# File lib/linecache.rb, line 273 def trace_line_numbers(filename, reload_on_change=false) fullname = cache(filename, reload_on_change) return nil unless fullname e = @@file_cache[filename] unless e.line_numbers e.line_numbers = TraceLineNumbers.lnums_for_str_array(e.lines) e.line_numbers = false unless e.line_numbers end e.line_numbers end