[$] A strange BPF error message

Yonghong Song brought a story about tracking down the cause of a strange verifier errormessage to the 2025 Linux Storage, Filesystem, Memory-Management, and BPFSummit. He then presented some possible ways to improve Clang's user experience foranyone running into the same class of error in the future. Toward the end of hisallotted time, he also discussed the problems with optimizations that change thesignature of functions - a problem that Jose Marchesi had also brought up inthe previous session.