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object of type 'dictionary-keyiterator' has no len()

See original GitHub issue

Hi guys,

I was using angr before without any problems for generating Control Flow Graphs. After I updated the angr libraries, I am having this strange error.

I am running it in python 2.7.12 (as before).

File "....convertbinary.py", line 23, in generateCFG
    cfg = project.analyses.CFG()
  File "/usr/local/lib/python2.7/dist-packages/angr/analyses/analysis.py", line 96, in make_analysis
    oself.__init__(*args, **kwargs)
  File "/usr/local/lib/python2.7/dist-packages/angr/analyses/cfg/cfg.py", line 58, in __init__
    CFGFast.__init__(self, **kwargs)
  File "/usr/local/lib/python2.7/dist-packages/angr/analyses/cfg/cfg_fast.py", line 810, in __init__
    self._analyze()
  File "/usr/local/lib/python2.7/dist-packages/angr/analyses/forward_analysis.py", line 500, in _analyze
    self._analysis_core_baremetal()
  File "/usr/local/lib/python2.7/dist-packages/angr/analyses/forward_analysis.py", line 601, in _analysis_core_baremetal
    self._job_queue_empty()
  File "/usr/local/lib/python2.7/dist-packages/angr/analyses/cfg/cfg_fast.py", line 1287, in _job_queue_empty
    jump_targets = list(set(self._process_indirect_jumps()))
  File "/usr/local/lib/python2.7/dist-packages/angr/analyses/cfg/cfg_fast.py", line 2452, in _process_indirect_jumps
    resolved, targets = resolver.resolve(self, jump.addr, jump.func_addr, block, jump.jumpkind)
  File "/usr/local/lib/python2.7/dist-packages/angr/analyses/cfg/indirect_jump_resolvers/jumptable.py", line 79, in resolve
    if len(preds) != 1:
TypeError: object of type 'dictionary-keyiterator' has no len()

Issue Analytics

State:
Created 6 years ago
Comments:7 (3 by maintainers)

Top GitHub Comments

1reaction

rhelmotcommented, Apr 23, 2018

Yes… we know. We are competent programmers here. this was fixed in a later refactor pretty much by doing that. Also your example has an error, it should be len(list(G.neighbors(0)))

1reaction

DevanshuSavecommented, Apr 23, 2018

You can also use list() to make this work in networkx 2.0 For e.g. len(G.neighbors(0)) gave me an error where, G is a graph object. Simply use len(list(G.neighbors(0))) and it works.