ValueError: Can't tell my size without an arch!

[flobotics]

hi, i got "angr-management nightly preview 20200811.1" installed, when i open it, load a binary ("simple" from https://github.com/0xmilkmix/sandbox/tree/master/angr ) , then select the address 0x400785 in the "Disassembly" view, and right-click and select "Execute Symbolically". In the "New State" pop-up, i let everything default and click "OK". Then in the "Symbolic Execution" view, i click on "explore" button, then in the "console" view, this output appears:

Jupyter QtConsole 4.7.5 Python 3.8.5 (default, Jul 21 2020, 12:22:34) Type 'copyright', 'credits' or 'license' for more information IPython 7.17.0 -- An enhanced Interactive Python. Type '?' for help. Exception while running job "Simulation manager exploring": Traceback (most recent call last): File "angrmanagement/data/instance.py", line 273, in _worker File "angrmanagement/data/jobs/simgr_explore.py", line 15, in run File "angr/sim_manager.py", line 239, in explore File "angr/sim_manager.py", line 261, in run File "angr/misc/hookset.py", line 75, in __call__ File "angr/exploration_techniques/explorer.py", line 96, in step File "angr/misc/hookset.py", line 80, in __call__ File "angr/sim_manager.py", line 346, in step File "angr/sim_manager.py", line 383, in step_state File "angr/sim_manager.py", line 422, in successors File "angr/factory.py", line 60, in successors File "angr/engines/vex/light/slicing.py", line 19, in process File "angr/engines/engine.py", line 149, in process File "angr/engines/failure.py", line 21, in process_successors File "angr/engines/syscall.py", line 18, in process_successors File "angr/engines/hook.py", line 61, in process_successors File "angr/engines/procedure.py", line 37, in process_procedure File "angr/sim_procedure.py", line 236, in execute File "angr/sim_procedure.py", line 384, in ret File "angr/calling_conventions.py", line 709, in teardown_callsite File "angr/calling_conventions.py", line 767, in set_return_val File "angr/calling_conventions.py", line 464, in return_val File "angr/sim_type.py", line 336, in size ValueError: Can't tell my size without an arch!

How can i setup arch ?

[github-actions[bot]]

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[rhelmot]

This seems to have been fixed at some point.