Description Ole Sandum 2015-11-07 10:46:21 EST

The following code fails to compile at line 6 in Eclipse 4.5.1, however it does compile in JDK 1.8.0_60 using javac from the command line:

package test;

public class Test {

	public static void main(String[] args) {
        registerCommand(new Command<>(FooExecutor.class, data -> { //Line 6
        	
        }));
	}
	
	static void registerCommand(Command<?> command) {
		//Implementation irrelevant
	}

}

class Command<T extends CommandExecutor> {
	
	Command(Class<T> executorType, CommandHandler<T, ? extends CommandData<T>> handler) {
		
	}
	
}

interface CommandHandler<T extends CommandExecutor, D extends CommandData<T>> {
	void handle(D data);
}

interface CommandExecutor {
	//Implementation irrelevant
}

interface CommandData<T extends CommandExecutor> {
	//Implementation irrelevant
}

class FooExecutor implements CommandExecutor {
	//Implementation irrelevant
}

If I change line 6 to be (redundantly) more explicit, it compiles fine in Eclipse as well:

registerCommand(new Command<FooExecutor>(FooExecutor.class, (CommandData<FooExecutor> data) -> {
        	
}));



Surely this is a bug?