Function relloc 

pub fn relloc(
    ptr: *mut u8,
    new_size: usize,
) -> Result<*mut u8, ReallocationError>

Reallocates memory allocated by alloc.

Errors

• AllocationError if alloc() fails
• DeallocationError if free(ptr) fails
• FreeFailedTwice if free(ptr) fails and freeing the newly allocate pointer also fails
• ImproperAlignment if ptr is not properly aligned
• InvalidPointer if ptr was not allocated by alloc or is invalid
• UseAfterFree if you try to realloc a freed pointer