From bf22dff8ea5f3ac94ab1a354abea48fd7c3f272c Mon Sep 17 00:00:00 2001
From: matz <matz@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
Date: Fri, 3 Sep 2004 17:41:27 +0000
Subject: [PATCH] * eval.c (cvar_cbase): class variables cause SEGV in  
 instance_eval() for fixnums and symbols. [ruby-dev:24213]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@6855 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
---
 ChangeLog |  5 +++++
 eval.c    |  3 +++
 math.c    | 23 -----------------------
 3 files changed, 8 insertions(+), 23 deletions(-)

diff --git a/ChangeLog b/ChangeLog
index e14357c40f..ae9bbb9bc6 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+Sat Sep  4 01:14:57 2004  Yukihiro Matsumoto  <matz@ruby-lang.org>
+
+	* eval.c (cvar_cbase): class variables cause SEGV in
+	  instance_eval() for fixnums and symbols. [ruby-dev:24213]
+
 Fri Sep  3 17:47:58 2004  Yukihiro Matsumoto  <matz@ruby-lang.org>
 
 	* struct.c (make_struct): remove redefining constant when
diff --git a/eval.c b/eval.c
index 46c687dc4e..ac3ff420b5 100644
--- a/eval.c
+++ b/eval.c
@@ -1779,6 +1779,9 @@ cvar_cbase()
 	    rb_warn("class variable access from toplevel singleton method");
 	}
     }
+    if (NIL_P(cref->nd_clss)) {
+	rb_raise(rb_eTypeError, "no class variables available");
+    }
     return cref->nd_clss;
 }
 
diff --git a/math.c b/math.c
index cea7bb801d..5b9294e781 100644
--- a/math.c
+++ b/math.c
@@ -331,28 +331,6 @@ math_log(obj, x)
     return rb_float_new(d);
 }
 
-/*
- *  call-seq:
- *     Math.log2(numeric)    => float
- *  
- *  Returns the base 2 logarithm of <i>numeric</i>.
- */
-
-static VALUE
-math_log2(obj, x)
-    VALUE obj, x;
-{
-    double d;
-
-    Need_Float(x);
-    errno = 0;
-    d = log2(RFLOAT(x)->value);
-    if (errno) {
-	rb_sys_fail("log2");
-    }
-    return rb_float_new(d);
-}
-
 /*
  *  call-seq:
  *     Math.log10(numeric)    => float
@@ -533,7 +511,6 @@ Init_Math()
 
     rb_define_module_function(rb_mMath, "exp", math_exp, 1);
     rb_define_module_function(rb_mMath, "log", math_log, 1);
-    rb_define_module_function(rb_mMath, "log2", math_log, 1);
     rb_define_module_function(rb_mMath, "log10", math_log10, 1);
     rb_define_module_function(rb_mMath, "sqrt", math_sqrt, 1);