Bug 2366480 - dftd4 fails to build with Python 3.14: Error: Interface mismatch in dummy procedure ‘argument_getter’ at (1): ALLOCATABLE mismatch in argument '_formal_1'
Summary: dftd4 fails to build with Python 3.14: Error: Interface mismatch in dummy pro...
Keywords:
Status: CLOSED NEXTRELEASE
Alias: None
Product: Fedora
Classification: Fedora
Component: dftd4
Version: rawhide
Hardware: Unspecified
OS: Unspecified
unspecified
unspecified
Target Milestone: ---
Assignee: Susi Lehtola
QA Contact:
URL:
Whiteboard:
Depends On: 2366511
Blocks: PYTHON3.14 F43FTBFS
TreeView+ depends on / blocked
 
Reported: 2025-05-15 11:02 UTC by Karolina Surma
Modified: 2025-08-27 22:15 UTC (History)
3 users (show)

Fixed In Version: dftd4-3.7.0-6.fc43
Clone Of:
Environment:
Last Closed: 2025-08-27 22:15:23 UTC
Type: Bug
Embargoed:


Attachments (Terms of Use)

Description Karolina Surma 2025-05-15 11:02:34 UTC
dftd4 fails to build with Python 3.14.0b1.

../app/argument.f90:114:53:

  114 |       call make_argument_list(new, argument_counter, argument_getter)
      |                                                     1
Error: Interface mismatch in dummy procedure ‘argument_getter’ at (1): ALLOCATABLE mismatch in argument '_formal_1'
../app/argument.f90:116:59:

  116 |       call make_argument_list(new, default_argument_count, get_default_argument)
      |                                                           1
Error: Interface mismatch in dummy procedure ‘argument_getter’ at (1): ALLOCATABLE mismatch in argument '_formal_1'

https://docs.python.org/3.14/whatsnew/3.14.html

For the build logs, see:
https://copr-be.cloud.fedoraproject.org/results/@python/python3.14-b1/fedora-rawhide-x86_64/09026875-dftd4/

For all our attempts to build dftd4 with Python 3.14, see:
https://copr.fedorainfracloud.org/coprs/g/python/python3.14-b1/package/dftd4/

Testing and mass rebuild of packages is happening in copr.
You can follow these instructions to test locally in mock if your package builds with Python 3.14:
https://copr.fedorainfracloud.org/coprs/g/python/python3.14-b1/

Let us know here if you have any questions.

Python 3.14 is planned to be included in Fedora 43.
To make that update smoother, we're building Fedora packages with all pre-releases of Python 3.14.
A build failure prevents us from testing all dependent packages (transitive [Build]Requires),
so if this package is required a lot, it's important for us to get it fixed soon.

We'd appreciate help from the people who know this package best,
but if you don't want to work on this now, let us know so we can try to work around it on our side.

Comment 1 Susi Lehtola 2025-05-15 11:14:52 UTC
Yeah, this is not Python related; it's a gfortran issue.


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