{"action":"created","comment":{"url":"https://api.github.com/repos/cockroachdb/cockroach/pulls/comments/43497594","id":43497594,"diff_hunk":"@@ -67,7 +72,10 @@ func (rs rSpan) intersect(desc *roachpb.RangeDescriptor) rSpan {\n // overhead in the common case of a batch which never needs truncation but is\n // less magical.\n func truncate(br *roachpb.BatchRequest, desc *roachpb.RangeDescriptor, rs rSpan) (func(), int, error) {\n-\trs = rs.intersect(desc)\n+\trs, err := rs.intersect(desc)\n+\tif err != nil {\n+\t\treturn func() {}, 0, nil","path":"kv/batch.go","position":null,"original_position":34,"commit_id":"acce09ca05627d450779625c5aed98c2f79aec48","original_commit_id":"7ea7fff9d9c8a1d2bcae07c0c82cc72b0dd769fd","user":{"login":"tschottdorf","id":5076964,"avatar_url":"https://avatars.githubusercontent.com/u/5076964?v=3","gravatar_id":"","url":"https://api.github.com/users/tschottdorf","html_url":"https://github.com/tschottdorf","followers_url":"https://api.github.com/users/tschottdorf/followers","following_url":"https://api.github.com/users/tschottdorf/following{/other_user}","gists_url":"https://api.github.com/users/tschottdorf/gists{/gist_id}","starred_url":"https://api.github.com/users/tschottdorf/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/tschottdorf/subscriptions","organizations_url":"https://api.github.com/users/tschottdorf/orgs","repos_url":"https://api.github.com/users/tschottdorf/repos","events_url":"https://api.github.com/users/tschottdorf/events{/privacy}","received_events_url":"https://api.github.com/users/tschottdorf/received_events","type":"User","site_admin":false},"body":"ah. Forgot that even on error, you want to undo what was already done. The comment in `truncate()` actually mentions that.","created_at":"2015-10-30T12:41:24Z","updated_at":"2015-10-30T12:41:24Z","html_url":"https://github.com/cockroachdb/cockroach/pull/2934#discussion_r43497594","pull_request_url":"https://api.github.com/repos/cockroachdb/cockroach/pulls/2934","_links":{"self":{"href":"https://api.github.com/repos/cockroachdb/cockroach/pulls/comments/43497594"},"html":{"href":"https://github.com/cockroachdb/cockroach/pull/2934#discussion_r43497594"},"pull_request":{"href":"https://api.github.com/repos/cockroachdb/cockroach/pulls/2934"}}},"pull_request":{"url":"https://api.github.com/repos/cockroachdb/cockroach/pulls/2934","id":48960206,"html_url":"https://github.com/cockroachdb/cockroach/pull/2934","diff_url":"https://github.com/cockroachdb/cockroach/pull/2934.diff","patch_url":"https://github.com/cockroachdb/cockroach/pull/2934.patch","issue_url":"https://api.github.com/repos/cockroachdb/cockroach/issues/2934","number":2934,"state":"open","locked":false,"title":"Add a test for rSpec.insersect","user":{"login":"kkaneda","id":8353550,"avatar_url":"https://avatars.githubusercontent.com/u/8353550?v=3","gravatar_id":"","url":"https://api.github.com/users/kkaneda","html_url":"https://github.com/kkaneda","followers_url":"https://api.github.com/users/kkaneda/followers","following_url":"https://api.github.com/users/kkaneda/following{/other_user}","gists_url":"https://api.github.com/users/kkaneda/gists{/gist_id}","starred_url":"https://api.github.com/users/kkaneda/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/kkaneda/subscriptions","organizations_url":"https://api.github.com/users/kkaneda/orgs","repos_url":"https://api.github.com/users/kkaneda/repos","events_url":"https://api.github.com/users/kkaneda/events{/privacy}","received_events_url":"https://api.github.com/users/kkaneda/received_events","type":"User","site_admin":false},"body":"This is also for #2885.\r\n\r\nCurrently `intersect()` returns desc when desc and the span do not overlap. Will fix if this is not the expected behavior here.\n\n<!-- Reviewable:start -->\n[<img src=\"https://reviewable.io/review_button.png\" height=40 alt=\"Review on Reviewable\"/>](https://reviewable.io/reviews/cockroachdb/cockroach/2934)\n<!-- Reviewable:end 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