[Bug 2122355] [NEW] [SRU] New upstream microrelease .NET 9.0.110/9.0.9

[Launchpad Bug Tracker]

You have been subscribed to a public bug by Dominik Viererbe (dviererbe):

This is the tracking bug for the .NET 9 September 2025 release.

[Impact]

 * This correspond to an upstream microrelease released on September 9th, 2025. See also:
   - .NET blog entry: TO BE PUBLISHED
   - release announcement: TO BE PUBLISHED
   - .NET 9.0.9 Runtime release notes: TO BE PUBLISHED
   - .NET 9.0.110 SDK release notes: TO BE PUBLISHED
   - .NET 9.0.9 Runtime changes: TO BE PUBLISHED

 * It is beneficial for our users to have access to the latest .NET
stack.

[Test Case]

 * The package should build successfully in -proposed (respectively).

 * The packages should be installable on plucky, questing on
   amd64, arm64, s390x and ppc64el architectures.

 * Autopackage tests should pass.

[Regression Potential]

 * The dotnet9 package has no reverse dependencies.

 * The upstream testing routine is usually satisfactory (see for example
Microsoft's public Azure Pipeline for .NET related repositories:
https://dev.azure.com/dnceng-public/public/_build), but there is always
a risk of something breaking

[Other]

* The tarball originated from here: https://github.com/canonical/dotnet-
source-build-security/actions/runs/17559116547

* 9.0.9 is the version number of the .NET Runtime and 9.0.110 is the version
  number of the .NET SDK.

* We are only building the 9.0.1xx feature band, because this is the only
  feature band that allows building from source. See explanation of feature
  bands: https://learn.microsoft.com/en-us/dotnet/core/releases-and-support#feature-bands-sdk-only

* Overview of how dotnet is versioned: https://learn.microsoft.com/en-
us/dotnet/core/versions/

** Affects: dotnet9 (Ubuntu)
     Importance: Medium
     Assignee: Dominik Viererbe (dviererbe)
         Status: In Progress

** Affects: dotnet9 (Ubuntu Plucky)
     Importance: Medium
     Assignee: Dominik Viererbe (dviererbe)
         Status: In Progress

** Affects: dotnet9 (Ubuntu Questing)
     Importance: Medium
     Assignee: Dominik Viererbe (dviererbe)
         Status: In Progress

-- 
[SRU] New upstream microrelease .NET 9.0.110/9.0.9
https://bugs.launchpad.net/bugs/2122355
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