The attached patch incorporates two of Steve's "Orphaned Patches" -
https://gcc.gnu.org/pipermail/fortran/2023-June/059423.html

They have in common that they both involve faults in use of default
type and that I was the ultimate cause of the bugs.

The patch regtests with the attached testcases.

I will commit in the next 24 hours unless there are any objections.

Paul

Fortran: Fix default type bugs in gfortran [PR99139, PR99368]

2023-07-08  Steve Kargl  <sgk@troutmask.apl.washington.edu>

gcc/fortran
PR fortran/99139
PR fortran/99368
* match.cc (gfc_match_namelist): Check for host associated or
defined types before applying default type.
(gfc_match_select_rank): Apply default type to selector of
unlnown type if possible.
* resolve.cc (resolve_fl_variable): Do not apply local default
initialization to assumed rank entities.

gcc/testsuite/
PR fortran/999139
* gfortran.dg/pr99139.f90 : New test

PR fortran/99368
* gfortran.dg/pr99368.f90 : New test

Fortran: Fix default type bugs in gfortran [PR99139, PR99368]

2023-07-08  Steve Kargl  <sgk@troutmask.apl.washington.edu>

gcc/fortran
PR fortran/99139
PR fortran/99368
* match.cc (gfc_match_namelist): Check for host associated or
defined types before applying default type.
(gfc_match_select_rank): Apply default type to selector of
unlnown type if possible.
* resolve.cc (resolve_fl_variable): Do not apply local default
initialization to assumed rank entities.

gcc/testsuite/
PR fortran/999139
* gfortran.dg/pr99139.f90 : New test

PR fortran/99368
* gfortran.dg/pr99368.f90 : New test