merges r29280 from trunk into ruby_1_9_2 and adds a minimal regression

test.
--
* lib/tracer.rb: count only non-internal libraries in stack trace,
  ignoring custom_require.  [ruby-core:31858]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_1_9_2@29914 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

ChangeLog

@@ -1,3 +1,8 @@
+Fri Sep 17 08:30:27 2010  Nobuyoshi Nakada  <nobu@ruby-lang.org>
+
+	* lib/tracer.rb: count only non-internal libraries in stack trace,
+	  ignoring custom_require.  [ruby-core:31858]
+
 Thu Sep 16 08:30:28 2010  Nobuyoshi Nakada  <nobu@ruby-lang.org>
 
 	* sprintf.c (rb_f_sprintf): fix rdoc.  pointed out by Tomoyuki

lib/tracer.rb

@@ -190,6 +190,6 @@ if $0 == __FILE__
   ARGV.shift
   Tracer.on
   require $0
-elsif caller.size <= 1 
+elsif caller.count {|bt| /\A<internal:[^<>]+>:/ !~ bt} <= 1
   Tracer.on
 end

test/test_tracer.rb

@@ -0,0 +1,20 @@
+require 'test/unit'
+require_relative 'ruby/envutil'
+
+class TestTracer < Test::Unit::TestCase
+  include EnvUtil
+
+  def test_work_with_e
+    assert_in_out_err(%w[-rtracer -e 1]) do |(*lines),|
+      case lines.size
+      when 2
+        assert_match %r[#0:<internal:lib/rubygems/custom_require>:\d+:Kernel:<: -], lines[0]
+      when 1
+        # do nothing
+      else
+        flunk 'unexpected output from `ruby -rtracer -e 1`'
+      end
+      assert_equal "#0:-e:1::-: 1", lines[1]
+    end
+  end
+end

version.h

@@ -1,5 +1,5 @@
 #define RUBY_VERSION "1.9.2"
-#define RUBY_PATCHLEVEL 46
+#define RUBY_PATCHLEVEL 47
 #define RUBY_VERSION_MAJOR 1
 #define RUBY_VERSION_MINOR 9
 #define RUBY_VERSION_TEENY 1