hdr.dsFromHeader() fails with "SystemError" for gpg-pubkeys

rpm-python-4.8.0-14.fc13.x86_64 on current F-13:

import rpm
for hdr in rpm.TransactionSet().dbMatch("name", "gpg-pubkey"):
    print hdr.dsFromHeader()

Traceback (most recent call last):
  File "<stdin>", line 2, in <module>
SystemError: NULL result without error in PyObject_Call

Slightly different message with rpm-python-4.4.2.3-18.el5 on CentOS 5:

Traceback (most recent call last):
  File "<stdin>", line 2, in ?
SystemError: error return without exception set

rpm-python bug?

This affects rpmlint (DocFilesCheck.py). I wonder if I could just use hdr.dsOfHeader() instead of hdr.dsFromHeader() there, it doesn't seem to have the same problem (not to mention that even that doesn't have to be done for packages that don't have doc files...)

Sure it's an rpm-python bug, I'll look into it.

Fixed upstream now, pulling into Fedora shortly... Looking at rpm 4.4.x code, the actual rpmlint code works on Centos but breaks with the reproducer (its just the print blowing up), right?

hdr.dsOfHeader() and hds.dsFromHeader() are completly different things and can't be used interchangibly. dsOfHeader() returns basically
Provides: %{name} = %{version}-%{release}
whereas dsFromHeader() returns the actual requires/provides/obsoletes/conflicts dependencies.

(In reply to comment #2)
> Looking at rpm 4.4.x code,
> the actual rpmlint code works on Centos but breaks with the reproducer (its
> just the print blowing up), right?

Right. Ditto on F-12 with rpm-python-4.7.2-1.fc12.x86_64.

Ack. Fixed in rawhide now.

rpm-4.8.1-1.fc13 has been submitted as an update for Fedora 13.
http://admin.fedoraproject.org/updates/rpm-4.8.1-1.fc13

rpm-4.8.1-2.fc13 has been pushed to the Fedora 13 stable repository. If problems still persist, please make note of it in this bug report.