The "SubtractList" task failed unexpectedly about antlr4buildtasks

[emphasis87]

I see. I will give it a try sometime. I think you can close the issue for now.

[kaby76]

I updated the code to be more robust in the face of null pointers in SubtractList and MakeRelativeList. What happens here is that the Antlr Java tool outputs a list of files that it has generated. That list has to be cleaned up for MSBuild so it can compile those generated files. Unfortunately, MS's build rules for C# are rather picky: file names cannot be duplicated, otherwise one gets duplicate symbol definition errors in IDEs, builds. Please give the new package version a try by updating your .csproj file to 8.3 for Antlr4BuildTasks, and let me know how it goes. If this doesn't work, try to send me a diagnostic build trace, dotnet build --verbosity diagnostic. --Ken

[emphasis87]

Seems to work fine, thanks for the timely fix. Coincidentally, how do you debug the MSBuild task? If you have a prepared setup, could you please add it to this repository?

[kaby76]

Yes, debugging a build is tricky. What I do is place a Sleep() call somewhere in the code, start the build, then do an attach to msbuild.exe that I guess is the right one, and set the breakpoint to somewhere. It's a real headache because there are processes spawning processes.

[kaby76]

Building a C# program that only contains the .g4 file and no .cs files causes SubtractList to fail.