io.c: update argf lineno

* io.c (argf_rewind): rewind line number in non-global ARGF
  instance.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@57125 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 9 insertions, 1 deletions

diff --git a/io.c b/io.c
index 3da57a0b40..65254ff102 100644
--- a/io.c
+++ b/io.c
@@ -11098,11 +11098,19 @@ argf_set_pos(VALUE argf, VALUE offset)
 static VALUE
 argf_rewind(VALUE argf)
 {
+    VALUE ret;
+    int old_lineno;
+
     if (!next_argv()) {
 	rb_raise(rb_eArgError, "no stream to rewind");
     }
     ARGF_FORWARD(0, 0);
-    return rb_io_rewind(ARGF.current_file);
+    old_lineno = RFILE(ARGF.current_file)->fptr->lineno;
+    ret = rb_io_rewind(ARGF.current_file);
+    if (!global_argf_p(argf)) {
+	ARGF.last_lineno = ARGF.lineno -= old_lineno;
+    }
+    return ret;
 }
 
 /*