[I] purge_infos throws a function clause error when there are more infos than purge_info_limit [couchdb]

[via GitHub]

nickva opened a new issue, #5438:
URL: https://github.com/apache/couchdb/issues/5438

   Something like this reproduces it on a q=2 (default) dev cluster on main:
   
   
   ```
   #!/bin/bash
   
   # ./dev/run --admin=adm:pass -n1
   # "http" is httpie (https://httpie.io)
   
   DB=http://adm:pass@127.0.0.1:15984
   
   http -q delete $DB/db
   http -q put $DB/db
   
   
   
   http -b $DB/db/_purged_infos
   # {
   #     "purged_infos": []
   # }
   
   for DOC in {1..3000}; do
      echo "doc ${DOC}"
      REV=$(http put $DB/db/${DOC} a=b | jq -r '.rev')
      http -q post $DB/db/_purge ${DOC}:="[\"${REV}\"]"
   done
   
   # [error] 2025-02-19T18:04:57.333061Z node1@127.0.0.1 <0.18552.4> 187d99d1d9 
rpc couch_db:fold_purge_infos/4 {invalid_start_purge_seq,0} 
[{couch_bt_engine,fold_purge_infos,5,[{file,"src/couch_bt_engine.erl"},{line,611}]},{fabric_rpc,with_db,3,[{file,"src/fabric_rpc.erl"},{line,360}]},{rexi_server,init_p,3,[{file,"src/rexi_server.erl"},{line,141}]}]
   # [error] 2025-02-19T18:04:57.333172Z node1@127.0.0.1 <0.18553.4> 187d99d1d9 
rpc couch_db:fold_purge_infos/4 {invalid_start_purge_seq,0} 
[{couch_bt_engine,fold_purge_infos,5,[{file,"src/couch_bt_engine.erl"},{line,611}]},{fabric_rpc,with_db,3,[{file,"src/fabric_rpc.erl"},{line,360}]},{rexi_server,init_p,3,[{file,"src/rexi_server.erl"},{line,141}]}]
   
   http -b $DB/db/_purged_infos
   # {
   #     "purged_infos": [
   #         {
   #             "id": "doc1",
   #             "revs": [
   #                 "1-4b8a35d3f70a5962f86c6dd06ceb599c"
   #             ]
   #         },
   #         {
   #             "id": "doc2",
   #             "revs": [
   #                 "1-43ca4ac5f035a3057752750224f3c1d1"
   #             ]
   #         }
   #     ], ...
   # }
   
   ```
   


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