Bug 783080 - using GtkTreeModelFilter on x86_64 causes tracebacks
using GtkTreeModelFilter on x86_64 causes tracebacks
Product: Fedora
Classification: Fedora
Component: pygobject3 (Show other bugs)
x86_64 Linux
unspecified Severity unspecified
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Assigned To: John (J5) Palmieri
Fedora Extras Quality Assurance
Depends On:
  Show dependency treegraph
Reported: 2012-01-19 04:46 EST by Vratislav Podzimek
Modified: 2013-03-13 00:52 EDT (History)
3 users (show)

See Also:
Fixed In Version:
Doc Type: Bug Fix
Doc Text:
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Clone Of:
Last Closed: 2013-02-13 10:09:51 EST
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oVirt Team: ---
RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: ---

Attachments (Terms of Use)
Python code of the reproducer (1.26 KB, text/x-python)
2012-01-19 04:46 EST, Vratislav Podzimek
no flags Details
Glade file for the reproducer (3.29 KB, application/x-designer)
2012-01-19 04:47 EST, Vratislav Podzimek
no flags Details
Don't try to convert a string value that is set to None (853 bytes, patch)
2012-02-03 17:15 EST, John (J5) Palmieri
no flags Details | Diff

  None (edit)
Description Vratislav Podzimek 2012-01-19 04:46:14 EST
Created attachment 556229 [details]
Python code of the reproducer

Description of problem:
When using the GtkTreeModelFilter (see the attached reproducer), the following traceback appears for every item in the model:

Traceback (most recent call last):
  File "treeview_filter.py", line 7, in match_ahoj
    value = model.get_value(itr, 0)
  File "/usr/lib64/python2.7/site-packages/gi/overrides/Gtk.py", line 977, in get_value
    return self._decode_value(treeiter, column, value)
  File "/usr/lib64/python2.7/site-packages/gi/overrides/Gtk.py", line 803, in _decode_value
    value = value.decode('UTF-8')
AttributeError: 'NoneType' object has no attribute 'decode'

This only happens on x86_64 architecture, on i686 there are no tracebacks. It may be caused by some other point in the "Python-to-Gtk3 chain" pygobject is just the first suspected.

Version-Release number of selected component (if applicable):

How reproducible:
100 %

Steps to Reproduce:
1. run the attached reproducer on x86_64 system
Actual results:
Tracebacks appear.

Expected results:
No traceback would appear.
Comment 1 Vratislav Podzimek 2012-01-19 04:47:08 EST
Created attachment 556230 [details]
Glade file for the reproducer
Comment 2 Chris Lumens 2012-01-25 09:52:55 EST
As an additional data point, this was working for me on rawhide until I upgraded just now.  The previously working version of pygobject3 was pygobject3-2.90.4-1.fc17.x86_64.  Sorry, I do not know the versions of the gobject-introspection-* packages.  However, here's everything that was updated:

Jan 25 09:49:58 Updated: gobject-introspection-1.31.10-1.fc17.x86_64
Jan 25 09:50:00 Updated: gobject-introspection-devel-1.31.10-1.fc17.x86_64
Jan 25 09:50:02 Updated: pygobject3-3.0.3-2.fc17.x86_64
Jan 25 09:50:03 Updated: pygobject3-devel-3.0.3-2.fc17.x86_64
Comment 3 John (J5) Palmieri 2012-01-25 10:18:04 EST
Can you do a downgrade to see if it fixes the issue?
Comment 4 Vratislav Podzimek 2012-01-26 04:58:18 EST
Downgrading to pygobject3.x86_64 0:3.0.1-1.fc16 (without downgrading anything else) fixes this issue.
Comment 5 Vratislav Podzimek 2012-02-03 16:45:02 EST
Any idea? This bug blocks development of a part of the new UI for Anaconda. Since this is a regression, could you please at worse release a new version of pygobject3 with the old code?
Comment 6 John (J5) Palmieri 2012-02-03 17:11:27 EST
Ah this is the bug I had asked Chris about yesterday and we couldn't quite recall it.  Anyway I see the commit that caused this:

+    def _decode_value(self, treeiter, column, value):
+        type_ = self.get_column_type(column)
+        if type_ == GObject.TYPE_STRING and sys.version_info < (3, 0):
+            value = value.decode('UTF-8')
+        return value

I guess we can simply add a check for None there assuming None is a valid value for a string.
Comment 7 John (J5) Palmieri 2012-02-03 17:15:19 EST
Created attachment 559376 [details]
Don't try to convert a string value that is set to None
Comment 8 John (J5) Palmieri 2012-02-03 17:15:44 EST
Apply that patch to the package and see if it fixes your issues
Comment 9 Vratislav Podzimek 2012-02-08 06:59:03 EST
Yes, the proposed patch fixes the issue. I don't know how can None get there, but this works for me.
Comment 10 Fedora End Of Life 2013-01-16 09:08:17 EST
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Comment 11 Fedora End Of Life 2013-02-13 10:09:53 EST
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