> Anyway, I got inspired and debugged the issue further myself
[...]
> I pushed a fix like that to gerrit, please have a look:
> https://gerrit.fd.io/r/c/vpp/+/27416

Great. In addition to that, maybe we should change 0 to be invalid to catch 
those errors more easily, eg. https://gerrit.fd.io/r/c/vpp/+/27443

> By the way, do you think address sanitizer could be used to find this
> kind of bugs?

ASan, no, but MSan should https://clang.llvm.org/docs/MemorySanitizer.html
Not tried on VPP yet but it would be a cool addition for sure 😊

ben

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