From: Tanaka Akira <akr@...17n.org>
Date: 2005-12-12T17:38:35+09:00
Subject: [ruby-dev:28001] test_binary(TestSprintf):<"..1"> expected but was <"..1\216l">.

実のところこういう入りかたは予測していなかったのですが、それ
はそれで試しやすくなったので x86_64 で試すと、とりあえず

% RUBY_ALWAYS_GC= ./ruby -v test/runner.rb test/ruby/test_sprintf.rb
ruby 1.9.0 (2005-12-12) [x86_64-linux]
Loaded suite test_sprintf.rb
Started
F..
Finished in 52.082209 seconds.

  1) Failure:
test_binary(TestSprintf) [/home/akr/w/ruby/test/ruby/test_sprintf.rb:8]:
<"..1"> expected but was
<"..1\216l">.

3 tests, 49 assertions, 1 failures, 0 errors

というのが発見できました。

Index: sprintf.c
===================================================================
RCS file: /src/ruby/sprintf.c,v
retrieving revision 1.60
diff -u -p -r1.60 sprintf.c
--- sprintf.c	7 Dec 2005 08:41:59 -0000	1.60
+++ sprintf.c	12 Dec 2005 08:13:23 -0000
@@ -604,12 +604,13 @@ rb_str_format(int argc, const VALUE *arg
 			}
 		    }
 		    else {
+                        volatile VALUE tmp1;
 			if (!RBIGNUM(val)->sign) {
 			    val = rb_big_clone(val);
 			    rb_big_2comp(val);
 			}
-			tmp = rb_big2str(val, base);
-			s = RSTRING(tmp)->ptr;
+			tmp1 = rb_big2str(val, base);
+			s = RSTRING(tmp1)->ptr;
 			if (*s == '-') {
 			    if (base == 10) {
 				rb_warning("negative number for %%u specifier");

というところですかね。
-- 
[田中 哲][たなか あきら][Tanaka Akira]