Networkx exception: Node is not in the digraph

Hi guys,

I am having a problem with one binary, while trying to generate its Control Flow Graph with CFGFast. Below you can find the trace:

First I get this error:
```
Traceback (most recent call last):
File "/usr/local/lib/python2.7/site-packages/angr/engines/vex/engine.py", line 223, in _handle_irsb
self._handle_statement(state, successors, stmt)
File "/usr/local/lib/python2.7/site-packages/angr/engines/vex/engine.py", line 330, in _handle_statement
s_stmt = translate_stmt(stmt, state)
File "/usr/local/lib/python2.7/site-packages/angr/engines/vex/statements/__init__.py", line 29, in translate_stmt
s.process()
File "/usr/local/lib/python2.7/site-packages/angr/engines/vex/statements/base.py", line 20, in process
self._execute()
File "/usr/local/lib/python2.7/site-packages/angr/engines/vex/statements/wrtmp.py", line 6, in _execute
data = self._translate_expr(self.stmt.data)
File "/usr/local/lib/python2.7/site-packages/angr/engines/vex/statements/base.py", line 27, in _translate_expr
e = translate_expr(expr, self.state)
File "/usr/local/lib/python2.7/site-packages/angr/engines/vex/expressions/__init__.py", line 14, in translate_expr
e.process()
File "/usr/local/lib/python2.7/site-packages/angr/engines/vex/expressions/base.py", line 36, in process
self._execute()
File "/usr/local/lib/python2.7/site-packages/angr/engines/vex/expressions/op.py", line 12, in _execute
exprs = self._translate_exprs(self._expr.args)
File "/usr/local/lib/python2.7/site-packages/angr/engines/vex/expressions/base.py", line 80, in _translate_exprs
return [ self._translate_expr(e) for e in exprs ]
File "/usr/local/lib/python2.7/site-packages/angr/engines/vex/expressions/base.py", line 73, in _translate_expr
e = translate_expr(expr, self.state)
File "/usr/local/lib/python2.7/site-packages/angr/engines/vex/expressions/__init__.py", line 14, in translate_expr
e.process()
File "/usr/local/lib/python2.7/site-packages/angr/engines/vex/expressions/base.py", line 36, in process
self._execute()
File "/usr/local/lib/python2.7/site-packages/angr/engines/vex/expressions/rdtmp.py", line 11, in _execute
self.expr = self.state.scratch.tmp_expr(self._expr.tmp)
File "/usr/local/lib/python2.7/site-packages/angr/state_plugins/scratch.py", line 95, in tmp_expr
'slicing.' % tmp
SimValueError: VEX temp variable 5 does not exist. This is usually the result of an incorrect slicing.
```

Than a bunch of Warnings of this type:
WARNING | 2017-09-22 11:47:20,758 | angr.state_plugins.abstract_memory | map_region() is not yet supported by SimAbstractMmeory.
WARNING | 2017-09-22 11:47:23,234 | angr.engines.successors | Exit state has over 257 possible solutions. Likely unconstrained; skipping.

And in the end this error from Networkx:
```
Traceback (most recent call last):
File "test.py", line 5, in
a = convertbinary.generateCFG(b, 900)
File "/service/convertbinary.py", line 23, in generateCFG
cfg = project.analyses.CFG()
File "/usr/local/lib/python2.7/site-packages/angr/analyses/analysis.py", line 96, in make_analysis
oself.__init__(*args, **kwargs)
File "/usr/local/lib/python2.7/site-packages/angr/analyses/cfg/cfg.py", line 58, in __init__
CFGFast.__init__(self, **kwargs)
File "/usr/local/lib/python2.7/site-packages/angr/analyses/cfg/cfg_fast.py", line 810, in __init__
self._analyze()
File "/usr/local/lib/python2.7/site-packages/angr/analyses/forward_analysis.py", line 507, in _analyze
self._post_analysis()
File "/usr/local/lib/python2.7/site-packages/angr/analyses/cfg/cfg_fast.py", line 1360, in _post_analysis
self._remove_redundant_overlapping_blocks()
File "/usr/local/lib/python2.7/site-packages/angr/analyses/cfg/cfg_fast.py", line 2637, in _remove_redundant_overlapping_blocks
self.graph.remove_node(b)
File "/usr/local/lib/python2.7/site-packages/networkx/classes/digraph.py", line 461, in remove_node
raise NetworkXError("The node %s is not in the digraph."%(n,))
networkx.exception.NetworkXError: The node is not in the digraph.
```

I am using latest version of angr with networkx version 1.11. Any idea on what is causing this error?

Thanks,
Gani