* object.c (rb_Integer): Integer(nil) should raise TypeError.

  [ruby-talk:210205]

* object.c (nil_to_s): no longer returns empty string but "nil".
  [ruby-talk:210205]

* lib/mkmf.rb: avoid COMMON_HEADERS being nil.


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@10801 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 7 insertions, 5 deletions

diff --git a/object.c b/object.c
index c8c39a3695..a396da0913 100644
--- a/object.c
+++ b/object.c
@@ -676,17 +676,15 @@ nil_to_f(VALUE obj)
 
 /*
  *  call-seq:
- *     nil.to_s    => ""
+ *     nil.to_s    => "nil"
  *  
- *  Always returns the empty string.
- *     
- *     nil.to_s   #=> ""
+ *  Always returns the string "nil".
  */
 
 static VALUE
 nil_to_s(VALUE obj)
 {
-    return rb_str_new2("");
+    return rb_str_new2("nil");
 }
 
 /*
@@ -2005,6 +2003,10 @@ rb_Integer(VALUE val)
       case T_STRING:
 	return rb_str_to_inum(val, 0, Qtrue);
 
+      case T_NIL:
+	rb_raise(rb_eTypeError, "can't convert nil into Integer");
+	break;
+
       default:
 	break;
     }