ILLink removes embedded sources

[rolfbjarne]

Description

It seems the linker removes embedded sources from linked pdb files.

The test project is a .NET console project that references Microsoft.iOS.dll (TargetFramework=net10.0, not TargetFramework=net10.0-ios), and which is linked. Once linked, the resulting Microsoft.iOS.pdb in the publish directory has incorrect sourcelink information (it looks like the linker linked away some embedded sources).

Reproduction Steps

• Download: https://www.dropbox.com/scl/fi/huwlt21hfia8nx5qd81ch/console-5c86006.zip?rlkey=cpdt40558wa8p8wjj25sb0xlt&st=w391s4pa&dl=0

• Install a recent .NET 10 version (I used .NET preview.5.25223.119).

• Make sure the sourcelink .NET tool is installed (dotnet tool install -g sourcelink).

• Run ./repro.sh

Expected / actual behavior

Compare the resulting original.txt and actual.txt for expected and actual behavior.

Regression?

Yes, this is a regression in .NET 10 preview 4.

It's happening in these maestro bumps:

• [release/10.0.1xx-preview4] Update dependencies from dotnet/sdk macios#22679
• [net10.0] Update dependencies from dotnet/dotnet macios#22675

Known Workarounds

No response

Configuration

.NET 10 preview 4+

Other information

No response

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