node.c (rb_ast_new): imemo_ast is WB-unprotected

Previously imemo_ast was handled as WB-protected which caused a segfault
of the following code:

    # shareable_constant_value: literal
    M0 = {}
    M1 = {}
    ...
    M100000 = {}

My analysis is here: `shareable_constant_value: literal` creates many
Hash instances during parsing, and add them to node_buffer of imemo_ast.
However, the contents are missed because imemo_ast is incorrectly
WB-protected.

This changeset makes imemo_ast as WB-unprotected.

1 files changed, 1 insertions, 0 deletions

diff --git a/internal/imemo.h b/internal/imemo.h
index a9e2136ac4..102356c78c 100644
--- a/internal/imemo.h
+++ b/internal/imemo.h
@@ -130,6 +130,7 @@ struct MEMO {
 
 typedef struct rb_imemo_tmpbuf_struct rb_imemo_tmpbuf_t;
 VALUE rb_imemo_new(enum imemo_type type, VALUE v1, VALUE v2, VALUE v3, VALUE v0);
+struct rb_ast_struct *rb_imemo_ast_new(VALUE node_buffer);
 rb_imemo_tmpbuf_t *rb_imemo_tmpbuf_parser_heap(void *buf, rb_imemo_tmpbuf_t *old_heap, size_t cnt);
 struct vm_ifunc *rb_vm_ifunc_new(rb_block_call_func_t func, const void *data, int min_argc, int max_argc);
 void rb_strterm_mark(VALUE obj);