class ActiveSupport::SyntaxErrorProxy

:nodoc:
source on error pages in development.
source location of the syntax error. That way we can display the error
is to enhance the backtraces on SyntaxError exceptions to include the
This is a class for wrapping syntax errors. The purpose of this class

def backtrace

:nodoc:
source on error pages in development.
source location of the syntax error. That way we can display the error
is to enhance the backtraces on SyntaxError exceptions to include the
This is a class for wrapping syntax errors. The purpose of this class 
def backtrace
  parse_message_for_trace + super
end

def backtrace_locations 

def backtrace_locations
  return nil if super.nil?
  parse_message_for_trace.map { |trace|
    file, line = trace.match(/^(.+?):(\d+).*$/, &:captures) || trace
    BacktraceLocation.new(file, line.to_i, trace)
    # We have to wrap these backtrace locations because we need the
    # spot information to come from the originating exception, not the
    # proxy object that's generating these
  } + super.map { |loc| BacktraceLocationProxy.new(loc, self) }
end

def parse_message_for_trace 

def parse_message_for_trace
  if source_location_eval?
    # If the exception is coming from a call to eval, we need to keep
    # the path of the file in which eval was called to ensure we can
    # return the right source fragment to show the location of the
    # error
    location = __getobj__.backtrace_locations[0]
    ["#{location.path}:#{location.lineno}: #{__getobj__}"]
  else
    __getobj__.to_s.split("\n")
  end
end

def source_location_eval?

Ruby 3.3+ 
def source_location_eval?
  __getobj__.path.start_with?("(eval")
end

def source_location_eval?

3.2 and older versions of Ruby 
def source_location_eval?
  __getobj__.to_s.start_with?("(eval")
end