** Description changed:
[Impact]
python3-pygraphviz does not work for even simple use cases on armhf
Bionic. See error output in Test Case section from adding an edge to a
graph.
This package is currently being used as a dependency of ROS2, which is
now including armhf as a target platform. The functionality that depends
on this package fails to run.
Conclusion from below testing is that the current package is somehow
corrupted.
A no-change rebuild in ppa:emersonknapp/ppa works properly on armhf.
[Test Case]
Using the following test file, and running python3 test.py, the program
raises an error. However program exits with no output as expected on
x86_64 and aarch64
```
# test.py
#!/usr/bin/env python3
import pygraphviz
graph = pygraphviz.AGraph()
graph.add_node('foo')
graph.add_node('bar')
graph.add_edge('foo', 'bar')
```
Error seen
```
Traceback (most recent call last):
File "/usr/lib/python3/dist-packages/pygraphviz/agraph.py", line 1561, in
__new__
nh = gv.agnode(graph.handle, n.encode(graph.encoding), _Action.find)
KeyError: 'agnode: no key'
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "test.py", line 8, in <module>
graph.add_edge('foo', 'bar')
File "/usr/lib/python3/dist-packages/pygraphviz/agraph.py", line 478, in
add_edge
e = Edge(self, eh=eh)
File "/usr/lib/python3/dist-packages/pygraphviz/agraph.py", line 1625, in
__new__
s = Node(graph, nh=source)
File "/usr/lib/python3/dist-packages/pygraphviz/agraph.py", line 1563, in
__new__
raise KeyError("Node %s not in graph." % n)
KeyError: 'Node None not in graph.'
```
-
[Regression Potential]
- This package doesn't currently seem to work at all, so I don't see how
- it could get worse.
+ This is a no-change rebuild, regression potential is very low.
[Other Info]
If I upgrade to 1.5 via pip after installing the apt dependency
libgraphviz-dev, this same snippet works on all of these platforms.
It also works if I install pygraphviz 1.4rc1 from pip. Also, it seems to
work with the debian package python3-pygraphviz 1.4 from cosmic. As far
as I can tell, there are no differences between the cosmic and the
bionic packages, other than it was rebuilt for Python 3.7.
Here's a summary:
Bionic 1.4~rc1 Debian Broken
Cosmic 1.4~rc1 Debian Works
Disco 1.5 Debian Works
Bionic 1.4~rc1 pip Works
Bionic 1.5 pip Works
And one more data point; if I pull down the debian sources (apt-get
source python3-pygraphviz ; apt-get build-dep python3-pygraphviz), build
with no modifications (debuild -uc -us), and then install (dpkg -i
python3-pygraphviz_1.4~rc1-1build2_armhf.deb), it works just fine.
From all of this, I can only conclude that the Ubuntu Bionic armhf
debian package is somehow corrupt. Perhaps a rebuild of the package
would solve the problem.
-
ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: python3-pygraphviz 1.4~rc1-1build2
ProcVersionSignature: Ubuntu 4.15.0-1041.43-aws 4.15.18
Uname: Linux 4.15.0-1041-aws aarch64
ApportVersion: 2.20.9-0ubuntu7.6
Architecture: armhf
Date: Wed Jun 26 22:23:47 2019
ProcEnviron:
TERM=xterm
PATH=(custom, no user)
LANG=en_US.UTF-8
SourcePackage: python-pygraphviz
UpgradeStatus: No upgrade log present (probably fresh install)
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https://bugs.launchpad.net/bugs/1834379
Title:
armhf Bionic python3-pygraphviz package errors for simple use case
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