Add RARRAY_LITERAL_FLAG for array literals

Array created as literals during iseq compilation don't need a
reference count since they can never be modified. The previous
implementation would mutate the hidden array's reference count,
causing copy-on-write invalidation.

This commit adds a RARRAY_LITERAL_FLAG for arrays created through
rb_ary_literal_new. Arrays created with this flag do not have reference
count stored and just assume they have infinite number of references.

Co-authored-by: Jean Boussier <[email protected]>

1 files changed, 1 insertions, 0 deletions

diff --git a/internal/array.h b/internal/array.h
index 690196a1e2..aa3b540153 100644
--- a/internal/array.h
+++ b/internal/array.h
@@ -33,6 +33,7 @@ void rb_ary_cancel_sharing(VALUE ary);
 size_t rb_ary_size_as_embedded(VALUE ary);
 void rb_ary_make_embedded(VALUE ary);
 bool rb_ary_embeddable_p(VALUE ary);
+VALUE rb_ary_literal_new(long capa);
 
 static inline VALUE rb_ary_entry_internal(VALUE ary, long offset);
 static inline bool ARY_PTR_USING_P(VALUE ary);