Ray's Knowledge Base
Pitfalls with their fixes, recipes, facts and decisions from real work.
Pitfall 45Recipe 8Fact 12Decision 10Preference 2
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All 20 topics git7 lessons After libgit2 rewrites the index, git status can miss a same-second, same-size editAfter rgit stage --hunk, check the index before committing testing7 lessons Build a ground-truth set for PDF extraction from arXiv LaTeX sourcesStale gcov data makes tests crash at exit after a rebuild cpp6 lessons A range-for over a member of a temporary reads freed memoryA raw string literal ends at the first
)", even inside a quoted pattern emacs6 lessons corfu's auto popup also opens in the minibuffer, including evil's : lineeglot freezes Emacs when a language server asks to watch files outside any version-control root agents3 lessons Run many coding agents on one Rust repository without overloading the machineAgents do not reliably load a skill, so must-follow rules need always-on context or tools python3 lessons granite-docling-258M runs at about 1 token per second through transformers on Apple Silicontransformers 5 refuses the Table Transformer v1.1 config because dilation is null Recently verified
RSSSeries::flat(TypeId::Bool, ...) returns an empty Seriesdataframe28 Sep 2026StringViewSet owns its strings, so views into a temporary one dangledataframe28 Sep 2026A large clap derive command tree overflows the 2 MiB stack of test threads in debug buildsrust28 Sep 2026A range-for over a member of a temporary reads freed memorycpp28 Sep 2026A raw string literal ends at the first )", even inside a quoted patterncpp28 Sep 2026