[COUCHDB-3240] latest=true fails when the specified rev belongs to multiple branches

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Won't Fix
• Affects Version/s: 2.0.0, 1.6.1
• Component/s: Database Core
• Assignee: Unassigned
• Reporter: Will Holley
• Created: 18/Nov/16 17:27
• Updated: 02/Sep/18 07:07
• Resolved: 02/Sep/18 07:07

Description

Using a document with a revision tree:

	2-b1
     /
1-a 
     \
	2-b2

GET /mydb/mydoc?rev=1-a&latest=true fails with a 500 error. This occurs on CouchDB 1.6 and 2.0.

To reproduce:

$ export COUCH_HOST="http://127.0.0.1:15984"

$ curl -XPUT "$COUCH_HOST/rev_test"
{"ok":true}

$ curl "$COUCH_HOST/rev_test/_bulk_docs" -H "Content-Type:application/json" -XPOST -d @docs.json
[]

$ curl -H "Accept:application/json" "$COUCH_HOST/rev_test/mydoc?rev=1-a&latest=true"
{"error":"case_clause","reason":"{ok,[{ok,{doc,<<\"mydoc\">>,\n              {2,[<<\"b1\">>,<<\"a\">>]},\n              {[{<<\"value\">>,<<\"x-winning\">>}]},\n              [],false,[]}},\n     {ok,{doc,<<\"mydoc\">>,\n              {2,[<<\"b2\">>,<<\"a\">>]},\n              {[{<<\"value\">>,<<\"x-losing\">>}]},\n              [],false,[]}}]}","ref":2757334056}