vim crashes during code completion

[composition]

Hi,
While performing code completion, vim segfaults due to clang_complete. Here are the details of the system and the problem.

OS: Ubuntu 12.04 , Linux 3.2.0
vim version: VIM - Vi IMproved 7.3 (compiled with python enabled)
clang-complete version: latest pulled today from master
clang version: clang 3.4

Error printed on exit:
Vim: Caught deadly signal SEGV
Vim: preserving files...
Error detected while processing function ClangComplete:Vim: Finished.

line 22:
Exception KeyError: KeyError(140558993356544,) in <module 'threading' from '/usr/lib/python2.7/threading.pyc'> ignoredTraceback (most recent call last):
File "", line 1, in File "~/.vim/bundle/vundle/plugin/libclang.py", line 468, in getCurrentCompletions cancel = int(vim.eval('complete_check()'))
AttributeError: 'NoneType' object has no attribute 'eval'close failed in fi
le object destructor:
sys.excepthook is missing lost sys.stderr
Segmentation fault (core dumped)

backtraces:
Thread 1 (Thread 0x7fd67763d7c0 (LWP 11203)):
#0 sem_wait () at ../nptl/sysdeps/unix/sysv/linux/x86_64/sem_wait.S:86
#1 0x00007fd675bbbe28 in PyThread_acquire_lock () from /usr/lib/libpython2.7.so.1.0
#2 0x00007fd675bbcd34 in PyEval_RestoreThread () from /usr/lib/libpython2.7.so.1.0
#3 0x00007fd675b85a77 in ?? () from /usr/lib/libpython2.7.so.1.0
#4 0x00007fd675b27914 in ?? () from /usr/lib/libpython2.7.so.1.0
#5 0x00007fd675b86b68 in PyFile_WriteObject () from /usr/lib/libpython2.7.so.1.0
#6 0x00007fd675ac52d7 in PyErr_Display () from /usr/lib/libpython2.7.so.1.0
#7 0x00007fd675ac587c in ?? () from /usr/lib/libpython2.7.so.1.0
#8 0x00007fd675ace5d5 in PyEval_EvalFrameEx () from /usr/lib/libpython2.7.so.1.0
#9 0x00007fd675a8e6b5 in PyEval_EvalCodeEx () from /usr/lib/libpython2.7.so.1.0
#10 0x00007fd675a8e86d in ?? () from /usr/lib/libpython2.7.so.1.0
#11 0x00007fd675b73083 in PyObject_Call () from /usr/lib/libpython2.7.so.1.0
#12 0x00007fd675b739d7 in PyEval_CallObjectWithKeywords () from /usr/lib/libpython2.7.so.1.0
#13 0x00007fd675ac5970 in PyErr_PrintEx () from /usr/lib/libpython2.7.so.1.0
#14 0x00007fd675a8f71c in PyRun_SimpleStringFlags () from /usr/lib/libpython2.7.so.1.0
#15 0x000000000057ccff in ?? ()
#16 0x000000000057ced8 in ex_python ()
#17 0x000000000047ffbd in do_cmdline ()
#18 0x0000000000458d92 in ?? ()
#19 0x00000000004596f2 in ?? ()
#20 0x0000000000459ad2 in call_vim_function ()
#21 0x0000000000440601 in ?? ()
#22 0x0000000000440e79 in ?? ()
#23 0x000000000044599d in edit ()
#24 0x00000000004e0ecc in ?? ()
#25 0x00000000004e909c in normal_cmd ()
#26 0x000000000058804f in main_loop ()
#27 0x0000000000429c2a in main ()

Thread 2 (Thread 0x7fd66a92a700 (LWP 11283)):
#0 0x00007fd675f38148 in pthread_join (threadid=140558993356544, thread_return=0x0) at pthread_join.c:89
#1 0x00007fd6714329fc in llvm::llvm_execute_on_thread(void ()(void), void*, unsigned int) () from libclang.so
#2 0x00007fd67141ce5d in llvm::CrashRecoveryContext::RunSafelyOnThread(void ()(void), void*, unsigned int) ()

from libclang.so
#3 0x00007fd6713da814 in clang::RunSafely(llvm::CrashRecoveryContext&, void ()(void), void*, unsigned int) ()

from libclang.so
#4 0x00007fd6713eb354 in clang_codeCompleteAt () from libclang.so
#5 0x00007fd6722cfea4 in ffi_call_unix64 () from /usr/lib/python2.7/lib-dynload/_ctypes.so
#6 0x00007fd6722cf8c5 in ffi_call () from /usr/lib/python2.7/lib-dynload/_ctypes.so
#7 0x00007fd6722c02c2 in _ctypes_callproc () from /usr/lib/python2.7/lib-dynload/_ctypes.so
#8 0x00007fd6722c0aa2 in ?? () from /usr/lib/python2.7/lib-dynload/_ctypes.so
#9 0x00007fd675b73083 in PyObject_Call () from /usr/lib/libpython2.7.so.1.0
#10 0x00007fd675acd1fd in PyEval_EvalFrameEx () from /usr/lib/libpython2.7.so.1.0
#11 0x00007fd675a8e6b5 in PyEval_EvalCodeEx () from /usr/lib/libpython2.7.so.1.0
#12 0x00007fd675ace650 in PyEval_EvalFrameEx () from /usr/lib/libpython2.7.so.1.0
#13 0x00007fd675acf37b in PyEval_EvalFrameEx () from /usr/lib/libpython2.7.so.1.0
#14 0x00007fd675acf37b in PyEval_EvalFrameEx () from /usr/lib/libpython2.7.so.1.0
#15 0x00007fd675acf37b in PyEval_EvalFrameEx () from /usr/lib/libpython2.7.so.1.0
#16 0x00007fd675a8e6b5 in PyEval_EvalCodeEx () from /usr/lib/libpython2.7.so.1.0
#17 0x00007fd675a8e86d in ?? () from /usr/lib/libpython2.7.so.1.0
#18 0x00007fd675b73083 in PyObject_Call () from /usr/lib/libpython2.7.so.1.0
#19 0x00007fd675b573cf in ?? () from /usr/lib/libpython2.7.so.1.0
#20 0x00007fd675b73083 in PyObject_Call () from /usr/lib/libpython2.7.so.1.0
#21 0x00007fd675b739d7 in PyEval_CallObjectWithKeywords () from /usr/lib/libpython2.7.so.1.0
#22 0x00007fd675ac5cb2 in ?? () from /usr/lib/libpython2.7.so.1.0
#23 0x00007fd675f36e9a in start_thread (arg=0x7fd66a92a700) at pthread_create.c:308
#24 0x00007fd6751483fd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#25 0x0000000000000000 in ?? ()

Thread 4 (Thread 0x7fd670de7700 (LWP 11284)):
#0 0x00007fd67513c967 in unlink () at ../sysdeps/unix/syscall-template.S:82
#1 0x00007fd6750b1e09 in __GI_remove (file=0x7fd66709b1f0 "/tmp/preamble-b3350d.pch") at ../sysdeps/posix/remove.c:35
#2 0x00007fd67142e197 in llvm::sys::fs::remove(llvm::Twine const&, bool&) () from libclang.so
#3 0x00007fd6715a9c73 in cleanupOnDiskMapAtExit() () from libclang.so
#4 0x00007fd67508f901 in __run_exit_handlers (status=1, listp=0x7fd67540d688, run_list_atexit=true) at exit.c:78
#5 0x00007fd67508f985 in __GI_exit (status=) at exit.c:100
#6 0x0000000000504a89 in mch_exit ()
#7
#8 0x00007fd6715a651a in clang::ASTUnit::CodeComplete(llvm::StringRef, unsigned int, unsigned int, std::__1::pair<std::__1::basic_string<char, std::__1::char_traits, std::__1::allocator >, llvm:

:PointerUnion<char const*, llvm::MemoryBuffer const*> >, unsigned int, bool, bool, bool, clang::CodeCompleteConsumer&, clang::DiagnosticsEngine&, clang::LangOptions&, clang::SourceManager&, clang::FileManag
er&, llvm::SmallVectorImplclang::StoredDiagnostic&, llvm::SmallVectorImpl<llvm::MemoryBuffer const>&) ()
from libclang.so
#9 0x00007fd6713eaf07 in clang_codeCompleteAt_Impl () from libclang.so
#10 0x00007fd67141cd98 in llvm::CrashRecoveryContext::RunSafely(void ()(void), void*) () from libclang.so
#11 0x00007fd67141ce94 in RunSafelyOnThread_Dispatch(void*) () from libclang.so
#12 0x00007fd671432a1a in ExecuteOnThread_Dispatch(void*) () from libclang.so
#13 0x00007fd675f36e9a in start_thread (arg=0x7fd670de7700) at pthread_create.c:308
#14 0x00007fd6751483fd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#15 0x0000000000000000 in ?? ()

Thread 3 (Thread 0x7fd673adb700 (LWP 11204)):
#0 0x00007fd675141763 in select () at ../sysdeps/unix/syscall-template.S:82
#1 0x00007fd6757f398a in ?? () from /usr/lib/libtcl8.5.so.0
#2 0x00007fd675f36e9a in start_thread (arg=0x7fd673adb700) at pthread_create.c:308
#3 0x00007fd6751483fd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#4 0x0000000000000000 in ?? ()

vimrc settings:

let g:clang_auto_select=1
let g:clang_complete_auto=1
let g:clang_complete_copen=1
let g:clang_hl_errors=1
let g:clang_periodic_quickfix=0
let g:clang_snippets=1
let g:clang_snippets_engine="clang_complete"
let g:clang_conceal_snippets=1
let g:clang_exec="clang"
let g:clang_user_options=""
let g:clang_use_library=1
let g:clang_complete_library=0
let g:clang_library_path = '/path/to/lib'
let g:clang_compilation_database = '/path/to/db'
let g:clang_sort_algo="priority"
let g:clang_complete_macros=1
let g:clang_complete_patterns=0
let g:clang_debug = 0

Is this a known issue? If there is fix, could you please point me to it?

Please let me know if you need any other information.

thx

Vikas.