Glossary: "Undefined behavior" does not appear #157
Description
UB is an important term that should most likely mentioned/defined in the glossary and probably referenced from other parts (e.g. unsafe related terms).
There is a mention in the "General" section which may be considered a definition (it is not in italic, though). But in that case, it is unclear what it exactly means, and it talks about "unbounded errors", which isn't defined or used anywhere else either.