https://bugs.kde.org/show_bug.cgi?id=401512
Bug ID: 401512
Summary: kig crashes with simple python script with a failing
assertion
Product: kig
Version: unspecified
Platform: Fedora RPMs
OS: Linux
Status: REPORTED
Severity: crash
Priority: NOR
Component: general
Assignee: david.narv...@computer.org
Reporter: paol...@dmf.unicatt.it
Target Milestone: ---
Created attachment 116551
--> https://bugs.kde.org/attachment.cgi?id=116551&action=edit
kig file that makes kig crash
SUMMARY
kig crashes with:
kig: /usr/include/boost/python/object_core.hpp:422:
boost::python::api::object_base::~object_base(): Assertion `Py_REFCNT(m_ptr) >
0' failed.
when trying to define a simple python script with a numeric label as single
argument and returning a DoubleObject or loading a kig file with such a
construction.
STEPS TO REPRODUCE
1. Download the attachment "refcnt_bug.kig"
2. start kig with
kig refcnt_bug.kig
OBSERVED RESULT
crash with the message:
kig: /usr/include/boost/python/object_core.hpp:422:
boost::python::api::object_base::~object_base(): Assertion `Py_REFCNT(m_ptr) >
0' failed.
SOFTWARE/OS VERSIONS
I am using a Fedora 29 installation fully updated.
KDE Framework is kf5-5.50
QT5 5.11
boost-devel-1.66.0-14.fc29.x86_64
kig was downloaded from latest Git repository and compiled from source.
Python scripting support was correctly detected.
ADDITIONAL INFORMATION
The failing assert is contained in /usr/include/boost/python/object_core.hpp
a file contained in the Fedora package boost-devel-1.66.0-14.fc29.x86_64:
inline api::object_base::~object_base()
{
assert( Py_REFCNT(m_ptr) > 0 );
Py_DECREF(m_ptr);
}
It I comment the assert and recompile everything works apparently fine,
however the value of Py_REFCNT becomse -1 and then gets quite strange values
(seen by adding a printf in place of the assert) indicating memory allocation
problems.
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