Could not load type 'SqlGuidCaster' from assembly Microsoft.Data.SqlClient
Alerinos opened this issue · 70 comments
Is there an existing issue for this?
- I have searched the existing issues
Describe the bug
Error:
System.Reflection.ReflectionTypeLoadException: „Unable to load one or more of the requested types.
Could not load type 'SqlGuidCaster' from assembly 'Microsoft.Data.SqlClient, Version=5.0.0.0, Culture=neutral, PublicKeyToken=23ec7fc2d6eaa4a5' because it contains an object field at offset 0 that is incorrectly aligned or overlapped by a non-object field.”
Code:
public static IEnumerable<Assembly> GetAssembliesWithTypesImplementing<T>()
{
return AppDomain.CurrentDomain.GetAssemblies()
.SelectMany(assembly => assembly.GetTypes())
.Where(type => !type.IsAbstract && typeof(T).IsAssignableFrom(type))
.Select(type => type.Assembly)
.Distinct();
}line:
assembly.GetTypes()
The error appeared after upgrading from .net 7 to .net 8 preview 1.
I searched and I don't have such Microsoft.Data.SqlClient package installed
Expected Behavior
No response
Steps To Reproduce
No response
Exceptions (if any)
No response
.NET Version
No response
Anything else?
No response
Even if you aren't using it directly you must have a transitive reference to Microsoft.Data.SqlClient (probably through EFCore) in order to have it present in the assembly list. So can you provide the minimal reproduction that can be debugged which exhibits this problem?
Hi @Alerinos Could you provide us with a sample repro? The provided code snippet is not enough information for us to investigate.
@Wraith2 @lcheunglci
I was able to reproduce the problem, here is the repo:
https://github.com/Alerinos/SQLError
Error:
@lcheunglci Let me know if there is a problem, if so is there a quick workaround? The problem occurs only on .net 8 in .net 7 everything is fine.
Ok. that's interesting. The problem isn't in SqlClient it's to do without how object layouts are computed in the Jit. It looks like a class that's laid out safely in 7 is now not safe in 8. Since 8 is still in very early preview this isn't a pressing problem but i'll see if i can find the people who might know what to do.
@David-Engel @MichalPetryka this is a result of the runtime optimization in dotnet/runtime#72549 which came from a suggestion on my new apis proposal dotnet/runtime#51836 (comment)
We've got a situation where the runtime was previously using struct SqlGuid{ byte[] _value; } and that has changed to struct SqlGuid{ Guid? _value; }. overlaying a struct with ref types in the same position was unsafe and icky but supported. In NET8 this changes to trying to overlay a value type and a ref type which is entirely illegal and causes the type loader to abort the assembly load.
I'm not sure of a good way to fix this. We can't detect the right pattern to use at runtime because we cannot have the old pattern in the assembly, the type loader will reject it.
If we choose to fix this only for net8 then we must have a day 1 build of SqlClient available to users when net8 launches or we prevent early adopters from using EFCore and NET8 which is a very poor PR look for this library.
@Wraith2
Well that's unfortunate. I thought we would be safe dynamically determining if we can call the new APIs at runtime, leaving the old SqlGuidCaster in there. If we create a .NET 8 target in the package to split it out, that would fix the problem, right? I had planned for us to do that later this year, but we might have to prioritize it sooner.
As long as no-one tries to load the non-8 assembly on 8 it should be ok. That would mean you can't take a <8 framework dependent install and run it on >= 8 but I'm not sure how important that scenario is.
I'd be nice to see if there's some way to have the <8 assembly work on 8 even if it was slow but i don't know how possible or performant that would be.
I forgot we left the hacky way in for .NET Core. It was significantly faster than the reflection method for the SqlTypeWorkarounds. So we have a couple of choices. Leave the hacks for < 8 and prioritize creating an 8+ assembly, or switch to reflection and take the perf hit to retain .NET 8 compatibility. Then we can add an 8+ assembly a little later and regain perf (on 8+ only) via the new SqlTypes APIs.
Edit: It was actually that the internal methods were stripped from .NET during the build and not available to even call via reflection. So perf would be even worse than I thought via the existing public APIs.
You could also detect which is applicable once via reflection (or statically based on TFM), caching it in a static readonly bool (this becomes a JIT time constant in Tier 1 code after rejit). -- Static detection based on TFM (e.g. using the pre-defined #if NET8_0_OR_GREATER) would also work, but wouldn't cover any "roll forward" considerations for users pulling in the .NET 7 version of the binary on .NET 8. That may or may not be acceptable
You can then use that + Unsafe.As<TFrom, TTo> to perform the "correct" conversion based on which is correct. You then don't need to rely on a union which may cause a TypeLoadException.
Of course, if there is a need for a fast/efficient API I'd really recommend opening an API proposal so this can be done safely and without any reflection or unsafe hacks: https://github.com/dotnet/runtime/issues/new?assignees=&labels=api-suggestion&template=02_api_proposal.yml&title=%5BAPI+Proposal%5D%3A+
The general API review process is detailed here: https://github.com/dotnet/runtime/blob/main/docs/project/api-review-process.md
Of course, if there is a need for a fast/efficient API I'd really recommend opening an API proposal so this can be done safely and without any reflection or unsafe hacks: https://github.com/dotnet/runtime/issues/new?assignees=&labels=api-suggestion&template=02_api_proposal.yml&title=%5BAPI+Proposal%5D%3A+
We did that part last year and the new APIs made it into .NET 7. Now we need to switch to them and account for this subsequent optimization of the internal SqlGuid references in .NET 8.
We did that part last year and the new APIs made it into .NET 7. Now we need to switch to them and account for this subsequent optimization of the internal SqlGuid references in .NET 8.
All done in the linked PR, #1934
@roji Just a heads up. This may have an impact on EF8 if EF8 wants to take a dependency on MDS 5.1. We need to figure out a way to ensure MDS 5.1 remains compatible with .NET 8.
Thanks for the heads up, /cc @ajcvickers.
FYI there's a pretty good chance EF 8.0 will end up targeting net8.0; as long as MDS5.1 works on that things should be OK.
We need to figure out a way to ensure MDS 5.1 remains compatible with .NET 8.
Just backport my PR. It removes the SqlGuidCaster because it was unused. No other type has changed. In general if the user hadn't used reflection to discover the type the error would never have occurred so people on current 5.1 may be fine as long as they don't try to interact with our internal types through reflection.
Just backport my PR. It removes the
SqlGuidCasterbecause it was unused. No other type has changed. In general if the user hadn't used reflection to discover the type the error would never have occurred so people on current 5.1 may be fine as long as they don't try to interact with our internal types through reflection.
Maybe I'm not remembering correctly, but I'm pretty sure SqlGuidCaster is still used against .NET 6 and that's the only .NET (Core) library we include in the 5.1 package. Good to know it's only reflection that has an issue, though.
On netcore we're using the SqlGuid(Guid) ctor because we can use the Guid(ReadOnlySpan<byte>) ctor to avoid the allocation. We aren't using the SqlGuidCaster in netcore at all. It can just be deleted.
This same issue is present in System.Data.SqlClient as I reported here.
Should we expect the fix for this issue to be backported from Microsoft.Data.SqlClient to System.Data.SqlClient?
I had the same issue here. After changing to GetExportedTypes() seems to fix the issue
Seems to be working on me @odesuk , trying to upgrade our .net6 to .net8
FROM: assembly.GetTypes()
TO: assembly.GetExportedTypes()
Notes:
GetExportedTypes() - This method returns only the public types that are visible outside the assembly.
GetTypes() - This method returns all types defined in the assembly, regardless of their access modifiers (public, private, internal, etc.).
My worries;
[RequiresUnreferencedCode("Types might be removed")]
public virtual Type[] GetExportedTypes() { throw NotImplemented.ByDesign; }
Where is the snippet from?
Where is the snippet from?
I know it's not something you want to do, but I'd appreciate an update of System.Data.SqlClient. After updating to net8.0, this library breaks code which scans assemblies in many of our projects.
I'd say that calling Assembly.GetTypes should be supported on any assembly. In our case, changing these calls to GetExportedTypes in a large codebase would be too much of a risk.
System.Data.SqlClient is deprecated and hasn't been released with the framework for several versions. Unless there is a security issue or a other high importance change that is required it is unlikely to get any backported changes. Combine that with the fact that the type which causes the problem is internal and you're using private reflection to find it and I think any change to it is very unlikely.
You should migrate to Microsoft.Data.SqlClient.
@ltrzesniewski use:
.Where(a => !string.Equals(a.FullName, "Microsoft.Data.SqlClient, Version=5.0.0.0, Culture=neutral, PublicKeyToken=23ec7fc2d6eaa4a5", StringComparison.OrdinalIgnoreCase))I'm experiencing this issue after migrating to Microsoft.Data.SqlClient.
This should be fixed in all the latest preview builds. Can you try one of those please.
Using the latest preview version build fixed my issue.
I used the following to add the preview package
dotnet add package Microsoft.Data.SqlClient --version 5.2.0-preview3.23201.1
I am getting this error in Azure Devops when trying to use the dotnet-ef tools to build my migration script using a command line "dotnet ef migrations script..." that worked before I upgraded to net 8. Not sure if the ef tools have been upgraded to support net 8 or where to post an issue.
You don't need to post an issue anywhere. It's this one, it was opened and if you read up 3 or so posts you'll see how to fix it.
@Wraith2
Hello, neither installing the latest preview package or using GetExportedTypes() worked for me. we are recently updating from net 3.1 to net 8. Please let me know whatever I can tell you that will help you help.
` // attempt #0 (original code)
services.AddAutoMapper(AppDomain.CurrentDomain.GetAssemblies());
// attempt #1
run "dotnet add package Microsoft.Data.SqlClient --version 5.2.0-preview3.23201.1" for Service.csproj, Data.csproj, and Entity.csproj
// attempt #2
var assemblies = AppDomain.CurrentDomain.GetAssemblies().ToList();
List<Type> types = new List<Type>();
foreach (var assembly in assemblies)
{
types.AddRange(assembly.GetExportedTypes());
}
services.AddAutoMapper(types.ToArray());
// attempt #3 (results in way less types and gives different error: "Method not found: '!!0 AutoMapper.IMapper.Map(System.Object)'.")
Type[] types_ = typeof(Microsoft.Data.SqlClient.ActiveDirectoryAuthenticationProvider).Assembly.GetExportedTypes();
services.AddAutoMapper(types_);
// attempt #4
IEnumerable<Assembly> assemblies = AppDomain.CurrentDomain.GetAssemblies()
.SelectMany(assembly => assembly.GetExportedTypes())
.Select(type => type.Assembly)
.Distinct();
services.AddAutoMapper(assemblies);`
You've not uninstalled the previous version of System.Data.SqlClient or you've got another problem. There's no way for me to tell which. You'll have to debug and identify the issue.
@dot-net-user12345 Which Entity Framework packages do you use?
@ErikEJ
PM> dotnet list package
Project 'Data' has the following package references
[net8.0]:
Top-level Package Requested Resolved
DocumentFormat.OpenXml 3.0.0 3.0.0
EntityFramework 6.4.4 6.4.4
Microsoft.Data.SqlClient 5.2.0-preview3.23201.1 5.2.0-preview3.23201.1
Microsoft.EntityFrameworkCore 8.0.0 8.0.0
Microsoft.EntityFrameworkCore.SqlServer 8.0.0 8.0.0
Microsoft.EntityFrameworkCore.Tools 8.0.0 8.0.0
Newtonsoft.Json 13.0.3 13.0.3
StyleCop.Analyzers 1.1.118 1.1.118
Project 'Service' has the following package references
[net8.0]:
Top-level Package Requested Resolved
AutoMapper.Extensions.Microsoft.DependencyInjection 12.0.1 12.0.1
DocumentFormat.OpenXml 3.0.0 3.0.0
Microsoft.AspNetCore.Mvc.NewtonsoftJson 8.0 8.0.0
Microsoft.Data.SqlClient 5.2.0-preview3.23201.1 5.2.0-preview3.23201.1
Microsoft.EntityFrameworkCore 8.0 8.0.0
Microsoft.EntityFrameworkCore.Design 8.0 8.0.0
Microsoft.EntityFrameworkCore.SqlServer 8.0 8.0.0
Microsoft.VisualStudio.Web.CodeGeneration.Design 8.0 8.0.0
StyleCop.Analyzers 1.1.118 1.1.118
System.Net.Http.WinHttpHandler 8.0.0 8.0.0
Project 'Test' has the following package references
[net8.0]:
Top-level Package Requested Resolved
coverlet.collector 6.0.0 6.0.0
Microsoft.Data.SqlClient 5.2.0-preview3.23201.1 5.2.0-preview3.23201.1
Microsoft.NET.Test.Sdk 17.8.0 17.8.0
MSTest.TestAdapter 3.1.1 3.1.1
MSTest.TestFramework 3.1.1 3.1.1
NSubstitute 5.1.0 5.1.0
NUnit 3.14.0 3.14.0
NUnit3TestAdapter 4.5.0 4.5.0
StyleCop.Analyzers 1.1.118 1.1.118
Project 'Data.Test' has the following package references
[net8.0]:
Top-level Package Requested Resolved
Microsoft.Data.SqlClient 5.2.0-preview3.23201.1 5.2.0-preview3.23201.1
Microsoft.EntityFrameworkCore.InMemory 8.0.0 8.0.0
Microsoft.NET.Test.Sdk 17.8.0 17.8.0
NSubstitute 5.1.0 5.1.0
NUnit 3.14.0 3.14.0
NUnit3TestAdapter 4.5.0 4.5.0
StyleCop.Analyzers 1.1.118 1.1.118
@dot-net-user12345 Remove the "EntityFramwork" package, it uses Sustem.Data.SqlClient
Hi there. Just came across this issue myself when upgrading a service to .net 8, the 5.2.0-preview fixes it as said here. Just wondering if there's an idea of how far out a full 5.2.0 release will be for this? Many thanks! 🙂
I'm experiencing this issue after migrating to Microsoft.Data.SqlClient.
I am facing the exact same issue. What's the workaround for this problem?
I'm experiencing this issue after migrating to Microsoft.Data.SqlClient.
I am facing the exact same issue. What's the workaround for this problem?
I had the samme issue. Upgrading to the preview 3 version of 5.2.0 works.
For now this i blocking me from upgrading to .NET 8 as I'm not too happy about releasing a preview version to a production environment.
@Wraith2 is there an ETA of the next preview or even better the release of 5.2.0? The last preview was almost half a year ago so I was thinking that the release should be close or?
I'm a contributor, I have no input on release schedules.
@Wraith2 alright thanks - sorry for the assumption. Do you know anyone who would know this?
@SuneMonrad I am also just a contributor, but it looks like the current plan is preview 4 this month, and 5.2 RTM in beginning of next year.
@ErikEJ thank you - that sounds promising.
Do you know if there is anywhere where the current roadmap is documented?
@SuneMonrad I think some plans were mentioned in some blog posts but as you can see they are jinxed at the moment, so not of any value.
Same here, the issue is solved in the latest version of the NuGet package Microsoft.Data.SqlClient -> 5.2.0-preview.4.23342.2. I hope the final release will be out soon.
I put some estimated dates in https://github.com/dotnet/SqlClient/milestones. Keep in mind they are just targets. Original 5.2 GA target was mid-Nov.
replace with Rabota.Data.SqlClient" Version="3.0.24"
That's an unofficial package which seems to simply be a copy of this repository. Doesn't seem like a good idea.
Either find what is going reflection on private types and stop it, because it's a bad idea to do that.
Or, use the preview package available from this repository
Or, wait for the next full release which seems to be taking a very long time but will happen eventually.
Contacting the owner to ask to remove the package metadata to not link to the SQLClient project
Just to make sure I understand, the options are:
- Ensure no usage of old SqlClient in the application or in any of its dependencies, then update the application to a preview version of new SqlClient;
- Ensure no unguarded invocation of
assembly.GetTypes()by the application or by any of its dependencies; - Use a third-party build of SqlClient; and/or
- Do not adopt .NET 8.
The bug was determined to not be the runtime's or reflection's responsibility but instead that of the SqlClients. It's not a severe enough bug to warrant an out-of-band release for new SqlClient or any release ever of old SqlClient — unless we manage to figure out how to use the bug as an exploit.
Is that an accurate summary?
Personally, I think that this bug is severe enough to have been a .NET 8 release blocker, but I'll deal. I don't have time for option 1 or 2 right now. I don't trust option 3. Thus my immediate plan is option 4: roll back the one project that I had upgraded to try out .NET 8.
Since it was merged more than 6 months ago I really can't understand why there hasn't been an official release.
I can't understand how this isn't severe enough to warrant backporting to System.Data.SqlClient. Deprecated doesn't mean abandoned.
They have now marked all the 5.2.0-preview versions as deprecated due to CVE-2024-0056 without even releasing a new one. So now we either have to use a version with a known vulnerability or stay on .NET 6/7.
@JRahnama v5.1.4 does not address this issue, it still crashes with ReflectionTypeLoadException the moment anybody calls GetTypes() on the assembly. It was clearly made to address CVE-2024-0056 as I mentioned before, it has nothing to do with this issue.
Version 5.2.0-preview5.24024.3 seems to fix the issue (5.1.4 does not), is there any chance of 5.2.0 final being published in the near future (February)?
@dioptryk Yes, the current plan is end of Feb, as you can see here: https://github.com/dotnet/SqlClient/milestone/60
I just hit this error which was being hidden in the depths of a third-party library, wasting many hours.
It is really disappointing that a GA fix hasn't been released after almost a year.
It is really disappointing that a GA fix hasn't been released after almost a year.
GA 5.2.0 is scheduled for the end of this month, pending any unforeseen circumstances.
Just seeing 5.2.0 is releasing ;)
I’ll be interested to see if this release resolves the issue for everyone. Since this has been marked fixed for the better part of a year, but wasn’t.
Early review of the 5.2.0 version (plus System.Data.SqlClient 4.8.6) resolves the issue I had with .NET 8.0 and SqlGuidCaster throwing up.
Or use Signals to cut through the slack.
This bug is relevant for a version 5.2.1. It works on MacOS, but in Windows it shows an error:
Message:
System.Reflection.ReflectionTypeLoadException : Unable to load one or more of the requested types.
Could not load type 'SqlGuidCaster' from assembly 'System.Data.SqlClient, Version=4.6.1.6, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a' because it contains an object field at offset 0 that is incorrectly aligned or overlapped by a non-object field.
Stack Trace:
RuntimeModule.GetTypes(RuntimeModule module)
RuntimeModule.GetTypes()
Update: We used System instead of Microsoft version. @Wraith2 Thanks a lot for clarifying it!
In the error message you can see that it says "System.Data.SqlClient", that means you're loading the system version of the library which as has been discussed in this thread will not be updated. Stop doing that.
Here's an extension method you can use instead of Assembly.GetTypes(), if it can help:
public static Type[] GetLoadableTypes(this Assembly assembly)
{
try
{
return assembly.GetTypes();
}
catch (ReflectionTypeLoadException ex)
{
return ex.Types.Where(t => t is not null).ToArray()!;
}
}For anyone who has this issue but is also worried about #2378, v5.2.0-preview5.24024.3 supposedly solves both issues on .net 8. I'll keep y'all posted how it goes.
@aaron777collins How about 5.2.1 ?
@aaron777collins How about 5.2.1 ?
Supposedly the connectivity issue is even worse on 5.2.1. It's not a solution since the apps we have are under high load.