I can't tell what's really going wrong because apport is segfaulting while
trying to record the issue...
(gdb) py-bt
#12 Frame 0x1c0eb00, for file
/usr/lib/python2.7/dist-packages/apt/__init__.py, line 23, in <module> ()
import apt_pkg
#28 Frame 0x25cdd30, for file
/usr/lib/python2.7/dist-packages/apport/packaging_impl.py, line 20, in
<module> ()
import apt
#42 Frame 0x2177940, for file
/usr/lib/python2.7/dist-packages/apport/fileutils.py, line 23, in <module>
()
from apport.packaging_impl import impl as packaging
#56 Frame 0x1a17c30, for file
/usr/lib/python2.7/dist-packages/apport/report.py, line 30, in <module> ()
import apport.fileutils
#70 Frame 0x27c9430, for file
/usr/lib/python2.7/dist-packages/apport/__init__.py, line 5, in <module> ()
from apport.report import Report
#86 Frame 0x18e3e80, for file
/usr/lib/python2.7/dist-packages/apport_python_hook.py, line 63, in
apport_excepthook (exc_type=<type at remote 0x7ffff610e540>,
exc_obj=exceptions.ValueError('Could not find filename for location',),
exc_tb=<traceback at remote 0x7ffff01d9c90>, StringIO=<built-in function
StringIO>, re=<module at remote 0x7ffff526e2d0>, traceback=<module at
remote 0x7ffff35d2e30>)
from apport.fileutils import likely_packaged, get_recent_crashes
I had to comment it out of sitecustomize.py and finally got this stack:
Traceback (most recent call last):
File
"/home/buck/trees/theirs/gcc-python-plugin/libcpychecker/__init__.py", line
79, in execute
self._check_refcounts(fun)
File
"/home/buck/trees/theirs/gcc-python-plugin/libcpychecker/__init__.py", line
85, in _check_refcounts
dump_json=self.dump_json)
File
"/home/buck/trees/theirs/gcc-python-plugin/libcpychecker/refcounts.py",
line 4361, in check_refcounts
maxtrans)
File
"/home/buck/trees/theirs/gcc-python-plugin/libcpychecker/refcounts.py",
line 4314, in impl_check_refcounts
trace, endstate, fun, rep)
File
"/home/buck/trees/theirs/gcc-python-plugin/libcpychecker/refcounts.py",
line 4148, in warn_about_NULL_without_exception
w.add_trace(trace, ExceptionStateAnnotator())
File
"/home/buck/trees/theirs/gcc-python-plugin/libcpychecker/diagnostics.py",
line 240, in add_trace
describe_trace(trace, self, annotator)
File
"/home/buck/trees/theirs/gcc-python-plugin/libcpychecker/diagnostics.py",
line 85, in describe_trace
'reaching: %s' % get_src_for_loc(destloc))
File "/home/buck/trees/theirs/gcc-python-plugin/gccutils/__init__.py",
line 27, in get_src_for_loc
return linecache.getline(loc.file, loc.line).rstrip()
ValueError: Could not find filename for location
I had to use this patch to get that stack trace rather than a segfault:
diff --git a/generate-location-c.py b/generate-location-c.py
index 7056617..7d302e0 100644
--- a/generate-location-c.py
+++ b/generate-location-c.py
@@ -38,7 +38,14 @@ def generate_location():
static PyObject *
PyGccLocation_get_file(struct PyGccLocation *self, void *closure)
{
- return PyGccString_FromString(gcc_location_get_filename(self->loc));
+ const char *result = gcc_location_get_filename(self->loc);
+ if (result == NULL) {
+ PyErr_SetString(PyExc_ValueError,
+ "Could not find filename for location");
+ return (PyObject *)NULL;
+ } else {
+ return PyGccString_FromString(result);
+ }
}
""")
This is the code I'm trying to check, if you want to reproduce the issue:
$ git remote -v
origin git@github.com:bukzor/MySQLdb1.git (fetch)
origin git@github.com:bukzor/MySQLdb1.git (push)
$ git rev-parse HEAD
0c156e3b34478bcda4c038a9fba67bf5bc07fda4
Finally, this is the command I'm running to reproduce the issue:
$ cat repro.sh
LD_LIBRARY_PATH=/home/buck/trees/theirs/gcc-python-plugin/gcc-c-api/ gdb
--args /usr/lib/gcc/x86_64-linux-gnu/4.8/cc1 -quiet -v -I
/usr/include/mysql -I /usr/include/python2.7 -imultiarch x86_64-linux-gnu
-iplugindir=/usr/lib/gcc/x86_64-linux-gnu/4.8/plugin -D NDEBUG -D
version_info='(1, 2, 4, ufinal, 1)' -D __version__=1.2.4 -D BIG_JOINS=1 -D
NDEBUG _mysql.c -iplugindir=/usr/lib/gcc/x86_64-linux-gnu/4.8/plugin -quiet
-dumpbase _mysql.c -mtune=generic -march=x86-64 -auxbase-strip
build/temp.linux-x86_64-2.7/_mysql.o -g -g -O2 -Wall -Wstrict-prototypes
-version -fplugin=/home/buck/trees/theirs/gcc-python-plugin/python.so
-fplugin-arg-python-command='from libcpychecker import main;
main(**{"verify_refcounting":True, "maxtrans":256, "dump_json":0})' -fwrapv
-fPIC -fno-strict-aliasing -fstack-protector -Wformat -Wformat-security -o
/tmp/ccqnoYh9.s
# python exec(open('/usr/lib/debug/usr/bin/python2.7-dbg-gdb.py').read())
