choco always fails with "Root element is missing" when executing "upgrade" or "uninstall"

[boskowski]

Each time I issue a "choco uninstall" for any installed package or a "choco upgrade" for any updatable package, the command fails with a laconic "Root element is missing".

choco uninstall log
choco upgrade log also containing this stacktrace:

System.Xml.XmlException: Root element is missing.
   at System.Xml.XmlTextReaderImpl.Throw(Exception e)
   at System.Xml.XmlTextReaderImpl.ParseDocumentContent()
   at System.Xml.Linq.XDocument.Load(XmlReader reader, LoadOptions options)
   at NuGet.XmlUtility.LoadSafe(Stream input, Boolean ignoreWhiteSpace)
   at NuGet.Manifest.ReadFrom(Stream stream, IPropertyProvider propertyProvider, Boolean validateSchema)
   at NuGet.LocalPackage.ReadManifest(Stream manifestStream)
   at NuGet.UnzippedPackage.EnsureManifest(String manifestFilePath)
   at NuGet.LocalPackageRepository.OpenPackage(String path)
   at NuGet.LocalPackageRepository.GetPackage(Func`2 openPackage, String path)
   at NuGet.LocalPackageRepository.<GetPackages>d__15.MoveNext()
   at NuGet.CollectionExtensions.AddRange[T](ICollection`1 collection, IEnumerable`1 items)
   at NuGet.LocalPackageRepository.FindPackagesById(Func`2 openPackage, String packageId)
   at NuGet.PackageRepositoryExtensions.FindPackagesById(IPackageRepository repository, String packageId)
   at NuGet.PackageRepositoryExtensions.FindPackage(IPackageRepository repository, String packageId, SemanticVersion version, IPackageConstraintProvider constraintProvider, Boolean allowPrereleaseVersions, Boolean allowUnlisted)
   at NuGet.PackageRepositoryExtensions.FindPackage(IPackageRepository repository, String packageId)
   at chocolatey.infrastructure.app.services.NugetService.upgrade_run(ChocolateyConfiguration config, Action`1 continueAction, Boolean performAction, Action`1 beforeUpgradeAction)
   at chocolatey.infrastructure.app.services.NugetService.upgrade_run(ChocolateyConfiguration config, Action`1 continueAction, Action`1 beforeUpgradeAction)
   at chocolatey.infrastructure.app.services.ChocolateyPackageService.perform_source_runner_function[T](ChocolateyConfiguration config, Func`2 function)
   at chocolatey.infrastructure.app.services.ChocolateyPackageService.upgrade_run(ChocolateyConfiguration config)
   at chocolatey.infrastructure.app.runners.GenericRunner.run(ChocolateyConfiguration config, Container container, Boolean isConsole, Action`1 parseArgs)
   at chocolatey.infrastructure.app.runners.ConsoleApplication.run(String[] args, ChocolateyConfiguration config, Container container)
   at chocolatey.console.Program.Main(String[] args)

I don't know if there's a connection, but the problem started appearing after I interrupted with Ctrl-C an inadvertently issued "choco update jre8". Deleting C:\ProgramData\chocolatey\config\chocolatey.config doesn't help.

[jberezanski]

I expect one (or more) of the .nupkg files under C:\ProgramData\chocolatey\lib is corrupted. You could verify this by moving package directories out of lib one by one (starting with jre8) and checking if the issue persists.

[boskowski]

Thank you very much, removing jre8 from lib solved the issue.

[ferventcoder]

#717 is where we will handle this.