Error when .pc file lists conflicts

[joelspadin-garmin]

I have a system with the following files:

protobuf.pc

prefix=/usr
exec_prefix=/usr
libdir=/usr/lib
includedir=/usr/include

Name: Protocol Buffers
Description: Google's Data Interchange Format
Version: 3.15.2
Libs: -L${libdir} -lprotobuf -lpthread
Libs.private: -lz 

Cflags: -I${includedir} -pthread
Conflicts: protobuf-lite

protobuf-lite.pc

prefix=/usr
exec_prefix=/usr
libdir=/usr/lib
includedir=/usr/include

Name: Protocol Buffers
Description: Google's Data Interchange Format
Version: 3.15.2
Libs: -L${libdir} -lprotobuf-lite -lpthread
Cflags: -I${includedir} -pthread
Conflicts: protobuf

Running

python pykg-config.py --cflags --libs protobuf

fails because PackageNotFoundError is not defined at

pykg-config/pykg_config/result.py

Line 253 in 73d80a7

except PackageNotFoundError:

and pkg.name is not defined at

pykg-config/pykg_config/result.py

Line 258 in 73d80a7

raise PackageConflictError(pkg.name, conflict)

If I fix those issues, it then always raises a PackageConflictError because protobuf and protobuf-lite are mutually exclusive. I'm only trying to use one of them though, so it seems like that shouldn't have a conflict.

I would like to contribute a fix for this, but I'm not sure what the expected behavior here is. Should this conflict checking code maybe just be removed? When I run pkg-config on a PC running Ubuntu 20.04, it doesn't appear to care about conflicts.

$ pkg-config --cflags --libs protobuf
-pthread -lprotobuf -pthread
$ pkg-config --cflags --libs protobuf protobuf-lite
-pthread -lprotobuf -pthread -lprotobuf-lite -pthread