Panic when provided using struct object with null pointer field

PaesslerAG / gval

Expression evaluation in golang

BSD 3-Clause "New" or "Revised" License

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Closed abdularis closed 3 years ago

abdularis commented 3 years ago

Error: panic: reflect: call of reflect.Value.Interface on zero Value [recovered] panic: reflect: call of reflect.Value.Interface on zero Value

after quick reading, I think it has something to do with the usage of reflection, it does not check whether its valid reflect Value or not

abdularis commented 3 years ago

generikvault commented 3 years ago

Hi,

thanks for the finding and solution.

the example in your pull request contains a typed nil value. This breaks the current check.

Typed nil can also occur for slices and maps.

Fixed it together with the same issue in the ? operator.