From: "Iñaki Baz Castillo" <ibc@...>
Date: 2010-01-05T05:39:52+09:00
Subject: Why does "warn" print a extra \n ?

Hi, by redirecting $stderr to a logger (Logger or SyslogLogger instance) I've 
realized that Kernel#warn prints an extra \n so the logger is called twice 
(the second one with an empty line).

The "warn" code shows it clearly:

  static VALUE
  rb_warn_m(self, mesg)
      VALUE self, mesg;
  {
      if (!NIL_P(ruby_verbose)) {
          rb_io_write(rb_stderr, mesg);
          rb_io_write(rb_stderr, rb_default_rs);
      }
      return Qnil;
  }


So for example by redirecting $stderr to a Logger instance

  warn "hello"

I get:

  # Logfile created on 2010-01-04 21:32:21 +0100 by logger.rb/20321
  F, [2010-01-04T21:32:38.981099 #22370] FATAL -- : hello
  F, [2010-01-04T21:32:38.981385 #22370] FATAL -- :


Can this be avoided (without rewritting "warn" call)? Thanks.




-- 
Iñaki Baz Castillo <ibc@aliax.net>