Cray ftn version 17 bug

[scrasmussen]

Expected Behavior

Builds correctly.

Current Behavior

We have gotten a report that when compiling with the new CCE 17 Fortran compiler, the following error is being reported:

ftn-1917 ftn: ERROR default$mapper$exchangeable_t$exchangeable_interface_,
                File = objects/exchangeable_h.f90, Line = 1, Column = 1

Since the type for base_ptr has a coarray ultimate component, it must be a
nonpointer nonallocatable scalar, must not be a coarray and must not be a
function result.

Steps to Reproduce (for bugs)

1. Load cce 17
2. Compile

Your Environment

• Version of the code used: develop branch
• Cluster: Perlmutter
• Compiler and version: Cray Compiler Environment 17

[gutmann]

Can you ID what in the code is an actual bug? This seems like a compiler problem. It is going to be very frustrating if the cray compiles stops supporting some very deep modular functionality... I know you can't have pointers or allocatable with coarray components... but I don't think ICAR does! (line 1 column 1 certainly doesn't). This might be a bug that needs to be reported to Cray(?)

[gutmann]

Any update on this?