Script to trigger the (possible) Dragonfly bug on a Mastodon account.
If this doesn't find any problems within the first limit=90 posts on your home timeline you can step back further by adjusting the first curl command in the script.
#!/bin/sh
#
# Assumes
# - curl and jq are installed
# - $TOKEN is your account's bearer token
# Fetch the most recent IDs of posts in the home timeline and save to ids.txt
curl -s -H "Authorization: Bearer $TOKEN" https://mastodon.social/api/v1/timelines/home?limit=90 | jq '[.[].id]' > ids.txt
# Process each ID, and try to fetch the home timeline with the ID as the
# min_id value. If any of them return 0 results then it's suspect.
#
# Note that the first ID was just fetched as the first ID in the user's
# timeline, so it may legitimately have 0 results when used as min_id.
for id in $(jq -r -c '.[]' < ids.txt); do
length=$(curl -s -H "Authorization: Bearer $TOKEN" https://mastodon.social/api/v1/timelines/home?min_id=$id | jq length)
if [ "$length" -eq "0" ]; then
echo "$id is suspect"
fi
done