Guard against some potential uses of uninitialised file units

Branch: bugfix/avoid_writing_to_unset_unit_write_parity

Branch: 8.1-RC

Merged

#506 · Created 2021-08-03 · Last updated 2021-08-03

Merged pull request

Merged in bugfix/avoid_writing_to_unset_unit_write_parity (pull request #506)

8faac19·Author: David Dickinson·Closed by: David Dickinson·2021-08-03

Many file units only active if diagnostics enabled and write_ascii is true, so we need to guard against using these units if write_ascii is false.