class ActionView::Template::Handlers::ERB

def translate_location(spot, _backtrace_location, source)

source location inside the template.
Translate an error location returned by ErrorHighlight to the correct
def translate_location(spot, _backtrace_location, source)
  compiled = spot[:script_lines]
  highlight = compiled[spot[:first_lineno] - 1]&.byteslice((spot[:first_column] - 1)...spot[:last_column])
  return nil if highlight.blank?
  source_lines = source.lines
  lineno_delta = find_lineno_offset(compiled, source_lines, highlight, spot[:first_lineno])
  tokens = ::ERB::Util.tokenize(source_lines[spot[:first_lineno] - lineno_delta - 1])
  column_delta = find_offset(spot[:snippet], tokens, spot[:first_column])
  spot[:first_lineno] -= lineno_delta
  spot[:last_lineno] -= lineno_delta
  spot[:first_column] -= column_delta
  spot[:last_column] -= column_delta
  spot[:script_lines] = source_lines
  spot
rescue NotImplementedError, LocationParsingError
  nil
end