LibreOffice crash

I am currently experimenting with programming LibreOffice through Python/UNO.
One thing I tried is to create a document, not with the loadComponentFromURL call from the desktop, 
but the route via the XLoadable interface,

After setting up the connection, getting the context, servicemanager, desktop, and XSCRIPTCONTEXT,
the following works:

calcdoc = smgr.createInstanceWithContext("com.sun.star.sheet.SpreadsheetDocument", context)
calcdoc.initNew() # or calcdoc.load(....)
sheets = calcdoc.getSheets()
sheet1 = sheets.getByName("Sheet1")

cell = sheet1.getCellByPosition(0,0)
cell.String = "Hello World"

calcdoc.storeAsURL("file:///Users/piet/TEST/LibreOffice/testcalc.ods", ())
calcdoc.close(True)

Of course I could have used
calcdoc = desktop.loadComponentFromURL("private:factory/scalc", "_blank", 0, ()); 
(or with a Hidden=True property)
but I just wanted to experiment with the createInstance version.

Now the above example works perfectly. It creates the spreadsheet, and nothing is shown on the 
screen.

Now when I do this with a Writer document:

textdoc = smgr.createInstanceWithContext("com.sun.star.text.TextDocument", context)

LibreOffice crashes with a segmentation fault. It looks like a null pointer is dereferenced or 
stored into. It seems to be in the event loop. So maybe there is some pointer not properly 
initialized.

Here is part of the crash report (Mac OS X 10.10.2). This happens both with LibreOffice 4.4.1.2 
from the installer package and a self-compiled master version.

Process:               soffice [25385]
Path:                  /Users/USER/Downloads/*/LibreOfficeDev.app/Contents/MacOS/soffice
Identifier:            org.libreoffice.script
Version:               4.5.0 (0)
Code Type:             X86-64 (Native)
Parent Process:        bash [71305]
Responsible:           Terminal [71161]
User ID:               501

Date/Time:             2015-03-26 11:23:20.020 +0100
OS Version:            Mac OS X 10.10.2 (14C1510)
Report Version:        11
Anonymous UUID:        0AEBB0CD-ADAB-A830-FE6A-DB114A5C4135

Sleep/Wake UUID:       6AC2711A-D840-4BA5-9661-4545A1C4ABDB

Time Awake Since Boot: 900000 seconds
Time Since Wake:       8400 seconds

Crashed Thread:        10

Exception Type:        EXC_BAD_ACCESS (SIGSEGV)
Exception Codes:       KERN_INVALID_ADDRESS at 0x0000000000000000

VM Regions Near 0:
--> 
    __TEXT                 000000010feff000-000000010ff00000 [    4K] r-x/rwx SM=COW  
/Users/USER/Downloads/*/LibreOfficeDev.app/Contents/MacOS/soffice

Thread 0:: Dispatch queue: com.apple.main-thread
0   libsystem_kernel.dylib              0x00007fff93f494de mach_msg_trap + 10
1   libsystem_kernel.dylib              0x00007fff93f4864f mach_msg + 55
2   com.apple.CoreFoundation            0x00007fff92a4ab34 __CFRunLoopServiceMachPort + 212
3   com.apple.CoreFoundation            0x00007fff92a49ffb __CFRunLoopRun + 1371
4   com.apple.CoreFoundation            0x00007fff92a49858 CFRunLoopRunSpecific + 296
5   com.apple.HIToolbox                 0x00007fff92df2aef RunCurrentEventLoopInMode + 235
6   com.apple.HIToolbox                 0x00007fff92df286a ReceiveNextEventCommon + 431
7   com.apple.HIToolbox                 0x00007fff92df26ab 
_BlockUntilNextEventMatchingListInModeWithFilter + 71
8   com.apple.AppKit                    0x00007fff87bbcf81 _DPSNextEvent + 964
9   com.apple.AppKit                    0x00007fff87bbc730 -[NSApplication 
nextEventMatchingMask:untilDate:inMode:dequeue:] + 194
10  libvcllo.dylib                      0x0000000111f80ee6 AquaSalInstance::Yield(bool, bool) + 1094
11  libvcllo.dylib                      0x0000000111f0e0ca Application::Yield() + 74
12  libvcllo.dylib                      0x0000000111f0e065 Application::Execute() + 37
13  libsofficeapp.dylib                 0x000000010ff7ea75 desktop::Desktop::Main() + 7573
14  libvcllo.dylib                      0x0000000111f11812 ImplSVMain() + 50
15  libvcllo.dylib                      0x0000000111f808b4 
AquaSalInstance::handleAppDefinedEvent(NSEvent*) + 84
16  libvcllo.dylib                      0x0000000111fb65b1 -[VCL_NSApplication sendEvent:] + 321
17  com.apple.AppKit                    0x00007fff87bb0608 -[NSApplication run] + 711
18  com.apple.AppKit                    0x00007fff87b9ba14 NSApplicationMain + 1832
19  libvcllo.dylib                      0x0000000111f7fc09 ImplSVMainHook(int*) + 329
20  libvcllo.dylib                      0x0000000111f123fa SVMain() + 26
21  libsofficeapp.dylib                 0x000000010ffa9bc0 soffice_main + 224
22  org.libreoffice.script              0x000000010fefff20 main + 16
23  libdyld.dylib                       0x00007fff86dc25c9 start + 1

-- 
Piet van Oostrum <piet@vanoostrum.org>
WWW: http://pietvanoostrum.com/
PGP key: [8DAE142BE17999C4]