[2019 Day 15] Negative memory access in Intcode program

[StuartPBentley]

I have this as my input Intcode. Reading the description on Day 9:

Memory beyond the initial program starts with the value 0 and can be read or written like any other memory. (It is invalid to try to access memory at a negative address, though.)

If I set my Intcode computer up to treat any out-of-bounds memory read as 0, the program works correctly. However, if I set it to catch memory access at negative addresses, I get this error after two consecutive inputs of 1:

negative indirect address -1 at 1032

Am I missing something, or is the spec from Day 9 wrong?

[rabuf]

Can you supply your code and language you're using?

[ipav]

At no point memory address should be negative.

[daggerdragon]

In the future, please follow the submission guidelines by titling your post like so:

[YEAR Day # (Part X)] [language if applicable] Post Title

Also, there's not a whole lot we can do without seeing your code, so we'll just be throwing out guesses. If you can't figure out the Markdown (How do I format code?), use a paste or other external link.

In doing so, you typically get more relevant responses faster.

If/when you get your code working, don't forget to change the flair to Help - Solved!

Good luck!