ActionView::Template::Error: undefined method `total_count' for []:Array

Created by @rymai.

https://sentry.gitlap.com/gitlab/gitlabcom/issues/13630/

NoMethodError: undefined method `total_count' for []:Array
  lib/gitlab/elastic/project_search_results.rb:50:in `commits_count'
    @commits_count ||= commits.total_count
  lib/gitlab/metrics/instrumentation.rb:155:in `block in commits_count'
    trans.method_call_for(#{label.to_sym.inspect}).measure { super }
  lib/gitlab/metrics/method_call.rb:23:in `measure'
    retval = yield
  lib/gitlab/metrics/instrumentation.rb:155:in `commits_count'
    trans.method_call_for(#{label.to_sym.inspect}).measure { super }
  app/views/search/_category.html.haml:37:in `block in _app_views_search__category_html_haml__1971640003665015742_70328335303060'
    = @search_results.commits_count
...
(148 additional frame(s) were not displayed)

ActionView::Template::Error: undefined method `total_count' for []:Array

/cc @vsizov

Moved from gitlab-org/gitlab-ce#23592

Reassigned to @vsizov

Milestone changed to %8.13

Added regression label

Stack trace is not really informative but according to the code it's clear that you can get this exception when do search inside a project, for non-default branch. Reproduced.

Mentioned in merge request !811 (merged)

https://gitlab.com/gitlab-org/gitlab-ee/merge_requests/811

Status changed to closed by merge request !811 (merged)

Mentioned in commit 964f7110

Mentioned in commit c09d2737

Doh, this wasn't labeled Pick into Stable.

Added ~149424 label

Removed ~149424 label

Mentioned in issue #1049 (closed)

mentioned in merge request gitlab-foss!14785

mentioned in commit d9336bb9