Assembly.DefinedTypes throws a StackOverflowException

Asked Aug 30 '23 at 18:54

Active Aug 30 '23 at 18:54

Viewed 41 times

I have an issue where the following code can throw a StackOverflowException:

var t = typeof(SomeType).Assembly.DefinedTypes;

Debugging into it, the exception happens in RuntimeAssembly.cs at GetType(this):

internal RuntimeType[] GetDefinedTypes()
{
    return GetTypes(this);
}

It also seems to have something to do with target frameworks. SomeType is defined in a project that targets .NET 6. The executing project is targeting .NET 7. If I change the executing project to target .NET 6, the exception goes away.

Accessing Asssembly.DefinedTypes is the first call in Program.cs so there is no loop of any kind in my code. I've also tried rebooting and rebuilding. global.json specifies 7.0.400.

Any ideas what could cause this?

asked Aug 30 '23 at 18:54

Dan Friedman

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Weird problem. Where are you making this call? From inside `Main`? Or are you calling it from somewhere unusual, e.g. a type initializer or static constructor? – John Wu Aug 30 '23 at 19:05
`Main`. Literally the very first call in the program. – Dan Friedman Aug 30 '23 at 19:20
1

got a stacktrace? – T McKeown Aug 30 '23 at 19:41
There is no stack trace. – Dan Friedman Aug 30 '23 at 20:06
There's no stack trace when you get a stack overflow exception (for obvious reasons). See [this answer](https://stackoverflow.com/a/49882734/2791540) for other troubleshooting options. – John Wu Aug 30 '23 at 20:18
Not sure it will help but see [this answer](https://stackoverflow.com/a/18499906/2791540) – John Wu Aug 30 '23 at 20:20
Possibly a recursive reference in a static constructor somewhere. Might need an analyzer on the assembly – Charlieface Aug 30 '23 at 20:46
@JohnWu I can't get the first one to work. Assembly.Load works fine. – Dan Friedman Aug 30 '23 at 20:48
@Charlieface This is no static constructor. The entire app is literally one line. – Dan Friedman Aug 30 '23 at 20:49
Is your .NET fully up to date? Sounds like a bug in the framework. – Charlieface Aug 30 '23 at 22:19
An in the case that it is a bug in the framework, the [runtime team](https://github.com/dotnet/runtime) might be interested to hear about it. – NPras Sep 01 '23 at 04:27
I have a ticket into MS Support. I'll let you know what I find out. But I got it to repro by having the library project reference UnitsNet and then inheriting from one of its interfaces. Weird stuff. – Dan Friedman Sep 01 '23 at 19:26

Assembly.DefinedTypes throws a StackOverflowException

0 Answers0