string.c: term fill

* string.c (rb_str_delete_bang): fill wchar terminator.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@48764 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

string.c

@@ -5971,7 +5971,7 @@ rb_str_delete_bang(int argc, VALUE *argv, VALUE str)
 	    s += clen;
 	}
     }
-    *t = '\0';
+    TERM_FILL(t, TERM_LEN(str));
     STR_SET_LEN(str, t - RSTRING_PTR(str));
     ENC_CODERANGE_SET(str, cr);
 

test/-ext-/string/test_cstr.rb

@@ -64,6 +64,10 @@ class Test_StringCStr < Test::Unit::TestCase
     assert_wchars_term_char("foobar") {|s| s.sub!(/#{"foo".encode(s.encoding)}/, "")}
   end
 
+  def test_wchar_delete!
+    assert_wchars_term_char("foobar") {|s| s.delete!("ao".encode(s.encoding))}
+  end
+
   def assert_wchars_term_char(str)
     result = {}
     WCHARS.map do |enc|