@enough-analyst-54434: Easy enough to add the error message to

def dep_spec(self, options):

in

jvm_tool_mixin.py

, but not sure how to check to see if the spec is missing elsewhere with the

is_default

logic. In the debugger it looks like

self.context.resolve("':fake-wire-compiler'")

resolves to a synthetic

JarLibrary

object which holds the default classpath. I’m not sure where that synthetic target is generated.