DacPackage.UpdateModel() corrupts package, calling DacServices.GenerateDeployScript() fails afterwards.

Creating a new issue from #242 per request from @zijchen

• SqlPackage or DacFx Version: 162.0.52
• .NET Framework (Windows-only) or .NET Core: net48 and net6.0
• Environment (local platform and source/target platforms): N/A

Steps to Reproduce:

The issue repros when targeting net6.0 (likely netcoreapp3.1), it does not repro on net4.8:

var dacpacFromSqlproj = "OutputOfSqlproj.dacpac";

using var buffer = new MemoryStream();
using (var temp = File.OpenRead(dacpacFromSqlproj))
{
    temp.CopyTo(buffer); // to avoid modifying the original .dacpac file
}

buffer.Position = 0;
using (var dacpac = DacPackage.Load(buffer, DacSchemaModelStorageType.Memory, FileAccess.ReadWrite))
{
    dacpac.UpdateModel(
        new TSqlModel(SqlServerVersion.SqlAzure, new TSqlModelOptions()),
        new PackageMetadata());
}

buffer.Position = 0;
using var dacpac2 = DacPackage.Load(buffer);

var dacServices = new DacServices(@"Data Source=(LocalDB)\MSSQLLocalDB;Integrated Security=true");

// Next line throws when on net6.0 but works on net4.8:
// Microsoft.SqlServer.Dac.DacServicesException: An error occurred during deployment plan generation.Deployment cannot continue.
// ---> Microsoft.Data.Tools.Schema.Sql.Deployment.DeploymentFailedException: The calculated checksum for model.xml in the package is different from the saved checksum.
// ---> Microsoft.Data.Tools.Schema.Sql.Build.SqlPackageException: The calculated checksum for model.xml in the package is different from the saved checksum.
dacServices.GenerateDeployScript(dacpac2, "TargetDatabaseName");

Did this occur in prior versions? If not - which version(s) did it work in? Prior versions of DacFx failed at the DacPackage.Load(buffer) step (after the UpdateModel() call) when on netcore 3.1 or net6.0, see #242 for details. The issue repros on net6.0 runtime but not on net48.

(DacFx/SqlPackage/SSMS/Azure Data Studio)

[smichtch]

We have fixed this issue and should be in the August release. Meanwhile you can give it a try with our preview release: 162.1.39-preview

@zijchen, I tried the new version and can confirm it works, thanks for getting this fixed!

[czb182]

I’ve been following dacfx development for a while, at least to me it seems to be moving faster. Any chance of speeding up release cadence, maybe monthly or so? @zijchen