Mod crashing Forge on startup with no errors whatsoever

[Tiny Desk Engineer]

I created a simple test mod, built it, put it in the mods folder for my installation of Forge, and tried to test the mod, but Forge just crashes within seconds of launching Minecraft with no error whatsoever.

Here's the last line of debug.log, and also the only occurrence of the name of my mod in any of the generated logs:

[31Dec.2022 10:36:27.927] [main/DEBUG] [net.minecraftforge.fml.loading.moddiscovery.ModFileParser/LOADING]: Considering mod file candidate \mods\testmod-1.0.jar

Using Notepad's Find function to search for errors yields no results.

[warjort]

On the command line type:

gradlew --stacktrace runclient

this should show the error, given where it stops it is likely something broken in your mods.toml ?