Fix merge_requests stuck in cannot_be_merged_rechecking state

app/models/merge_request.rb

@@ -163,7 +163,7 @@ class MergeRequest < ApplicationRecord
   state_machine :merge_status, initial: :unchecked do
     event :mark_as_unchecked do
       transition [:can_be_merged, :checking, :unchecked] => :unchecked
-      transition [:cannot_be_merged, :cannot_be_merged_recheck] => :cannot_be_merged_recheck
+      transition [:cannot_be_merged, :cannot_be_merged_rechecking, :cannot_be_merged_recheck] => :cannot_be_merged_recheck
     end
 
     event :mark_as_checking do
@@ -200,7 +200,7 @@ class MergeRequest < ApplicationRecord
     # rubocop: enable CodeReuse/ServiceClass
 
     def check_state?(merge_status)
-      [:unchecked, :cannot_be_merged_recheck, :checking].include?(merge_status.to_sym)
+      [:unchecked, :cannot_be_merged_recheck, :checking, :cannot_be_merged_rechecking].include?(merge_status.to_sym)
     end
   end
 

spec/models/merge_request_spec.rb

@@ -3352,7 +3352,7 @@ describe MergeRequest do
     describe 'check_state?' do
       it 'indicates whether MR is still checking for mergeability' do
         state_machine = described_class.state_machines[:merge_status]
-        check_states = [:unchecked, :cannot_be_merged_recheck, :checking]
+        check_states = [:unchecked, :cannot_be_merged_recheck, :cannot_be_merged_rechecking, :checking]
 
         check_states.each do |merge_status|
           expect(state_machine.check_state?(merge_status)).to be true