Fix RangeError exceptions when referring to issues or merge requests outside of max database values

When using #XYZ in Markdown text, if XYZ exceeds the maximum value of a signed 32-bit integer, we
get an exception when the Markdown render attempts to run `where(iids: XYZ)`. Introduce a method
that will throw out out-of-bounds values.

Closes #18777

1 files changed, 6 insertions, 0 deletions

diff --git a/spec/lib/banzai/filter/merge_request_reference_filter_spec.rb b/spec/lib/banzai/filter/merge_request_reference_filter_spec.rb
index 3185e41fe5c..805acf1c8b3 100644
--- a/spec/lib/banzai/filter/merge_request_reference_filter_spec.rb
+++ b/spec/lib/banzai/filter/merge_request_reference_filter_spec.rb
@@ -38,6 +38,12 @@ describe Banzai::Filter::MergeRequestReferenceFilter, lib: true do
       expect(reference_filter(act).to_html).to eq exp
     end
 
+    it 'ignores out-of-bounds merge request IDs on the referenced project' do
+      exp = act = "Merge !#{Gitlab::Database::MAX_INT_VALUE + 1}"
+
+      expect(reference_filter(act).to_html).to eq exp
+    end
+
     it 'includes a title attribute' do
       doc = reference_filter("Merge #{reference}")
       expect(doc.css('a').first.attr('title')).to eq "Merge Request: #{merge.title}"