Not able to debug assembly

[greenozon]

dnSpyEx version

6.5.1

Describe the Bug

I'd like to investigate some weird fresh bug in latest ILSpy and I wanted to debug it,
but all of a sudden I"ve hit strange error on debug start:

from ILSpy about:

ILSpy version 9.0.0.7814-preview2+c66733f353a24174dbc7c9283333b50f796cd426
.NET version 8.0.8+08338fcaa5c9b9a8190abb99222fed12aaba956c

How To Reproduce

Download CI build from master, eg: ILSpy version 9.0.0.7814-preview2
ILSpy 9.0.0.7814-preview2 (Debug)

Expected Behavior

Debugger starts up successfully

Actual Behavior

see error window above

Additional Context

No response

[ElektroKill]

Hey,

I'm unable to reproduce this issue using the latest dnSpyEx CI build. Both .net framework and .net-x64 compiled binaries have no trouble debugging the ILSpy build you linked.

[greenozon]

Oh Gosh!
what assembly did you try while trying to repro?
I was trying ILSpy.exe but seems it was a terrible mistake, right?
how about adding some reminder (error box) for forgetful person like me/ :)

[ElektroKill]

Starting the debugging with either ILSpy.dll or ILSpy.exe works for me. dnSpy should identify .NET apphost .exe files and debug them appropriately

[greenozon]

OK, then I've hit 100% repro trying to debug ILSpy.exe

are there any hints how could I dig more info to track this case down?

[ElektroKill]

Honestly, I have no clue what could be going on here since CorDebug does not seem to be reporting any kind of meaningful error code to indicate what is actually going wrong. Are you perhaps debugging ILSpy.exe with the .NET Framework engine rather than the .NET engine?

[greenozon]

is it possible to debug dnSpy while it tries to debug ILSpy?

[greenozon]

yes, it was .NET in the drop-down control "Debug engine"

[ElektroKill]

is it possible to debug dnSpy while it tries to debug ILSpy?

Yes you can either use multiple instances of dnSpy:

1. Start dnSpy
2. Open dnSpy.exe in dnSpy
3. Start debugging
4. You are now debugging dnSpy and can debug another file

or you can just pull in the dnSpy source from GitHub and open it in an IDE on windows.