Konstantin Käfer 16872af889 Avoid pointer arithmetic on null pointer to remove undefined behavior ...

The existing checks triggered undefined behavior when the stack was empty (null pointer). This change avoid this:
* If `stackTop_` and `stackEnd_` are null, it results in a `ptrdiff_t` of `0`
* If `stackTop_` and `stackEnd_` are valid pointers, they produce a `ptrdiff_t` with the remaining size on the stack

2018-10-05 09:26:20 +02:00

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rapidjson

Avoid pointer arithmetic on null pointer to remove undefined behavior

2018-10-05 09:26:20 +02:00