Core: dotnet restore hang when running inside docker container

[omerlh]

For some reason, dotnet restoe hang on my project only when is running inside a container. You can find the sample repo here. To reproduce, just run docker build.
I used the docker image microsoft/dotnet:2.1-sdk, and this is the end of the diagnostic log from dotnet restore:

                   Property reassignment: $(MSBuildAllProjects)=";/usr/share/dotnet/sdk/2.1.302/Sdks/Microsoft.NET.Sdk/Sdk/Sdk.props;/usr/share/dotnet/sdk/2.1.302/Sdks/Microsoft.NET.Sdk/targets/Microsoft.NET.Sdk.props;/usr/share/dotnet/sdk/2.1.302/Sdks/Microsoft.NET.Sdk/targets/Microsoft.NET.Sdk.DefaultItems.props;/usr/share/dotnet/sdk/2.1.302/Sdks/Microsoft.NET.Sdk/targets/Microsoft.NET.SupportedTargetFrameworks.props;/usr/share/dotnet/sdk/2.1.302/Sdks/Microsoft.NET.Sdk/targets/Microsoft.NET.Sdk.CSharp.props;/usr/share/dotnet/sdk/2.1.302/Sdks/Microsoft.NET.Sdk/Sdk/Sdk.targets;/usr/share/dotnet/sdk/2.1.302/Sdks/Microsoft.NET.Sdk/targets/Microsoft.NET.Sdk.BeforeCommon.targets;/usr/share/dotnet/sdk/2.1.302/Sdks/Microsoft.NET.Sdk/targets/Microsoft.NET.DefaultAssemblyInfo.targets;/usr/share/dotnet/sdk/2.1.302/Sdks/Microsoft.NET.Sdk/targets/Microsoft.NET.DefaultOutputPaths.targets;/usr/share/dotnet/sdk/2.1.302/Sdks/Microsoft.NET.Sdk/targets/Microsoft.NET.TargetFrameworkInference.targets;/usr/share/dotnet/sdk/2.1.302/Sdks/Microsoft.NET.Sdk/targets/Microsoft.NET.RuntimeIdentifierInference.targets;/usr/share/dotnet/sdk/2.1.302/Sdks/Microsoft.NET.Sdk/targets/Microsoft.NET.NuGetOfflineCache.targets;/usr/share/dotnet/sdk/2.1.302/Microsoft.CSharp.CurrentVersion.targets;/blackbox.csproj;/usr/share/dotnet/sdk/2.1.302/Microsoft.Common.CurrentVersion.targets;/usr/share/dotnet/sdk/2.1.302/NuGet.targets;/usr/share/dotnet/sdk/2.1.302/15.0/Microsoft.Common.targets/ImportAfter/Microsoft.NET.Build.Extensions.targets;/usr/share/dotnet/sdk/2.1.302/Microsoft/Microsoft.NET.Build.Extensions/Microsoft.NET.Build.Extensions.targets;/usr/share/dotnet/sdk/2.1.302/15.0/Microsoft.Common.targets/ImportAfter/Microsoft.TestPlatform.ImportAfter.targets;/usr/share/dotnet/sdk/2.1.302/Microsoft.TestPlatform.targets;/usr/share/dotnet/sdk/2.1.302/Sdks/Microsoft.NET.Sdk/targets/Microsoft.NET.Sdk.targets;/usr/share/dotnet/sdk/2.1.302/Sdks/Microsoft.NET.Sdk/targets/Microsoft.NET.Sdk.Common.targets;/usr/share/dotnet/sdk/2.1.302/Sdks/Microsoft.NET.Sdk/targets/Microsoft.PackageDependencyResolution.targets;/usr/share/dotnet/sdk/2.1.302/Sdks/Microsoft.NET.Sdk/targets/Microsoft.NET.Sdk.DefaultItems.targets;/usr/share/dotnet/sdk/2.1.302/Sdks/Microsoft.NET.Sdk/targets/Microsoft.NET.DisableStandardFrameworkResolution.targets;/usr/share/dotnet/sdk/2.1.302/Sdks/Microsoft.NET.Sdk/targets/Microsoft.NET.GenerateAssemblyInfo.targets;/usr/share/dotnet/sdk/2.1.302/Sdks/Microsoft.NET.Sdk/targets/Microsoft.NET.ComposeStore.targets;/usr/share/dotnet/sdk/2.1.302/Sdks/Microsoft.NET.Sdk/targets/Microsoft.NET.CrossGen.targets;/usr/share/dotnet/sdk/2.1.302/Sdks/Microsoft.NET.Sdk/targets/Microsoft.NET.ObsoleteReferences.targets;/usr/share/dotnet/sdk/2.1.302/Sdks/Microsoft.NET.Sdk/targets/Microsoft.NET.Publish.targets;/usr/share/dotnet/sdk/2.1.302/Sdks/Microsoft.NET.Sdk/targets/Microsoft.NET.PreserveCompilationContext.targets;/usr/share/dotnet/sdk/2.1.302/Sdks/Microsoft.NET.Sdk/targets/Microsoft.NET.ConflictResolution.targets;/usr/share/dotnet/sdk/2.1.302/Sdks/Microsoft.NET.Sdk/targets/Microsoft.NET.DefaultPackageConflictOverrides.targets" (previous value: ";/usr/share/dotnet/sdk/2.1.302/Sdks/Microsoft.NET.Sdk/Sdk/Sdk.props;/usr/share/dotnet/sdk/2.1.302/Sdks/Microsoft.NET.Sdk/targets/Microsoft.NET.Sdk.props;/usr/share/dotnet/sdk/2.1.302/Sdks/Microsoft.NET.Sdk/targets/Microsoft.NET.Sdk.DefaultItems.props;/usr/share/dotnet/sdk/2.1.302/Sdks/Microsoft.NET.Sdk/targets/Microsoft.NET.SupportedTargetFrameworks.props;/usr/share/dotnet/sdk/2.1.302/Sdks/Microsoft.NET.Sdk/targets/Microsoft.NET.Sdk.CSharp.props;/usr/share/dotnet/sdk/2.1.302/Sdks/Microsoft.NET.Sdk/Sdk/Sdk.targets;/usr/share/dotnet/sdk/2.1.302/Sdks/Microsoft.NET.Sdk/targets/Microsoft.NET.Sdk.BeforeCommon.targets;/usr/share/dotnet/sdk/2.1.302/Sdks/Microsoft.NET.Sdk/targets/Microsoft.NET.DefaultAssemblyInfo.targets;/usr/share/dotnet/sdk/2.1.302/Sdks/Microsoft.NET.Sdk/targets/Microsoft.NET.DefaultOutputPaths.targets;/usr/share/dotnet/sdk/2.1.302/Sdks/Microsoft.NET.Sdk/targets/Microsoft.NET.TargetFrameworkInference.targets;/usr/share/dotnet/sdk/2.1.302/Sdks/Microsoft.NET.Sdk/targets/Microsoft.NET.RuntimeIdentifierInference.targets;/usr/share/dotnet/sdk/2.1.302/Sdks/Microsoft.NET.Sdk/targets/Microsoft.NET.NuGetOfflineCache.targets;/usr/share/dotnet/sdk/2.1.302/Microsoft.CSharp.CurrentVersion.targets;/blackbox.csproj;/usr/share/dotnet/sdk/2.1.302/Microsoft.Common.CurrentVersion.targets;/usr/share/dotnet/sdk/2.1.302/NuGet.targets;/usr/share/dotnet/sdk/2.1.302/15.0/Microsoft.Common.targets/ImportAfter/Microsoft.NET.Build.Extensions.targets;/usr/share/dotnet/sdk/2.1.302/Microsoft/Microsoft.NET.Build.Extensions/Microsoft.NET.Build.Extensions.targets;/usr/share/dotnet/sdk/2.1.302/15.0/Microsoft.Common.targets/ImportAfter/Microsoft.TestPlatform.ImportAfter.targets;/usr/share/dotnet/sdk/2.1.302/Microsoft.TestPlatform.targets;/usr/share/dotnet/sdk/2.1.302/Sdks/Microsoft.NET.Sdk/targets/Microsoft.NET.Sdk.targets;/usr/share/dotnet/sdk/2.1.302/Sdks/Microsoft.NET.Sdk/targets/Microsoft.NET.Sdk.Common.targets;/usr/share/dotnet/sdk/2.1.302/Sdks/Microsoft.NET.Sdk/targets/Microsoft.PackageDependencyResolution.targets;/usr/share/dotnet/sdk/2.1.302/Sdks/Microsoft.NET.Sdk/targets/Microsoft.NET.Sdk.DefaultItems.targets;/usr/share/dotnet/sdk/2.1.302/Sdks/Microsoft.NET.Sdk/targets/Microsoft.NET.DisableStandardFrameworkResolution.targets;/usr/share/dotnet/sdk/2.1.302/Sdks/Microsoft.NET.Sdk/targets/Microsoft.NET.GenerateAssemblyInfo.targets;/usr/share/dotnet/sdk/2.1.302/Sdks/Microsoft.NET.Sdk/targets/Microsoft.NET.ComposeStore.targets;/usr/share/dotnet/sdk/2.1.302/Sdks/Microsoft.NET.Sdk/targets/Microsoft.NET.CrossGen.targets;/usr/share/dotnet/sdk/2.1.302/Sdks/Microsoft.NET.Sdk/targets/Microsoft.NET.ObsoleteReferences.targets;/usr/share/dotnet/sdk/2.1.302/Sdks/Microsoft.NET.Sdk/targets/Microsoft.NET.Publish.targets;/usr/share/dotnet/sdk/2.1.302/Sdks/Microsoft.NET.Sdk/targets/Microsoft.NET.PreserveCompilationContext.targets;/usr/share/dotnet/sdk/2.1.302/Sdks/Microsoft.NET.Sdk/targets/Microsoft.NET.ConflictResolution.targets") at /usr/share/dotnet/sdk/2.1.302/Sdks/Microsoft.NET.Sdk/targets/Microsoft.NET.DefaultPackageConflictOverrides.targets (15,5)
                   Property reassignment: $(MSBuildAllProjects)=";/usr/share/dotnet/sdk/2.1.302/Sdks/Microsoft.NET.Sdk/Sdk/Sdk.props;/usr/share/dotnet/sdk/2.1.302/Sdks/Microsoft.NET.Sdk/targets/Microsoft.NET.Sdk.props;/usr/share/dotnet/sdk/2.1.302/Sdks/Microsoft.NET.Sdk/targets/Microsoft.NET.Sdk.DefaultItems.props;/usr/share/dotnet/sdk/2.1.302/Sdks/Microsoft.NET.Sdk/targets/Microsoft.NET.SupportedTargetFrameworks.props;/usr/share/dotnet/sdk/2.1.302/Sdks/Microsoft.NET.Sdk/targets/Microsoft.NET.Sdk.CSharp.props;/usr/share/dotnet/sdk/2.1.302/Sdks/Microsoft.NET.Sdk/Sdk/Sdk.targets;/usr/share/dotnet/sdk/2.1.302/Sdks/Microsoft.NET.Sdk/targets/Microsoft.NET.Sdk.BeforeCommon.targets;/usr/share/dotnet/sdk/2.1.302/Sdks/Microsoft.NET.Sdk/targets/Microsoft.NET.DefaultAssemblyInfo.targets;/usr/share/dotnet/sdk/2.1.302/Sdks/Microsoft.NET.Sdk/targets/Microsoft.NET.DefaultOutputPaths.targets;/usr/share/dotnet/sdk/2.1.302/Sdks/Microsoft.NET.Sdk/targets/Microsoft.NET.TargetFrameworkInference.targets;/usr/share/dotnet/sdk/2.1.302/Sdks/Microsoft.NET.Sdk/targets/Microsoft.NET.RuntimeIdentifierInference.targets;/usr/share/dotnet/sdk/2.1.302/Sdks/Microsoft.NET.Sdk/targets/Microsoft.NET.NuGetOfflineCache.targets;/usr/share/dotnet/sdk/2.1.302/Microsoft.CSharp.CurrentVersion.targets;/blackbox.csproj;/usr/share/dotnet/sdk/2.1.302/Microsoft.Common.CurrentVersion.targets;/usr/share/dotnet/sdk/2.1.302/NuGet.targets;/usr/share/dotnet/sdk/2.1.302/15.0/Microsoft.Common.targets/ImportAfter/Microsoft.NET.Build.Extensions.targets;/usr/share/dotnet/sdk/2.1.302/Microsoft/Microsoft.NET.Build.Extensions/Microsoft.NET.Build.Extensions.targets;/usr/share/dotnet/sdk/2.1.302/15.0/Microsoft.Common.targets/ImportAfter/Microsoft.TestPlatform.ImportAfter.targets;/usr/share/dotnet/sdk/2.1.302/Microsoft.TestPlatform.targets;/usr/share/dotnet/sdk/2.1.302/Sdks/Microsoft.NET.Sdk/targets/Microsoft.NET.Sdk.targets;/usr/share/dotnet/sdk/2.1.302/Sdks/Microsoft.NET.Sdk/targets/Microsoft.NET.Sdk.Common.targets;/usr/share/dotnet/sdk/2.1.302/Sdks/Microsoft.NET.Sdk/targets/Microsoft.PackageDependencyResolution.targets;/usr/share/dotnet/sdk/2.1.302/Sdks/Microsoft.NET.Sdk/targets/Microsoft.NET.Sdk.DefaultItems.targets;/usr/share/dotnet/sdk/2.1.302/Sdks/Microsoft.NET.Sdk/targets/Microsoft.NET.DisableStandardFrameworkResolution.targets;/usr/share/dotnet/sdk/2.1.302/Sdks/Microsoft.NET.Sdk/targets/Microsoft.NET.GenerateAssemblyInfo.targets;/usr/share/dotnet/sdk/2.1.302/Sdks/Microsoft.NET.Sdk/targets/Microsoft.NET.ComposeStore.targets;/usr/share/dotnet/sdk/2.1.302/Sdks/Microsoft.NET.Sdk/targets/Microsoft.NET.CrossGen.targets;/usr/share/dotnet/sdk/2.1.302/Sdks/Microsoft.NET.Sdk/targets/Microsoft.NET.ObsoleteReferences.targets;/usr/share/dotnet/sdk/2.1.302/Sdks/Microsoft.NET.Sdk/targets/Microsoft.NET.Publish.targets;/usr/share/dotnet/sdk/2.1.302/Sdks/Microsoft.NET.Sdk/targets/Microsoft.NET.PreserveCompilationContext.targets;/usr/share/dotnet/sdk/2.1.302/Sdks/Microsoft.NET.Sdk/targets/Microsoft.NET.ConflictResolution.targets;/usr/share/dotnet/sdk/2.1.302/Sdks/Microsoft.NET.Sdk/targets/Microsoft.NET.DefaultPackageConflictOverrides.targets;/usr/share/dotnet/sdk/2.1.302/Sdks/Microsoft.NET.Sdk/targets/Microsoft.NET.Sdk.CSharp.targets" (previous value: ";/usr/share/dotnet/sdk/2.1.302/Sdks/Microsoft.NET.Sdk/Sdk/Sdk.props;/usr/share/dotnet/sdk/2.1.302/Sdks/Microsoft.NET.Sdk/targets/Microsoft.NET.Sdk.props;/usr/share/dotnet/sdk/2.1.302/Sdks/Microsoft.NET.Sdk/targets/Microsoft.NET.Sdk.DefaultItems.props;/usr/share/dotnet/sdk/2.1.302/Sdks/Microsoft.NET.Sdk/targets/Microsoft.NET.SupportedTargetFrameworks.props;/usr/share/dotnet/sdk/2.1.302/Sdks/Microsoft.NET.Sdk/targets/Microsoft.NET.Sdk.CSharp.props;/usr/share/dotnet/sdk/2.1.302/Sdks/Microsoft.NET.Sdk/Sdk/Sdk.targets;/usr/share/dotnet/sdk/2.1.302/Sdks/Microsoft.NET.Sdk/targets/Microsoft.NET.Sdk.BeforeCommon.targets;/usr/share/dotnet/sdk/2.1.302/Sdks/Microsoft.NET.Sdk/targets/Microsoft.NET.DefaultAssemblyInfo.targets;/usr/share/dotnet/sdk/2.1.302/Sdks/Microsoft.NET.Sdk/targets/Microsoft.NET.DefaultOutputPaths.targets;/usr/share/dotnet/sdk/2.1.302/Sdks/Microsoft.NET.Sdk/targets/Microsoft.NET.TargetFrameworkInference.targets;/usr/share/dotnet/sdk/2.1.302/Sdks/Microsoft.NET.Sdk/targets/Microsoft.NET.RuntimeIdentifierInference.targets;/usr/share/dotnet/sdk/2.1.302/Sdks/Microsoft.NET.Sdk/targets/Microsoft.NET.NuGetOfflineCache.targets;/usr/share/dotnet/sdk/2.1.302/Microsoft.CSharp.CurrentVersion.targets;/blackbox.csproj;/usr/share/dotnet/sdk/2.1.302/Microsoft.Common.CurrentVersion.targets;/usr/share/dotnet/sdk/2.1.302/NuGet.targets;/usr/share/dotnet/sdk/2.1.302/15.0/Microsoft.Common.targets/ImportAfter/Microsoft.NET.Build.Extensions.targets;/usr/share/dotnet/sdk/2.1.302/Microsoft/Microsoft.NET.Build.Extensions/Microsoft.NET.Build.Extensions.targets;/usr/share/dotnet/sdk/2.1.302/15.0/Microsoft.Common.targets/ImportAfter/Microsoft.TestPlatform.ImportAfter.targets;/usr/share/dotnet/sdk/2.1.302/Microsoft.TestPlatform.targets;/usr/share/dotnet/sdk/2.1.302/Sdks/Microsoft.NET.Sdk/targets/Microsoft.NET.Sdk.targets;/usr/share/dotnet/sdk/2.1.302/Sdks/Microsoft.NET.Sdk/targets/Microsoft.NET.Sdk.Common.targets;/usr/share/dotnet/sdk/2.1.302/Sdks/Microsoft.NET.Sdk/targets/Microsoft.PackageDependencyResolution.targets;/usr/share/dotnet/sdk/2.1.302/Sdks/Microsoft.NET.Sdk/targets/Microsoft.NET.Sdk.DefaultItems.targets;/usr/share/dotnet/sdk/2.1.302/Sdks/Microsoft.NET.Sdk/targets/Microsoft.NET.DisableStandardFrameworkResolution.targets;/usr/share/dotnet/sdk/2.1.302/Sdks/Microsoft.NET.Sdk/targets/Microsoft.NET.GenerateAssemblyInfo.targets;/usr/share/dotnet/sdk/2.1.302/Sdks/Microsoft.NET.Sdk/targets/Microsoft.NET.ComposeStore.targets;/usr/share/dotnet/sdk/2.1.302/Sdks/Microsoft.NET.Sdk/targets/Microsoft.NET.CrossGen.targets;/usr/share/dotnet/sdk/2.1.302/Sdks/Microsoft.NET.Sdk/targets/Microsoft.NET.ObsoleteReferences.targets;/usr/share/dotnet/sdk/2.1.302/Sdks/Microsoft.NET.Sdk/targets/Microsoft.NET.Publish.targets;/usr/share/dotnet/sdk/2.1.302/Sdks/Microsoft.NET.Sdk/targets/Microsoft.NET.PreserveCompilationContext.targets;/usr/share/dotnet/sdk/2.1.302/Sdks/Microsoft.NET.Sdk/targets/Microsoft.NET.ConflictResolution.targets;/usr/share/dotnet/sdk/2.1.302/Sdks/Microsoft.NET.Sdk/targets/Microsoft.NET.DefaultPackageConflictOverrides.targets") at /usr/share/dotnet/sdk/2.1.302/Sdks/Microsoft.NET.Sdk/targets/Microsoft.NET.Sdk.CSharp.targets (14,5)
                   Property reassignment: $(DefineConstants)="TRACE;DEBUG" (previous value: "TRACE") at /usr/share/dotnet/sdk/2.1.302/Sdks/Microsoft.NET.Sdk/targets/Microsoft.NET.Sdk.CSharp.targets (31,5)
                   Property reassignment: $(DefineConstants)="TRACE;DEBUG;NETCOREAPP;NETCOREAPP2_1" (previous value: "TRACE;DEBUG") at /usr/share/dotnet/sdk/2.1.302/Sdks/Microsoft.NET.Sdk/targets/Microsoft.NET.Sdk.CSharp.targets (34,5)
                   Property reassignment: $(MSBuildAllProjects)=";/usr/share/dotnet/sdk/2.1.302/Sdks/Microsoft.NET.Sdk/Sdk/Sdk.props;/usr/share/dotnet/sdk/2.1.302/Sdks/Microsoft.NET.Sdk/targets/Microsoft.NET.Sdk.props;/usr/share/dotnet/sdk/2.1.302/Sdks/Microsoft.NET.Sdk/targets/Microsoft.NET.Sdk.DefaultItems.props;/usr/share/dotnet/sdk/2.1.302/Sdks/Microsoft.NET.Sdk/targets/Microsoft.NET.SupportedTargetFrameworks.props;/usr/share/dotnet/sdk/2.1.302/Sdks/Microsoft.NET.Sdk/targets/Microsoft.NET.Sdk.CSharp.props;/usr/share/dotnet/sdk/2.1.302/Sdks/Microsoft.NET.Sdk/Sdk/Sdk.targets;/usr/share/dotnet/sdk/2.1.302/Sdks/Microsoft.NET.Sdk/targets/Microsoft.NET.Sdk.BeforeCommon.targets;/usr/share/dotnet/sdk/2.1.302/Sdks/Microsoft.NET.Sdk/targets/Microsoft.NET.DefaultAssemblyInfo.targets;/usr/share/dotnet/sdk/2.1.302/Sdks/Microsoft.NET.Sdk/targets/Microsoft.NET.DefaultOutputPaths.targets;/usr/share/dotnet/sdk/2.1.302/Sdks/Microsoft.NET.Sdk/targets/Microsoft.NET.TargetFrameworkInference.targets;/usr/share/dotnet/sdk/2.1.302/Sdks/Microsoft.NET.Sdk/targets/Microsoft.NET.RuntimeIdentifierInference.targets;/usr/share/dotnet/sdk/2.1.302/Sdks/Microsoft.NET.Sdk/targets/Microsoft.NET.NuGetOfflineCache.targets;/usr/share/dotnet/sdk/2.1.302/Microsoft.CSharp.CurrentVersion.targets;/blackbox.csproj;/usr/share/dotnet/sdk/2.1.302/Microsoft.Common.CurrentVersion.targets;/usr/share/dotnet/sdk/2.1.302/NuGet.targets;/usr/share/dotnet/sdk/2.1.302/15.0/Microsoft.Common.targets/ImportAfter/Microsoft.NET.Build.Extensions.targets;/usr/share/dotnet/sdk/2.1.302/Microsoft/Microsoft.NET.Build.Extensions/Microsoft.NET.Build.Extensions.targets;/usr/share/dotnet/sdk/2.1.302/15.0/Microsoft.Common.targets/ImportAfter/Microsoft.TestPlatform.ImportAfter.targets;/usr/share/dotnet/sdk/2.1.302/Microsoft.TestPlatform.targets;/usr/share/dotnet/sdk/2.1.302/Sdks/Microsoft.NET.Sdk/targets/Microsoft.NET.Sdk.targets;/usr/share/dotnet/sdk/2.1.302/Sdks/Microsoft.NET.Sdk/targets/Microsoft.NET.Sdk.Common.targets;/usr/share/dotnet/sdk/2.1.302/Sdks/Microsoft.NET.Sdk/targets/Microsoft.PackageDependencyResolution.targets;/usr/share/dotnet/sdk/2.1.302/Sdks/Microsoft.NET.Sdk/targets/Microsoft.NET.Sdk.DefaultItems.targets;/usr/share/dotnet/sdk/2.1.302/Sdks/Microsoft.NET.Sdk/targets/Microsoft.NET.DisableStandardFrameworkResolution.targets;/usr/share/dotnet/sdk/2.1.302/Sdks/Microsoft.NET.Sdk/targets/Microsoft.NET.GenerateAssemblyInfo.targets;/usr/share/dotnet/sdk/2.1.302/Sdks/Microsoft.NET.Sdk/targets/Microsoft.NET.ComposeStore.targets;/usr/share/dotnet/sdk/2.1.302/Sdks/Microsoft.NET.Sdk/targets/Microsoft.NET.CrossGen.targets;/usr/share/dotnet/sdk/2.1.302/Sdks/Microsoft.NET.Sdk/targets/Microsoft.NET.ObsoleteReferences.targets;/usr/share/dotnet/sdk/2.1.302/Sdks/Microsoft.NET.Sdk/targets/Microsoft.NET.Publish.targets;/usr/share/dotnet/sdk/2.1.302/Sdks/Microsoft.NET.Sdk/targets/Microsoft.NET.PreserveCompilationContext.targets;/usr/share/dotnet/sdk/2.1.302/Sdks/Microsoft.NET.Sdk/targets/Microsoft.NET.ConflictResolution.targets;/usr/share/dotnet/sdk/2.1.302/Sdks/Microsoft.NET.Sdk/targets/Microsoft.NET.DefaultPackageConflictOverrides.targets;/usr/share/dotnet/sdk/2.1.302/Sdks/Microsoft.NET.Sdk/targets/Microsoft.NET.Sdk.CSharp.targets;/usr/share/dotnet/sdk/2.1.302/Sdks/NuGet.Build.Tasks.Pack/build/NuGet.Build.Tasks.Pack.targets" (previous value: ";/usr/share/dotnet/sdk/2.1.302/Sdks/Microsoft.NET.Sdk/Sdk/Sdk.props;/usr/share/dotnet/sdk/2.1.302/Sdks/Microsoft.NET.Sdk/targets/Microsoft.NET.Sdk.props;/usr/share/dotnet/sdk/2.1.302/Sdks/Microsoft.NET.Sdk/targets/Microsoft.NET.Sdk.DefaultItems.props;/usr/share/dotnet/sdk/2.1.302/Sdks/Microsoft.NET.Sdk/targets/Microsoft.NET.SupportedTargetFrameworks.props;/usr/share/dotnet/sdk/2.1.302/Sdks/Microsoft.NET.Sdk/targets/Microsoft.NET.Sdk.CSharp.props;/usr/share/dotnet/sdk/2.1.302/Sdks/Microsoft.NET.Sdk/Sdk/Sdk.targets;/usr/share/dotnet/sdk/2.1.302/Sdks/Microsoft.NET.Sdk/targets/Microsoft.NET.Sdk.BeforeCommon.targets;/usr/share/dotnet/sdk/2.1.302/Sdks/Microsoft.NET.Sdk/targets/Microsoft.NET.DefaultAssemblyInfo.targets;/usr/share/dotnet/sdk/2.1.302/Sdks/Microsoft.NET.Sdk/targets/Microsoft.NET.DefaultOutputPaths.targets;/usr/share/dotnet/sdk/2.1.302/Sdks/Microsoft.NET.Sdk/targets/Microsoft.NET.TargetFrameworkInference.targets;/usr/share/dotnet/sdk/2.1.302/Sdks/Microsoft.NET.Sdk/targets/Microsoft.NET.RuntimeIdentifierInference.targets;/usr/share/dotnet/sdk/2.1.302/Sdks/Microsoft.NET.Sdk/targets/Microsoft.NET.NuGetOfflineCache.targets;/usr/share/dotnet/sdk/2.1.302/Microsoft.CSharp.CurrentVersion.targets;/blackbox.csproj;/usr/share/dotnet/sdk/2.1.302/Microsoft.Common.CurrentVersion.targets;/usr/share/dotnet/sdk/2.1.302/NuGet.targets;/usr/share/dotnet/sdk/2.1.302/15.0/Microsoft.Common.targets/ImportAfter/Microsoft.NET.Build.Extensions.targets;/usr/share/dotnet/sdk/2.1.302/Microsoft/Microsoft.NET.Build.Extensions/Microsoft.NET.Build.Extensions.targets;/usr/share/dotnet/sdk/2.1.302/15.0/Microsoft.Common.targets/ImportAfter/Microsoft.TestPlatform.ImportAfter.targets;/usr/share/dotnet/sdk/2.1.302/Microsoft.TestPlatform.targets;/usr/share/dotnet/sdk/2.1.302/Sdks/Microsoft.NET.Sdk/targets/Microsoft.NET.Sdk.targets;/usr/share/dotnet/sdk/2.1.302/Sdks/Microsoft.NET.Sdk/targets/Microsoft.NET.Sdk.Common.targets;/usr/share/dotnet/sdk/2.1.302/Sdks/Microsoft.NET.Sdk/targets/Microsoft.PackageDependencyResolution.targets;/usr/share/dotnet/sdk/2.1.302/Sdks/Microsoft.NET.Sdk/targets/Microsoft.NET.Sdk.DefaultItems.targets;/usr/share/dotnet/sdk/2.1.302/Sdks/Microsoft.NET.Sdk/targets/Microsoft.NET.DisableStandardFrameworkResolution.targets;/usr/share/dotnet/sdk/2.1.302/Sdks/Microsoft.NET.Sdk/targets/Microsoft.NET.GenerateAssemblyInfo.targets;/usr/share/dotnet/sdk/2.1.302/Sdks/Microsoft.NET.Sdk/targets/Microsoft.NET.ComposeStore.targets;/usr/share/dotnet/sdk/2.1.302/Sdks/Microsoft.NET.Sdk/targets/Microsoft.NET.CrossGen.targets;/usr/share/dotnet/sdk/2.1.302/Sdks/Microsoft.NET.Sdk/targets/Microsoft.NET.ObsoleteReferences.targets;/usr/share/dotnet/sdk/2.1.302/Sdks/Microsoft.NET.Sdk/targets/Microsoft.NET.Publish.targets;/usr/share/dotnet/sdk/2.1.302/Sdks/Microsoft.NET.Sdk/targets/Microsoft.NET.PreserveCompilationContext.targets;/usr/share/dotnet/sdk/2.1.302/Sdks/Microsoft.NET.Sdk/targets/Microsoft.NET.ConflictResolution.targets;/usr/share/dotnet/sdk/2.1.302/Sdks/Microsoft.NET.Sdk/targets/Microsoft.NET.DefaultPackageConflictOverrides.targets;/usr/share/dotnet/sdk/2.1.302/Sdks/Microsoft.NET.Sdk/targets/Microsoft.NET.Sdk.CSharp.targets") at /usr/share/dotnet/sdk/2.1.302/Sdks/NuGet.Build.Tasks.Pack/build/NuGet.Build.Tasks.Pack.targets (18,5)
                   Property reassignment: $(PackageDescription)="Package Description" (previous value: "") at /usr/share/dotnet/sdk/2.1.302/Sdks/NuGet.Build.Tasks.Pack/build/NuGet.Build.Tasks.Pack.targets (32,5)
                   Property reassignment: $(GenerateNuspecDependsOn)="Build;_LoadPackInputItems; _GetTargetFrameworksOutput; _WalkEachTargetPerFramework; _GetPackageFiles; " (previous value: "_LoadPackInputItems; _GetTargetFrameworksOutput; _WalkEachTargetPerFramework; _GetPackageFiles; ") at /usr/share/dotnet/sdk/2.1.302/Sdks/NuGet.Build.Tasks.Pack/build/NuGet.Build.Tasks.Pack.targets (53,5)
^C

From some reason it is passing on Travis, so I guess this is something with the setup in our office.

[omerlh]

I think the issue was missing WORKDIR /app directive, I added it and now it is working. So weird...

[joshfree]

@MichaelSimons

[MichaelSimons]

I don't believe this issue is specific to docker containers rather it is an issue related to running dotnet restore from the root (the default working directory for containers). Running SDK commands like restore from the root is generally not a recommended practice because the way the tools scan all sub-folders looking for projects. Using a project folder as @omerlh discovered is the recommended pattern.
I would recommend following up with the CLI/NuGet folks regarding the hang.

[RodrigoLeiteF]

Sorry for reviving this issue, but while I understand what causes the command to hang I believe it should emit a warning or fail when being run from the root. It's especially frustrating because without setting the --verbose property you get no output at all when this is the case, making it extremely frustrating to figure out the issue (especially when googling "dotnet restore no output" gives a bunch of unrelated issues).

How does the team feel about this?