Revert r33924.

* proc.c (rb_proc_arity): Fix Proc#arity in case of optional arguments
  [bug #5694] [rubyspec:b8b259] [rubyspec:184c8100f]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@36411 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

3 files changed, 18 insertions, 9 deletions

diff --git a/ChangeLog b/ChangeLog
index 2dae535c24..abb70b8b53 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,11 @@
+Tue Jul 17 00:18:41 2012  Marc-Andre Lafortune  <ruby-core@marc-andre.ca>
+
+	Revert r33924.
+
+	* proc.c (rb_proc_arity): Fix Proc#arity in case of optional
+	  arguments
+	  [bug #5694] [rubyspec:b8b259] [rubyspec:184c8100f]
+
 Mon Jul 16 23:20:24 2012  Tanaka Akira  <akr@fsij.org>
 
 	* bignum.c (rb_integer_float_cmp): use FIXNUM_MIN and FIXNUM_MAX,
diff --git a/proc.c b/proc.c
index bb7f4a1a25..7edd89215a 100644
--- a/proc.c
+++ b/proc.c
@@ -622,14 +622,14 @@ rb_proc_call_with_block(VALUE self, int argc, VALUE *argv, VALUE pass_procval)
  *  arguments. A <code>proc</code> with no argument declarations
  *  is the same a block declaring <code>||</code> as its arguments.
  *
- *     Proc.new {}.arity          #=>  0
- *     Proc.new {||}.arity        #=>  0
- *     Proc.new {|a|}.arity       #=>  1
- *     Proc.new {|a,b|}.arity     #=>  2
- *     Proc.new {|a,b,c|}.arity   #=>  3
- *     Proc.new {|*a|}.arity      #=> -1
- *     Proc.new {|a,*b|}.arity    #=> -2
- *     Proc.new {|a,*b, c|}.arity    #=> -3
+ *     Proc.new {}.arity             #=>  0
+ *     Proc.new {||}.arity           #=>  0
+ *     Proc.new {|a|}.arity          #=>  1
+ *     Proc.new {|a, b|}.arity       #=>  2
+ *     Proc.new {|a, b, c|}.arity    #=>  3
+ *     Proc.new {|*a|}.arity         #=> -1
+ *     Proc.new {|a, b=42|}.arity    #=> -2
+ *     Proc.new {|a, *b, c|}.arity   #=> -3
  */
 
 static VALUE
@@ -648,7 +648,7 @@ rb_proc_arity(VALUE self)
     iseq = proc->block.iseq;
     if (iseq) {
 	if (BUILTIN_TYPE(iseq) != T_NODE) {
-	    if (iseq->arg_rest < 0) {
+	    if (iseq->arg_rest < 0 && iseq->arg_opts == 0) {
 		return iseq->argc;
 	    }
 	    else {
diff --git a/test/ruby/test_proc.rb b/test/ruby/test_proc.rb
index 3deb5c0109..ac8d568cde 100644
--- a/test/ruby/test_proc.rb
+++ b/test/ruby/test_proc.rb
@@ -68,6 +68,7 @@ class TestProc < Test::Unit::TestCase
     assert_equal(-1, proc{|*|}.arity)
     assert_equal(-3, proc{|x, *y, z|}.arity)
     assert_equal(-4, proc{|x, *y, z, a|}.arity)
+    assert_equal(-1, ->(a=42){}.arity)
 
     assert_arity(0) {}
     assert_arity(0) {||}