[Bug fortran/68846] Pointer function as LValue doesn't work when the assignment regards a dummy argument.

[gerhard.steinmetz.fort...@t-online.de]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68846

--- Comment #5 from Gerhard Steinmetz <gerhard.steinmetz.fort...@t-online.de> 
---

Related to pr70864  (technically slightly different).
Backtrace identical to that of pr70864 comment 3.