Compilation error when updating to angular 9.1.5

[cedricduffournet]

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I'm submitting a ...

• bug report

• feature request

• question about the decisions made in the repository

• If the current behavior is a bug, please provide the steps to reproduce and if possible a minimal demo of the problem
  When updating angular to 9.1.5 I have the following error :

ERROR in node_modules/angulartics2/public_api.d.ts:5:54 - error TS1149: File name '/Users/noname/Sites/angulartics2-error/node_modules/angulartics2/angulartics2On.d.ts' differs from already included file name '/Users/noname/Sites/angulartics2-error/node_modules/angulartics2/angulartics2on.d.ts' only in casing.

5 export { Angulartics2On, Angulartics2OnModule } from './angulartics2On';

Exemple: https://github.com/cedricduffournet/angulartics-error

• What is the expected behavior?
  Should compile correctly

• Environment:

     _                      _                 ____ _     ___
    / \   _ __   __ _ _   _| | __ _ _ __     / ___| |   |_ _|
   / △ \ | '_ \ / _` | | | | |/ _` | '__|   | |   | |    | |
  / ___ \| | | | (_| | |_| | | (_| | |      | |___| |___ | |
 /_/   \_\_| |_|\__, |\__,_|_|\__,_|_|       \____|_____|___|
                |___/
    

Angular CLI: 9.1.4
Node: 13.11.0
OS: darwin x64

Angular: 9.1.5
... animations, common, compiler, compiler-cli, core, forms
... language-service, platform-browser, platform-browser-dynamic
... router
Ivy Workspace: Yes

Package                           Version
-----------------------------------------------------------
@angular-devkit/architect         0.901.4
@angular-devkit/build-angular     0.901.4
@angular-devkit/build-optimizer   0.901.4
@angular-devkit/build-webpack     0.901.4
@angular-devkit/core              9.1.4
@angular-devkit/schematics        9.1.4
@angular/cli                      9.1.4
@ngtools/webpack                  9.1.4
@schematics/angular               9.1.4
@schematics/update                0.901.4
rxjs                              6.5.5
typescript                        3.8.3
webpack                           4.42.0

[petebacondarwin]

This is a bug in ngcc. Working on a fix. See angular/angular#36992 (comment)

[cedricduffournet]

Thank you for the quick answer

[petebacondarwin]

I can confirm that angular/angular#37008 fixes this locally for me.