Strange behaviour when using type(*) and character(*) in GFortran

[Carltoffel]

@kargl

23-007r1.pdf, p. 325
Except in references to intrinsic inquiry functions, if the dummy argument
is nonoptional and the actual argument is allocatable, the corresponding
actual argument shall be allocated.

This is not a numbered constraint, so it is the programmer’s responsibility to ensure an allocatable actual argument is allocated.

Makes totally sense because in many situations the compiler cannot know whether it is allocated or not.