo-link: ^1.2.2 => 1.2.2
    apollo-link-error: ^1.1.0 => 1.1.0
    apollo-link-http: ^1.5.4 => 1.5.4
    react-apollo: ^2.1.9 => 2.1.9

[maclockard]

Source maps still point to non existent files as of @apollo/client 3.1.0

[klemenoslaj]

I have the same issues with Angular CLI, or even with a clean webpack/typescript project. Is there any plan to fix that?