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arvindm95 / unladen-swallow

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reproduceable segfault with unladen #92

Open GoogleCodeExporter opened 8 years ago

GoogleCodeExporter commented 8 years ago 
This is a segfault with unladen 2009Q3. Environment:
Linux ar 2.6.18-128.7.1.el5 #1 SMP Mon Aug 24 08:21:56 EDT 2009 x86_64
x86_64 x86_64 GNU/Linux

gdb says:
Core was generated by `/tmp/unladen-2009Q3/python proxy.py'.
Program terminated with signal 11, Segmentation fault.
[New process 5200]
#0  PyDict_Merge (a=0x1ef41780, b=0x1ef41330, override=1) at
Objects/dictobject.c:2110
2110    Objects/dictobject.c: No such file or directory.
        in Objects/dictobject.c
(gdb) bt
#0  PyDict_Merge (a=0x1ef41780, b=0x1ef41330, override=1) at
Objects/dictobject.c:2110
#1  0x00002b0c111039b4 in SimpleType_new (type=0x2b0c11315060,
args=0x1eee5410, kwds=0x0) at /tmp/Python-2.6.2/Modules/_ctypes/_ctypes.c:1930
#2  0x0000000000526e23 in type_call (type=0x0, args=0x1eee5410, kwds=0x0)
at Objects/typeobject.c:731
#3  0x00000000004ddd7d in PyObject_Call (func=0x2b0c11315060,
arg=0x1eee5410, kw=0x0) at Objects/abstract.c:2487
#4  0x00000000004e0b2f in PyObject_CallFunctionObjArgs
(callable=0x2b0c11315060) at Objects/abstract.c:2718
#5  0x000000000054f260 in builtin_buildclass (self=<value optimized out>,
args=<value optimized out>) at Python/bltinmodule.c:253
#6  0x000000000055d492 in _PyEval_CallFunction (stack_pointer=0x1ef28ed0,
na=<value optimized out>, nk=<value optimized out>) at Python/eval.cc:4221
#7  0x0000000000556f9d in PyEval_EvalFrame (f=0x1ef28d50) at
Python/eval.cc:2697
#8  0x000000000055cefd in PyEval_EvalCodeEx (co=0x1eedec68, globals=<value
optimized out>, locals=<value optimized out>, args=0x0, argcount=0,
kws=0x0, kwcount=0, defs=0x0, defcount=0, closure=0x0)
    at Python/eval.cc:3278
#9  0x000000000055d912 in PyEval_EvalCode (co=0x0, globals=0x2b0c09f45a20,
locals=0x0) at Python/eval.cc:670
#10 0x00000000005729c7 in PyImport_ExecCodeModuleEx (name=0x7fff8814b77f
"ctypes", co=0x1eedec68, pathname=0x7fff88148560
"/usr/local/lib/python2.6/ctypes/__init__.pyc") at Python/import.c:688
#11 0x000000000057306e in load_source_module (name=0x7fff8814b77f "ctypes",
pathname=0x7fff88148560 "/usr/local/lib/python2.6/ctypes/__init__.pyc",
fp=<value optimized out>) at Python/import.c:979
#12 0x0000000000574a70 in load_package (name=0x7fff8814b77f "ctypes",
pathname=<value optimized out>) at Python/import.c:1035
#13 0x0000000000573819 in import_submodule (mod=0x1041800,
subname=0x7fff8814b77f "ctypes", fullname=0x7fff8814b77f "ctypes") at
Python/import.c:2553
#14 0x0000000000573d70 in load_next (mod=0x2b0c0a0cf248, altmod=0x1041800,
p_name=<value optimized out>, buf=0x7fff8814b770 "twisted.python.ctypes",
p_buflen=0x7fff8814c780) at Python/import.c:2377
#15 0x0000000000573fbd in PyImport_ImportModuleLevel (name=<value optimized
out>, globals=0x1ef0bde0, locals=<value optimized out>,
fromlist=0x1eed5150, level=-1) at Python/import.c:2095
#16 0x0000000000553559 in builtin___import__ (self=<value optimized out>,
args=<value optimized out>, kwds=<value optimized out>) at
Python/bltinmodule.c:49
#17 0x00000000004ddd7d in PyObject_Call (func=0x2b0c09f58560,
arg=0x1eecb940, kw=0x0) at Objects/abstract.c:2487
#18 0x0000000000553d96 in PyEval_CallObjectWithKeywords
(func=0x2b0c09f58560, arg=0x1eecb940, kw=0x0) at Python/eval.cc:47
#19 0x000000000054ea40 in builtin_import_name (self=<value optimized out>,
args=<value optimized out>) at Python/bltinmodule.c:1170
#20 0x000000000055d492 in _PyEval_CallFunction (stack_pointer=0x1e910388,
na=<value optimized out>, nk=<value optimized out>) at Python/eval.cc:4221
#21 0x0000000000556f9d in PyEval_EvalFrame (f=0x1e9101e0) at
Python/eval.cc:2697
#22 0x000000000055cefd in PyEval_EvalCodeEx (co=0x1eed1dd8, globals=<value
optimized out>, locals=<value optimized out>, args=0x1ef03a18, argcount=1,
kws=0x1ef03a20, kwcount=0, defs=0x0, defcount=0,
    closure=0x0) at Python/eval.cc:3278
#23 0x000000000055d316 in _PyEval_CallFunction (stack_pointer=0x1ef03a20,
na=1, nk=0) at Python/eval.cc:4365
#24 0x0000000000556f9d in PyEval_EvalFrame (f=0x1ef038a0) at
Python/eval.cc:2697
#25 0x000000000055cefd in PyEval_EvalCodeEx (co=0x1eed7030, globals=<value
optimized out>, locals=<value optimized out>, args=0x0, argcount=0,
kws=0x0, kwcount=0, defs=0x0, defcount=0, closure=0x0)
    at Python/eval.cc:3278
#26 0x000000000055d912 in PyEval_EvalCode (co=0x0, globals=0x2b0c09f45a20,
locals=0x0) at Python/eval.cc:670
#27 0x00000000005729c7 in PyImport_ExecCodeModuleEx (name=0x7fff8814f030
"twisted.python.win32", co=0x1eed7030, pathname=0x7fff8814ce70
"/usr/local/lib/python2.6/site-packages/twisted/python/win32.pyc")
    at Python/import.c:688
#28 0x000000000057306e in load_source_module (name=0x7fff8814f030
"twisted.python.win32", pathname=0x7fff8814ce70
"/usr/local/lib/python2.6/site-packages/twisted/python/win32.pyc",
fp=<value optimized out>)
    at Python/import.c:979
#29 0x0000000000573819 in import_submodule (mod=0x2b0c0a0cf248,
subname=0x7fff8814f03f "win32", fullname=0x7fff8814f030
"twisted.python.win32") at Python/import.c:2553
#30 0x0000000000573ce2 in load_next (mod=0x2b0c0a0cf248,
altmod=0x2b0c0a0cf248, p_name=<value optimized out>, buf=0x7fff8814f030
"twisted.python.win32", p_buflen=0x7fff88150040) at Python/import.c:2373
#31 0x0000000000573fff in PyImport_ImportModuleLevel (name=<value optimized
out>, globals=0x2b0c0a0cf248, locals=<value optimized out>,
fromlist=0x1ee0a560, level=<value optimized out>)
    at Python/import.c:2102
#32 0x0000000000553559 in builtin___import__ (self=<value optimized out>,
args=<value optimized out>, kwds=<value optimized out>) at
Python/bltinmodule.c:49
#33 0x00000000004ddd7d in PyObject_Call (func=0x2b0c09f58560,
arg=0x1eec0050, kw=0x0) at Objects/abstract.c:2487
#34 0x0000000000553d96 in PyEval_CallObjectWithKeywords
(func=0x2b0c09f58560, arg=0x1eec0050, kw=0x0) at Python/eval.cc:47
#35 0x000000000054ea40 in builtin_import_name (self=<value optimized out>,
args=<value optimized out>) at Python/bltinmodule.c:1170
#36 0x000000000055d492 in _PyEval_CallFunction (stack_pointer=0x1ef03808,
na=<value optimized out>, nk=<value optimized out>) at Python/eval.cc:4221
#37 0x0000000000556f9d in PyEval_EvalFrame (f=0x1ef03680) at
Python/eval.cc:2697
#38 0x000000000055cefd in PyEval_EvalCodeEx (co=0x1eebda40, globals=<value
optimized out>, locals=<value optimized out>, args=0x0, argcount=0,
kws=0x0, kwcount=0, defs=0x0, defcount=0, closure=0x0)
    at Python/eval.cc:3278
#39 0x000000000055d912 in PyEval_EvalCode (co=0x0, globals=0x2b0c09f45a20,
locals=0x0) at Python/eval.cc:670
#40 0x00000000005729c7 in PyImport_ExecCodeModuleEx (name=0x7fff88152670
"twisted.python.filepath", co=0x1eebda40, pathname=0x7fff881504a0
"/usr/local/lib/python2.6/site-packages/twisted/python/filepath.pyc")
    at Python/import.c:688
#41 0x000000000057306e in load_source_module (name=0x7fff88152670
"twisted.python.filepath", pathname=0x7fff881504a0
"/usr/local/lib/python2.6/site-packages/twisted/python/filepath.pyc",
    fp=<value optimized out>) at Python/import.c:979
#42 0x0000000000573819 in import_submodule (mod=0x2b0c0a0cf248,
subname=0x2b0c0d71bd14 "filepath", fullname=0x7fff88152670
"twisted.python.filepath") at Python/import.c:2553
#43 0x0000000000573ac1 in ensure_fromlist (mod=0x2b0c0a0cf248,
fromlist=0x1e8cb2d8, buf=0x7fff88152670 "twisted.python.filepath",
buflen=14, recursive=0) at Python/import.c:2464
#44 0x00000000005741a2 in PyImport_ImportModuleLevel (name=<value optimized
out>, globals=0x2b0c0a0cf248, locals=<value optimized out>,
fromlist=0x1e8cb2d8, level=<value optimized out>)
    at Python/import.c:2132
#45 0x0000000000553559 in builtin___import__ (self=<value optimized out>,
args=<value optimized out>, kwds=<value optimized out>) at
Python/bltinmodule.c:49
#46 0x00000000004ddd7d in PyObject_Call (func=0x2b0c09f58560,
arg=0x1ee007e0, kw=0x0) at Objects/abstract.c:2487
#47 0x0000000000553d96 in PyEval_CallObjectWithKeywords
(func=0x2b0c09f58560, arg=0x1ee007e0, kw=0x0) at Python/eval.cc:47
#48 0x000000000054ea40 in builtin_import_name (self=<value optimized out>,
args=<value optimized out>) at Python/bltinmodule.c:1170
#49 0x000000000055d492 in _PyEval_CallFunction (stack_pointer=0x1eea6208,
na=<value optimized out>, nk=<value optimized out>) at Python/eval.cc:4221
#50 0x0000000000556f9d in PyEval_EvalFrame (f=0x1eea6080) at
Python/eval.cc:2697
#51 0x000000000055cefd in PyEval_EvalCodeEx (co=0x1ee07d20, globals=<value
optimized out>, locals=<value optimized out>, args=0x0, argcount=0,
kws=0x0, kwcount=0, defs=0x0, defcount=0, closure=0x0)
    at Python/eval.cc:3278
#52 0x000000000055d912 in PyEval_EvalCode (co=0x0, globals=0x2b0c09f45a20,
locals=0x0) at Python/eval.cc:670
#53 0x00000000005729c7 in PyImport_ExecCodeModuleEx (name=0x7fff88155cb0
"twisted.protocols.amp", co=0x1ee07d20, pathname=0x7fff88153ae0
"/usr/local/lib/python2.6/site-packages/twisted/protocols/amp.pyc")
    at Python/import.c:688
#54 0x000000000057306e in load_source_module (name=0x7fff88155cb0
"twisted.protocols.amp", pathname=0x7fff88153ae0
"/usr/local/lib/python2.6/site-packages/twisted/protocols/amp.pyc",
fp=<value optimized out>)
    at Python/import.c:979
#55 0x0000000000573819 in import_submodule (mod=0x1e721638,
subname=0x2b0c0a0c8174 "amp", fullname=0x7fff88155cb0
"twisted.protocols.amp") at Python/import.c:2553
#56 0x0000000000573ac1 in ensure_fromlist (mod=0x1e721638,
fromlist=0x2b0c09f77d50, buf=0x7fff88155cb0 "twisted.protocols.amp",
buflen=17, recursive=0) at Python/import.c:2464
#57 0x00000000005741a2 in PyImport_ImportModuleLevel (name=<value optimized
out>, globals=0x1e721638, locals=<value optimized out>,
fromlist=0x2b0c09f77d50, level=<value optimized out>)
    at Python/import.c:2132
#58 0x0000000000553559 in builtin___import__ (self=<value optimized out>,
args=<value optimized out>, kwds=<value optimized out>) at
Python/bltinmodule.c:49
#59 0x00000000004ddd7d in PyObject_Call (func=0x2b0c09f58560,
arg=0x2b0c0a0b6d08, kw=0x0) at Objects/abstract.c:2487
---Type <return> to continue, or q <return> to quit---
#60 0x0000000000553d96 in PyEval_CallObjectWithKeywords
(func=0x2b0c09f58560, arg=0x2b0c0a0b6d08, kw=0x0) at Python/eval.cc:47
#61 0x000000000054ea40 in builtin_import_name (self=<value optimized out>,
args=<value optimized out>) at Python/bltinmodule.c:1170
#62 0x000000000055d492 in _PyEval_CallFunction (stack_pointer=0x1e4d7e78,
na=<value optimized out>, nk=<value optimized out>) at Python/eval.cc:4221
#63 0x0000000000556f9d in PyEval_EvalFrame (f=0x1e4d7cf0) at
Python/eval.cc:2697
#64 0x000000000055cefd in PyEval_EvalCodeEx (co=0x2b0c0a0d0258,
globals=<value optimized out>, locals=<value optimized out>, args=0x0,
argcount=0, kws=0x0, kwcount=0, defs=0x0, defcount=0, closure=0x0)
    at Python/eval.cc:3278
#65 0x000000000055d912 in PyEval_EvalCode (co=0x0, globals=0x2b0c09f45a20,
locals=0x0) at Python/eval.cc:670
#66 0x000000000057f5c1 in PyRun_FileExFlags (fp=0x1e49a2e0,
filename=0x7fff88157bd0 "proxy.py", start=<value optimized out>,
globals=0x1e394bf0, locals=0x1e394bf0, closeit=1, flags=0x7fff88157260)
    at Python/pythonrun.c:1389
#67 0x000000000057f868 in PyRun_SimpleFileExFlags (fp=<value optimized
out>, filename=0x7fff88157bd0 "proxy.py", closeit=1, flags=0x7fff88157260)
at Python/pythonrun.c:985
#68 0x00000000004d9f9c in Py_Main (argc=<value optimized out>,
argv=0x7fff88157388) at Modules/main.c:668
#69 0x000000314521d974 in __libc_start_main () from /lib64/libc.so.6
#70 0x00000000004d9119 in _start ()
(gdb)

unladen 2009Q2 and cpython works fine, they don't produce a segfault.

I can send the code in private if needed.

Original issue reported on code.google.com by nagy.att...@gmail.com on 24 Nov 2009 at 10:12

GoogleCodeExporter commented 8 years ago

Original comment by collinw on 9 Dec 2009 at 6:12

GoogleCodeExporter commented 8 years ago 
Can you check out trunk and see if you're still having this problem? The dict 
watcher system was redesigned 
recently to suck less, and it may have fixed this problem.

Original comment by collinw on 22 Mar 2010 at 8:32