ZPR: zero page read

A ZPR message indicates that your program is about to read from the zeroth page of memoryŚread from a bad pointer. An SEGV signal can result.

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A ZPR error can be caused by a failure to check return status for a function expected to return a pointer to a structure or an object. If the function returns NULL on failure, accessing a structure field from the NULL pointer leads to a ZPR error.

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