resolves #4571 pass cursor to preprocessor when processing first line…

… of AsciiDoc table cell (PR #4572)

lib/asciidoctor/table.rb

@@ -303,7 +303,7 @@ def initialize column, cell_text, attributes = {}, opts = {}
       # QUESTION is is faster to check for :: before splitting?
       inner_document_lines = cell_text.split LF, -1
       if (unprocessed_line1 = inner_document_lines[0]).include? '::'
-        preprocessed_lines = (PreprocessorReader.new @document, [unprocessed_line1]).readlines
+        preprocessed_lines = (PreprocessorReader.new @document, [unprocessed_line1], inner_document_cursor).readlines
         unless unprocessed_line1 == preprocessed_lines[0] && preprocessed_lines.size < 2
           inner_document_lines.shift
           inner_document_lines.unshift(*preprocessed_lines) unless preprocessed_lines.empty?

test/tables_test.rb

@@ -1708,6 +1708,36 @@
       assert_match(/included content/, output)
     end
 
+    test 'error about unresolved preprocessor directive on first line of an AsciiDoc table cell should have correct cursor' do
+      begin
+        tmp_include = Tempfile.new %w(include- .adoc)
+        tmp_include_dir, tmp_include_path = File.split tmp_include.path
+        tmp_include.write <<~'EOS'
+        |===
+        |A |B
+
+        |text
+        a|include::does-not-exist.adoc[]
+        |===
+        EOS
+        tmp_include.close
+        input = <<~EOS
+        first
+
+        include::#{tmp_include_path}[]
+
+        last
+        EOS
+        using_memory_logger do |logger|
+          output = convert_string_to_embedded input, safe: :safe, base_dir: tmp_include_dir
+          assert_includes output, %(Unresolved directive in #{tmp_include_path})
+          assert_message logger, :ERROR, %(#{tmp_include_path}: line 5: include file not found: #{File.join tmp_include_dir, 'does-not-exist.adoc'}), Hash
+        end
+      ensure
+        tmp_include.close!
+      end
+    end
+
     test 'cross reference link in an AsciiDoc table cell should resolve to reference in main document' do
       input = <<~'EOS'
       == Some