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-rw-r--r--parse.y2
1 files changed, 1 insertions, 1 deletions
diff --git a/parse.y b/parse.y
index 63ce0df..b533edd 100644
--- a/parse.y
+++ b/parse.y
@@ -7093,7 +7093,7 @@ parser_set_compile_option_flag(struct parser_params *parser, const char *name, c
if (b < 0) return;
if (!parser->compile_option)
- parser->compile_option = rb_ident_hash_new();
+ parser->compile_option = rb_obj_hide(rb_ident_hash_new());
rb_hash_aset(parser->compile_option, ID2SYM(rb_intern(name)),
(b ? Qtrue : Qfalse));
}