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-rw-r--r--internal.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/internal.h b/internal.h
index e6d50ebcda..c040172f3e 100644
--- a/internal.h
+++ b/internal.h
@@ -1477,6 +1477,7 @@ ID rb_id_attrget(ID id);
VALUE rb_proc_location(VALUE self);
st_index_t rb_hash_proc(st_index_t hash, VALUE proc);
int rb_block_arity(void);
+int rb_block_min_max_arity(int *max);
VALUE rb_func_proc_new(rb_block_call_func_t func, VALUE val);
VALUE rb_func_lambda_new(rb_block_call_func_t func, VALUE val);