Revert r33921.

Revert "* proc.c (rb_proc_arity): Fix Proc#arity in case of optional arguments"
Because following two reason:
* Proc#arity's return value with optional arguments is not clear.
  The optional argument for proc/lambda is Ruby 1.9 feature.
  In 1.9, proc(a, b=1){} can receive 1 or more arguments.
  But lambda(a, b=1){} can receive only 1 or two arguments.
  r33921 breaks lambda's arity.
  The spec arround optional arguments of proc/lambda needs more
  discussion.

* No tests.
  Add tests to test-all.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@33924 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 9 insertions, 9 deletions

diff --git a/proc.c b/proc.c
index 4d9f9baf5a..eeb8f09ae7 100644
--- a/proc.c
+++ b/proc.c
@@ -615,14 +615,14 @@ 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=42|}.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|}.arity    #=> -2
+ *     Proc.new {|a,*b, c|}.arity    #=> -3
  */
 
 static VALUE
@@ -641,7 +641,7 @@ rb_proc_arity(VALUE self)
     iseq = proc->block.iseq;
     if (iseq) {
 	if (BUILTIN_TYPE(iseq) != T_NODE) {
-	    if (iseq->arg_rest < 0 && iseq->arg_opts == 0) {
+	    if (iseq->arg_rest < 0) {
 		return iseq->argc;
 	    }
 	    else {