prevent running out of regexp stack

korny · korny · commit e5624a07e95c · 2015-03-21T03:44:49.000+01:00
diff --git a/lib/coderay/scanners/diff.rb b/lib/coderay/scanners/diff.rb
@@ -100,7 +100,7 @@ def scan_tokens encoder, options
             next
           elsif match = scan(/-/)
             deleted_lines_count += 1
-            if options[:inline_diff] && deleted_lines_count == 1 && (changed_lines_count = 1 + check(/.*(?:\n\-.*)*/).count("\n")) && match?(/(?>.*(?:\n\-.*){#{changed_lines_count - 1}}(?:\n\+.*){#{changed_lines_count}})$(?!\n\+)/)
+            if options[:inline_diff] && deleted_lines_count == 1 && (changed_lines_count = 1 + check(/.*(?:\n\-.*)*/).count("\n")) && changed_lines_count <= 100_000 && match?(/(?>.*(?:\n\-.*){#{changed_lines_count - 1}}(?:\n\+.*){#{changed_lines_count}})$(?!\n\+)/)
               deleted_lines  = Array.new(changed_lines_count) { |i| skip(/\n\-/) if i > 0; scan(/.*/) }
               inserted_lines = Array.new(changed_lines_count) { |i| skip(/\n\+/)         ; scan(/.*/) }
               
