Compile error related to nullish coalescing in template #45413
Description
Which @angular/* package(s) are the source of the bug?
compiler
Is this a regression?
Yes
Description
After updating one of my projects from v13.1.x to v.13.2.x or v13.3.x the project would not compile anymore with a very generic error message.
Narrowing down the bug was thus very difficult. By successive testing of all modules in the project I was able to achieve a minimal reproduction of the bug.
The following setup crashes the app:
- nullish coalescing in template which might not be needed (The left side of this nullish coalescing operation does not include 'null' or 'undefined' in its type, therefore the '??' operator can be safely removed.)
- strictTemplates mode in angular compiler options enabled
- component using a generic extending a Record
Removing the unnecessary nullish coalescing in this case makes the project compile again.
Please provide a link to a minimal reproduction of the bug
https://github.com/elnipa/ng13.3-null-span-bug
Please provide the exception or error you saw
<e> [webpack-dev-middleware] Error: Cannot read properties of null (reading 'span')
<e> at analyzingFileEmitter (C:\.....\node_modules\@ngtools\webpack\src\ivy\plugin.js:456:23)
<e> at processTicksAndRejections (node:internal/process/task_queues:96:5)
<e> at async AngularWebpackPlugin.rebuildRequiredFiles (C:\.....\node_modules\@ngtools\webpack\src\ivy\plugin.js:281:36)
<e> at async C:\.....\node_modules\@ngtools\webpack\src\ivy\plugin.js:222:17
Please provide the environment you discovered this bug in (run ng version)
Angular CLI: 13.3.0
Node: 16.13.0
Package Manager: npm 8.1.0
OS: win32 x64
Angular: 13.3.0
... animations, cli, common, compiler, compiler-cli, core, forms
... platform-browser, platform-browser-dynamic, router
Package Version
---------------------------------------------------------
@angular-devkit/architect 0.1303.0
@angular-devkit/build-angular 13.3.0
@angular-devkit/core 13.3.0
@angular-devkit/schematics 13.3.0
@schematics/angular 13.3.0
rxjs 7.5.5
typescript 4.6.2
Anything else?
No response