The scala compiler read the source *.java (explicit in your log), but it doesn't compile them. To compile your *.scala it can used *.java OR *.class.

The classes generated into target/generated-sources/antlr don't exist into target/classes. The compilation is not done by maven-compiler-plugin. Wrong use of includes : it's a filter not a way to add sources dir. Try to remove it : you will have compilation error like

.../[168,17] cannot find symbol [ERROR] symbol : variable type

Sorry I don't know/search how to fix it.

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