Everything in C is undefined behavior
6.5 relevance
Score Breakdown
technical depth 9
novelty 6
actionability 5
community 8
strategic 3
personal 5
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Deep dive on undefined behavior in C, high community engagement but not core interest.
Summary
All nontrivial C and C++ code contains undefined behavior (UB), making correct programs impossible, argues a veteran developer. UB includes subtle cases like misaligned pointer access (C23 6.3.2.3) — safe on x86 but deadly on SPARC or Alpha — and compilers assume such UB never occurs, even without optimizations. This 'telephone game' means code that works today may break on future architectures or compiler versions.