v6rc3 allowOutsideOutDir and differents assets[] config for serve and build #10284

Versions

Angular CLI: 6.0.0-rc.3
Node: 8.11.1
OS: win32 x64
Angular: 6.0.0-rc.3
... animations, cli, common, compiler, compiler-cli, core, forms
... http, language-service, platform-browser
... platform-browser-dynamic, router

@angular/cdk: 6.0.0-rc.1
@angular/material: 6.0.0-rc.1
@angular-devkit/architect: 0.5.5
@angular-devkit/build-angular: 0.5.5
@angular-devkit/build-optimizer: 0.5.5
@angular-devkit/core: 0.5.5
@angular-devkit/schematics: 0.5.5
@ngtools/json-schema: 1.1.0
@ngtools/webpack: 6.0.0-rc.3
@schematics/angular: 0.5.5
@schematics/update: 0.5.5
typescript: 2.7.2
webpack: 4.5.0

Observed behavior

my option in old angular-cli.json file on assets[] "allowOutsideOutDir":true not working

In old file I had two apps with different assets configuration and for ng serve I select appA and for ng build I select appB

this is my new angular.json I tried to add two different assets configuration in in my projects.iii.architect{} build and serve:
https://gist.github.com/istiti/5ce4aa0ac45d0be06c79f417b59a6281

I get:

What is problem ? thanks

ps: my old config https://gist.github.com/istiti/d702f613bd4ec4cb71f5ea131cbd579a

and I was running them using :
node --max-old-space-size=8192 ./node_modules/@angular/cli/bin/ng build --prod --app=prod --output-path dist/fr --locale fr --bh /fr/ --i18n-format xtb --i18n-file src/locale/fr.xtb