[ric-oliv]

With Debug = true, the SDK now warns when the app removed the logger providers that UseSentry added, for example with ClearProviders(), and didn't add them back with builder.Logging.AddSentry(). Until now LogError calls silently stopped reaching Sentry.

The generic host checks during Build(), in the hook from #5772, so it also covers hosts that are never started. ASP.NET Core and Google Cloud Functions check in app.UseSentry() at startup. With both UseSentry calls, only ASP.NET Core checks.

The check reads the service collection first and stops if the host's providers are still there, so apps that replace the logger factory, as AddSerilog() does, get no providers created. Otherwise it looks for any Sentry logger provider, which covers Logging.AddSentry() after the clear.

Limitations:

• The warning only shows with Debug = true, so NLog, Serilog and log4net apps that clear on purpose don't see it by default.
• In ASP.NET Core it goes through the app's own ILogger, so an app with no providers left won't see it.
• MAUI and Blazor WebAssembly have no check.
• On the legacy WebHostBuilder, a clear inside Startup.ConfigureServices isn't detected, because that builder copies the service collection first.

Stacked on #5776.

Refs #5755

[codecov]

Codecov Report

❌ Patch coverage is 93.33333% with 1 line in your changes missing coverage. Please review.
✅ Project coverage is 76.22%. Comparing base (49f5090) to head (f90cb35).

Files with missing lines	Patch %	Lines
...c/Sentry.Extensions.Logging/HostLoggerProviders.cs	90.00%	0 Missing and 1 partial ⚠️

Additional details and impacted files

@@                             Coverage Diff                             @@
##           fix/logging-addsentry-after-clearproviders    #5789   +/-   ##
===========================================================================
  Coverage                                       76.22%   76.22%           
===========================================================================
  Files                                             528      528           
  Lines                                           19307    19318   +11     
  Branches                                         3734     3737    +3     
===========================================================================
+ Hits                                            14716    14725    +9     
  Misses                                           3734     3734           
- Partials                                          857      859    +2     

☔ View full report in Codecov by Harness.
📢 Have feedback on the report? Share it here.

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.