Inconsistent holder types cause crash #2052
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Alternatively, one could validate the compatibility of holder types in the constructor of the caster. |
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Rebased onto master. |
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Closing in favor of #1161, which checks only once during the definition of a new wrapper function, while my code checked for each cast. |
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Currently, pybind11 doesn't check for compatibility of holder types. A holder caster accesses the corresponding
value_and_holderslot without any type checking, which can cause serious crashes if the actually requested holder type doesn't match the declared one.The first commit of this PR illustrates the issue as a new test case and the second commit suggests a potential solution: namely storing the
typeinfoof the declared holder and comparing it to the requested one.The failing tests emphasize another issue: there is no dynamic type casting for holders yet.