That unfortunate moment when you hit a bug and find a TODO in the source code for that issue.
Related Posts
On the challenge of writing accurate source spans on Unicode source code: https://reedmullanix.com/posts/unicode-source-spans.html
Also (see footnotes) a fair number of LSP clients assume UTF-8 despite early versions of LSP mandating UTF-16!
Chekhov's repro: If a line of code is included in a bug report, it should contribute to the debugging somewhere.
"After I linked difftastic, one of my friends immediately used difftastic to find a stealthy bug, five stars!"
https://www.scannedinavian.com/tools-built-on-tree-sitters-concrete-syntax-trees.html