FUNCTION and SUB definitions cannot have line numbers

Description

Liberty BASIC supports the use of line numbers, for compatibility with traditional BASICs. However it is not always permissible to use a line number, for example if a FUNCTION or SUB statement has a line number an error will result.

Example code to demonstrate the bug

 10 CALL MySub
 20 PRINT MyFunction$()
 30 END
 40
 50 SUB MySub
 60   print "Hello ";
 70 END SUB
 80
 90 FUNCTION MyFunction$()
100   MyFunction$ = "world!"
110 END FUNCTION

This program should run, but in fact an error is reported.

Example code to work around the bug

Delete the line numbers from any FUNCTION or SUB statements:

 10 CALL MySub
 20 PRINT MyFunction$()
 30 END
 40
    SUB MySub
 60   print "Hello ";
 70 END SUB
 80
    FUNCTION MyFunction$()
100   MyFunction$ = "world!"
110 END FUNCTION