From: matz@... (Yukihiro Matsumoto)
Date: 1999-11-08T14:31:59+09:00
Subject: [ruby-dev:8276] Re: super in eval

まつもと ゆきひろです

In message "[ruby-dev:8268] super in eval"
    on 99/11/08, Yasuhiro Fukuma <yasuf@big.or.jp> writes:

|ところで、これは仕様でしょうか?
|
|  class A
|    def foo
|      p "foo"
|    end
|    def bar
|      p "bar"
|    end
|    def baz
|      p "baz"
|    end
|  end
|  
|  class B < A
|    def foo
|      super
|    end
|    def bar
|      eval "super"
|    end
|    def baz
|      binding
|    end
|  end
|  
|  obj = B.new
|  obj.foo           #==> "foo"
|  obj.bar           #==> superclass method `eval' disabled
|  b = obj.baz
|  eval("super", b)  #==> superclass method `baz' disabled

バグです。パッチをつけておきます。

--- eval.c	1999/11/08 03:57:00	1.15
+++ eval.c	1999/11/08 05:31:08
@@ -294,6 +294,11 @@
     body = search_method(klass, mid, &origin);
-    if (!body || !body->nd_body || origin != klass) {
+    if (!body) {
 	print_undef(klass, mid);
+    }
+    if (!body->nd_body) {
+	remove_method(klass, mid);
+    }
+    else {
+	body->nd_noex &= ~NOEX_UNDEF;
     }
-    body->nd_noex &= ~NOEX_UNDEF;
 }
@@ -1698,3 +1703,3 @@
     PUSH_FRAME();
-    *ruby_frame = *_frame.prev;
+    *ruby_frame = *prev;
     ruby_frame->prev = prev;
@@ -4367,3 +4372,3 @@
 {
-    VALUE src, scope, vfile, vline;
+    VALUE src, scope, vfile, vline, val;
     char *file = "(eval)";
@@ -4381,2 +4386,15 @@
     Check_SafeStr(src);
+    if (NIL_P(scope) && ruby_frame->prev) {
+	struct FRAME *prev;
+	VALUE val;
+
+	prev = ruby_frame;
+	PUSH_FRAME();
+	*ruby_frame = *prev->prev;
+	ruby_frame->prev = prev;
+	val = eval(self, src, scope, file, line);
+	POP_FRAME();
+
+	return val;
+    }
     return eval(self, src, scope, file, line);
@@ -5474,2 +5492,3 @@
 	data->frame.last_func = ruby_frame->prev->last_func;
+	data->frame.last_class = ruby_frame->prev->last_class;
     }