David Neill-Asanza

Not the prettiest solution, but ```sh zsh

> Looking at your example and drawing on past experience, I suspected that the problem was with the sourced allocation statement, and that does appear the case (although there may...

I'll also pare down the example in this MR and add the new examples.

This does work, however: ```fortran program foo class(*), allocatable :: a character(len=0) :: s allocate(a, source=s) end program ```

This latest version has the minimal examples we found.