some specific values can reliably segfault clamp() about roaringbitmap

[linde]

this would probably be helpful ...

$ python3  -X faulthandler
Python 3.7.0 (default, Jul  6 2018, 09:13:43) 
[Clang 9.1.0 (clang-902.0.39.2)] on darwin
Type "help", "copyright", "credits" or "license" for more information.
>>> from roaringbitmap import RoaringBitmap
>>> 
>>> rbm = RoaringBitmap()
>>> rbm.add(3995084765)
>>> rbm.clamp(0,8388607)
Fatal Python error: Segmentation fault

Current thread 0x00007fff989bf380 (most recent call first):
  File "<stdin>", line 1 in <module>
Segmentation fault: 11

[andreasvc]

Thanks for the report. At first glance it seems like a challenge to debug... Requires digging around with gdb.

[linde]

nice, thanks for the quick turnaround. also appreciate the unit test for the issue!

[linde]

verified works for me as well now, thanks!