I've heard that null pointers were greatly regretted. My favorite example of their issue is that there exists embedded devices with memory at address 0. Even wo

I've heard that null pointers were greatly regretted. My favorite example of their issue is that there exists embedded devices with memory at address 0. Even worse, it's ITCM (instruction memory) so one might think that on startup you may want to copy a block of program code into it for lower latency (such as ISRs). Maybe you want to point the DMA to that while the CPU is busy initializing other things. But you can't. Because the driver code checks for... A null pointer where that's defined as 0. Also, anything that doesn't do a null check (failed malloc anyone?) ends up writing to that memory. Good luck if you need it for something. Similarly when I was writing a simulator for the chip I ended up commenting out that block for a lot of it because it was masking so many issues as other issues. Unsure if newer generations moved it to somewhere else.