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Previously, if you had a pointer to multiple array elements and tried to write to it at comptime, it was incorrectly treated as a pointer to one specific array value, leading to an assertion down the line. If we try to mutate a value at an elem_ptr larger than the element type, we need to perform a modification to multiple array elements. This solution isn't ideal, since it will result in storePtrVal serializing the whole array, modifying the relevant parts, and storing it back. Ideally, it would only take the required elements. However, this change would have been more complex, and this is a fairly rare operation (nobody ever ran into the bug before after all), so it doesn't matter all that much.