cli6rc6 vendor.js duplicate some rxjs functions

Versions

Angular CLI: 6.0.0-rc.6
Node: 10.0.0
OS: win32 x64
Angular: 6.0.0-rc.5
... common, compiler, compiler-cli, core, forms, http
... language-service, platform-browser, platform-browser-dynamic
... router

Package                           Version
-----------------------------------------------------------
@angular-devkit/architect         0.5.8
@angular-devkit/build-angular     0.5.9
@angular-devkit/build-optimizer   0.5.9
@angular-devkit/core              0.5.8
@angular-devkit/schematics        0.5.8
@angular/cli                      6.0.0-rc.6
@ngtools/json-schema              1.1.0
@ngtools/webpack                  6.0.0-rc.7
@schematics/angular               0.5.8
@schematics/update                0.5.8
rxjs                              6.0.0
typescript                        2.7.2
webpack                           4.6.0

Repro steps

build with :

"optimization": true,
"outputHashing": "none",
"sourceMap": true,
"extractCss": true,
 "namedChunks": false,
"aot": true,
"extractLicenses": true,
"vendorChunk": true,
"buildOptimizer": true

Run source-map-explorer ./dist/de/vendor.js

Observed behavior

Desired behavior

Don’t duplicate rxjs stuffs in vendor.js

[filipesilva]

You might have different versions of rxjs used by libraries. If that’s the case, then the correct behavior is to have duplicates.

For instance, if your app depends on rxjs 6 and a library depends on rxjs 5, then your bundle should have both because they are different.

You can check this using npm list rxjs.

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