SimTK: OpenSim: [#1989] In BushingForce, body_1 and body_2 are optional parameters, can lead to segfault in python wrapping

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Date:
2014-02-27 22:57

Priority:
3

State:
Open

Submitted by:
Christopher Dembia (chrisdembia)

Assigned to:
Nobody (None)

Summary:
In BushingForce, body_1 and body_2 are optional parameters, can lead to segfault in python wrapping

Detailed description
I tried to do the following in python wrapping. model.addForce(opensim.BushingForce()) This caused an noninformative segfault. The issue was that I did not set the body_1, body_2 properties of the BushingForce. These are optional properties that are not initialized until they're set: OpenSim_DECLARE_OPTIONAL_PROPERTY(body_1, ... So that an informative error message can be generated, perhaps these should not be optional properties, and should instead be initialized to "" or something.
I tried to do the following in python wrapping. model.addForce(opensim.BushingForce()) This caused an noninformative segfault. The issue was that I did not set the body_1, body_2 properties of the BushingForce. These are optional properties that are not initialized until they're set: OpenSim_DECLARE_OPTIONAL_PROPERTY(body_1, ... So that an informative error message can be generated, perhaps these should not be optional properties, and should instead be initialized to "" or something.

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