Comment 7 for bug 367545

Do you prefer large outputs, such as that below, in a comment or an attachment?
I will keep the gdb session running (since it takes a while to get to the error), so feel free to ask me to investigate further.

(gdb) run /usr/bin/bzr branch ~/test.bzr.2/data test2
Starting program: /usr/bin/python /usr/bin/bzr branch ~/test.bzr.2/data test2
[Thread debugging using libthread_db enabled]
- Fetching revisions:Get stream source
Program received signal SIGSEGV, Segmentation fault.
0x00007ffff2306de8 in create_delta_index ()
   from /usr/lib/python2.6/dist-packages/bzrlib/_groupcompress_pyx.so
(gdb) bt
#0 0x00007ffff2306de8 in create_delta_index ()
   from /usr/lib/python2.6/dist-packages/bzrlib/_groupcompress_pyx.so
#1 0x00007ffff230546c in ?? ()
   from /usr/lib/python2.6/dist-packages/bzrlib/_groupcompress_pyx.so
#2 0x00000000004a290d in PyEval_EvalFrameEx ()
#3 0x00000000004a40e0 in PyEval_EvalCodeEx ()
#4 0x00000000004a245f in PyEval_EvalFrameEx ()
#5 0x00000000004a40e0 in PyEval_EvalCodeEx ()
#6 0x00000000004a245f in PyEval_EvalFrameEx ()
#7 0x00000000005299ce in ?? ()
#8 0x000000000049e0ee in PyEval_EvalFrameEx ()
#9 0x00000000004a2e47 in PyEval_EvalFrameEx ()
#10 0x00000000004a40e0 in PyEval_EvalCodeEx ()
#11 0x00000000004a245f in PyEval_EvalFrameEx ()
#12 0x00000000004a2e47 in PyEval_EvalFrameEx ()
#13 0x00000000004a2e47 in PyEval_EvalFrameEx ()
#14 0x00000000004a2e47 in PyEval_EvalFrameEx ()
#15 0x00000000004a40e0 in PyEval_EvalCodeEx ()
#16 0x000000000052bf2d in ?? ()
#17 0x000000000041d6e7 in PyObject_Call ()
#18 0x00000000004254ff in ?? ()
#19 0x000000000041d6e7 in PyObject_Call ()
#20 0x000000000047068e in ?? ()
---Type <return> to continue, or q <return> to quit---
#21 0x000000000046b92f in ?? ()
#22 0x000000000041d6e7 in PyObject_Call ()
#23 0x00000000004a199c in PyEval_EvalFrameEx ()
#24 0x00000000004a40e0 in PyEval_EvalCodeEx ()
#25 0x000000000052bf2d in ?? ()
#26 0x000000000041d6e7 in PyObject_Call ()
#27 0x00000000004a0f31 in PyEval_EvalFrameEx ()
#28 0x00000000004a40e0 in PyEval_EvalCodeEx ()
#29 0x00000000004a245f in PyEval_EvalFrameEx ()
#30 0x00000000004a40e0 in PyEval_EvalCodeEx ()
#31 0x00000000004a245f in PyEval_EvalFrameEx ()
#32 0x00000000004a40e0 in PyEval_EvalCodeEx ()
#33 0x00000000004a245f in PyEval_EvalFrameEx ()
#34 0x00000000004a40e0 in PyEval_EvalCodeEx ()
#35 0x000000000052bf2d in ?? ()
#36 0x000000000041d6e7 in PyObject_Call ()
#37 0x00000000004a0f31 in PyEval_EvalFrameEx ()
#38 0x00000000004a40e0 in PyEval_EvalCodeEx ()
#39 0x000000000052bf2d in ?? ()
#40 0x000000000041d6e7 in PyObject_Call ()
#41 0x00000000004a0f31 in PyEval_EvalFrameEx ()
#42 0x00000000004a40e0 in PyEval_EvalCodeEx ()
#43 0x000000000052bf2d in ?? ()
---Type <return> to continue, or q <return> to quit---
#44 0x000000000041d6e7 in PyObject_Call ()
#45 0x00000000004a0f31 in PyEval_EvalFrameEx ()
#46 0x00000000004a40e0 in PyEval_EvalCodeEx ()
#47 0x000000000052bf2d in ?? ()
#48 0x000000000041d6e7 in PyObject_Call ()
#49 0x00000000004a0f31 in PyEval_EvalFrameEx ()
#50 0x00000000004a40e0 in PyEval_EvalCodeEx ()
#51 0x000000000052be30 in ?? ()
#52 0x000000000041d6e7 in PyObject_Call ()
#53 0x00000000004a0f31 in PyEval_EvalFrameEx ()
#54 0x00000000004a40e0 in PyEval_EvalCodeEx ()
#55 0x000000000052bf2d in ?? ()
#56 0x000000000041d6e7 in PyObject_Call ()
#57 0x00000000004a0f31 in PyEval_EvalFrameEx ()
#58 0x00000000004a40e0 in PyEval_EvalCodeEx ()
#59 0x00000000004a245f in PyEval_EvalFrameEx ()
#60 0x00000000004a2e47 in PyEval_EvalFrameEx ()
#61 0x00000000004a40e0 in PyEval_EvalCodeEx ()
#62 0x00000000004a245f in PyEval_EvalFrameEx ()
#63 0x00000000004a40e0 in PyEval_EvalCodeEx ()
#64 0x00000000004a41b2 in PyEval_EvalCode ()
#65 0x00000000004c33a0 in PyRun_FileExFlags ()
#66 0x00000000004c3564 in PyRun_SimpleFileExFlags ()
---Type <return> to continue, or q <return> to quit---
#67 0x0000000000418ab7 in Py_Main ()
#68 0x00007ffff6fd0abd in __libc_start_main (main=<value optimized out>,
    argc=<value optimized out>, ubp_av=<value optimized out>,
    init=<value optimized out>, fini=<value optimized out>,
    rtld_fini=<value optimized out>, stack_end=0x7fffffffe338)
    at libc-start.c:220
#69 0x0000000000417ca9 in _start ()
(gdb)