[ruby-dev:38294] [Bug:trunk] String#dump with non-ascii-compatible string provides invalid code

遠藤です。

アスキー非互換な文字列を String#dump すると eval できない文字列が
得られました。

$ ./ruby -e 'p "\u3042".encode("UTF-16LE").dump'
"\"B0\".force_encoding(\"UTF-16LE\"\x00"

Index: string.c
===================================================================
--- string.c	(revision 23159)
+++ string.c	(working copy)
@@ -4291,7 +4291,7 @@

     result = rb_str_new5(str, 0, len);
     p = RSTRING_PTR(str); pend = p + RSTRING_LEN(str);
-    q = RSTRING_PTR(result); qend = q + len;
+    q = RSTRING_PTR(result); qend = q + len + 1;

     *q++ = '"';
     while (p < pend) {
Index: test/ruby/test_m17n.rb
===================================================================
--- test/ruby/test_m17n.rb	(revision 23159)
+++ test/ruby/test_m17n.rb	(working copy)
@@ -241,6 +241,9 @@
       u("\xfc"),
       "\u3042",
       "ascii",
+
+      "\u3042".encode("UTF-16LE"),
+      "\u3042".encode("UTF-16BE"),
     ].each do |str|
       assert_equal(str, eval(str.dump), "[ruby-dev:33142]")
     end

-- 
Yusuke ENDOH <[e-mail]>