Calling functions that have an implicit WorldContextObject parameter in a Blueprint function library will give a compile error about a missing __WorldContext pin

Calling functions that have an implicit WorldContextObject parameter (line trace, execute console command, etc) in a Blueprint function library will give a compile error about a missing __WorldContext pin.

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1. Open Editor
2. Create a new Function Library
3. Open the Function library
4. Create a new function
5. Hook up an Execute Console Command
6. Create another function in the library
7. Call and hook up the first function that was created
8. Compile and save
9. Open the level blueprint
10. Call the second function on begin play
11. Compile
12. Notice the following error "Error Could not find a pin for the parameter __WorldContext of NewFunction_1 on New Function 1"
13. Place a "Get player controller" to the seconds functions graph but DO NOT hook it up to anything. Just leave it floating
14. Compile and save
15. Open the Level blueprint
16. delete the old reference to the second function
17. Add another call to the second function and hook it up to begin play
18. Compile and Save
19. Notice this time the error did not occur (even though the player controller was not hooked up to anything)