* io.c (rb_io_mode_enc): encoding spec is not allowed in binary mode.

  [ruby-dev:32913]


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@14828 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 3 insertions, 0 deletions

diff --git a/io.c b/io.c
index a5a5f93743..18d651ea8f 100644
--- a/io.c
+++ b/io.c
@@ -3192,6 +3192,9 @@ rb_io_mode_enc(rb_io_t *fptr, const char *mode)
 {
     const char *p = strchr(mode, ':');
     if (p) {
+	if (fptr->mode & FMODE_BINMODE) {
+	    rb_raise(rb_eArgError, "encoding in binary mode");
+	}
 	mode_enc(fptr, p+1);
     }
 }