iseq.c (iseq_data_to_ary): dump kw_arg as symbol

Fix RubyVM::InstructionSequence#to_a after r49517
Keywords were made symbols to fix [Bug #10831] [ruby-core:68031],
so we should dump symbols as-is instead of attempting to convert
them from IDs

* iseq.c (iseq_data_to_ary): dump kw_arg as symbol
* test/-ext-/iseq_load/test_iseq_load.rb: test kw_arg roundtrip
  [ruby-core:69891] [Bug #11338]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@51190 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 1 insertions, 1 deletions

diff --git a/iseq.c b/iseq.c
index cd7f67ac14..e8318b9233 100644
--- a/iseq.c
+++ b/iseq.c
@@ -1795,7 +1795,7 @@ iseq_data_to_ary(rb_iseq_t *iseq)
 
 			orig_argc -= ci->kw_arg->keyword_len;
 			for (i = 0; i < ci->kw_arg->keyword_len; i++) {
-			    rb_ary_push(kw, ID2SYM(ci->kw_arg->keywords[i]));
+			    rb_ary_push(kw, ci->kw_arg->keywords[i]);
 			}
 			rb_hash_aset(e, ID2SYM(rb_intern("kw_arg")), kw);
 		    }