* string (rb_string_value): warning for implicit conversion

  from Symbol to String. This behavior was introduced in r22606,
  merged in r22738 to ruby_1_9_1. It was an unexpected language
  feature change. It will be removed from Ruby in the 1.9.2.
  c.f. [ruby-dev:40274].

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_1_9_1@26571 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 1 insertions, 0 deletions

diff --git a/string.c b/string.c
index 8a8835eca5..125599c24a 100644
--- a/string.c
+++ b/string.c
@@ -1242,6 +1242,7 @@ rb_string_value(volatile VALUE *ptr)
     VALUE s = *ptr;
     if (TYPE(s) != T_STRING) {
 	if (SYMBOL_P(s)) {
+            rb_warn("Implicit conversion from Symbol to String was introduced by mistake. This bug will be fixed in Ruby 1.9.2.");
 	    s = rb_sym_to_s(s);
 	}
 	else {