generate_load_scripts prevents restore after update.

[matthid]

Description

While trying to reproduce #2381 I noticed the following:

#r #"paket:
framework: netstandard2.0
//generate_load_scripts: true

nuget FSharp.Core
nuget Fake.Core.Target
nuget Fake.DotNet.Cli
nuget Fake.IO.FileSystem
nuget Microsoft.ServiceFabric.Client.Http 3.0.0-preview16 

//also produces error at lower version
nuget FSharp.Data
nuget Fake.IO.Zip
nuget TaskBuilder.fs 2.1.0 //"

open System.Collections.Generic
open System
open System.Threading
open System.Management.Automation



let connect creds =
    let sfClient = ServiceFabricClientBuilder()
                    .UseEndpoints(Uri(@"https://"+cluster+":19080"))
                    .UseX509Security(Func<CancellationToken,Task<SecuritySettings>>(getcreds))
                    .UseEndpoints(Uri(creds.Endpoint))
                    .UseX509Security(Func<CancellationToken,Task<SecuritySettings>>(getCreds creds))
                    .BuildAsync().GetAwaiter().GetResult();
    sfClient

> fake -vv run test.fsx
There was a problem while setting up the environment:
-> Folder C:\Users\matth\.nuget\packages\microsoft.servicefabric.client.http\3.0.0-preview16 doesn't exist. Did you restore group Main? Try to delete paket-files\paket.restore.cached and trying again.
   StackTrace:
        at Microsoft.FSharp.Core.PrintfModule.PrintFormatToStringThenFail@1637.Invoke(String message) in E:\A\_work\130\s\src\fsharp\FSharp.Core\printf.fs:line 1637
        at <StartupCode$Paket-Core>[email protected](PackageInfo package)
        at Microsoft.FSharp.Primitives.Basics.List.iter[T](FSharpFunc`2 f, FSharpList`1 x) in E:\A\_work\130\s\src\fsharp\FSharp.Core\local.fs:line 91
        at Paket.DependencyCache.StartSetupGroup(GroupName groupName)
        at Paket.DependencyCache.OrderedGroups(GroupName groupName)
        at [email protected](GroupName g)
        at Microsoft.FSharp.Collections.Internal.IEnumerator.map@75.DoMoveNext(b& curr) in E:\A\_work\130\s\src\fsharp\FSharp.Core\seq.fs:line 78
        at Microsoft.FSharp.Collections.Internal.IEnumerator.MapEnumerator`1.System-Collections-IEnumerator-MoveNext() in E:\A\_work\130\s\src\fsharp\FSharp.Core\seq.fs:line 64
        at Microsoft.FSharp.Collections.Internal.IEnumerator.map@75.DoMoveNext(b& curr) in E:\A\_work\130\s\src\fsharp\FSharp.Core\seq.fs:line 77
        at Microsoft.FSharp.Collections.Internal.IEnumerator.MapEnumerator`1.System-Collections-IEnumerator-MoveNext() in E:\A\_work\130\s\src\fsharp\FSharp.Core\seq.fs:line 64
        at Microsoft.FSharp.Collections.SeqModule.ToList[T](IEnumerable`1 source)
        at Paket.LoadingScripts.ScriptGeneration.generateScriptContent(PaketContext ctx)
        at Paket.LoadingScripts.ScriptGeneration.scriptData@338-1.GenerateNext(IEnumerable`1& next)
        at Microsoft.FSharp.Core.CompilerServices.GeneratedSequenceBase`1.MoveNextImpl() in E:\A\_work\130\s\src\fsharp\FSharp.Core\seqcore.fs:line 371
        at Microsoft.FSharp.Core.CompilerServices.GeneratedSequenceBase`1.System-Collections-IEnumerator-MoveNext() in E:\A\_work\130\s\src\fsharp\FSharp.Core\seqcore.fs:line 403
        at Microsoft.FSharp.Collections.SeqModule.ToList[T](IEnumerable`1 source)
        at Paket.LoadingScripts.ScriptGeneration.scriptData@336.GenerateNext(IEnumerable`1& next)
        at Microsoft.FSharp.Core.CompilerServices.GeneratedSequenceBase`1.MoveNextImpl() in E:\A\_work\130\s\src\fsharp\FSharp.Core\seqcore.fs:line 371
        at Microsoft.FSharp.Core.CompilerServices.GeneratedSequenceBase`1.System-Collections-IEnumerator-MoveNext() in E:\A\_work\130\s\src\fsharp\FSharp.Core\seqcore.fs:line 403
        at Paket.LoadingScripts.ScriptGeneration.constructScriptsFromData(DependencyCache depCache, FSharpList`1 groups, FSharpList`1 providedFrameworks, FSharpList`1 providedScriptTypes)
        at Paket.UpdateProcess.SmartInstall(DependenciesFile dependenciesFile, UpdateMode updateMode, UpdaterOptions options)
        at Paket.UpdateProcess.UpdateGroup(String dependenciesFileName, GroupName groupName, UpdaterOptions options)
        at <StartupCode$Paket-Core>[email protected](Unit unitVar0)
        at Paket.Utils.RunInLockedAccessMode[a](String lockedFolder, FSharpFunc`2 action)
        at Fake.Runtime.FakeRuntime.restoreOrUpdate@242(FakeConfig config, String cacheDir, Dependencies paketApi, FSharpOption`1 group, VerboseLevel logLevel, String script, String groupStr, FileInfo lockFilePath, Unit unitVar0) in d:\a\1\s\src\app\Fake.Runtime\FakeRuntime.fs:line 254
        at Fake.Runtime.FakeRuntime.paketCachingProvider(FakeConfig config, String cacheDir, Dependencies paketApi, Lazy`1 paketDependenciesFile, FSharpOption`1 group) in d:\a\1\s\src\app\Fake.Runtime\FakeRuntime.fs:line 344
        at Fake.Runtime.FakeRuntime.runScript(PrepareInfo preparedScript) in d:\a\1\s\src\app\Fake.Runtime\FakeRuntime.fs:line 596
        at Program.runOrBuild(RunArguments args) in d:\a\1\s\src\app\Fake.netcore\Program.fs:line 156
Hint: If you just upgraded the fake-runner you can try to remove the .fake directory and try again.

Expected behavior

"Works" (compiler error)

Actual behavior

Doesn't even start downloading nuget packages.

Known workarounds

remove generate_load_scripts: true temporarily

Related information

I guess this only reproduces when the nuget cache is missing the above packages.

[matthid]

This looks like a paket bug but I cannot reproduce this with standalone paket update.

[matthid]

This is actually fsprojects/Paket#2785 again