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-rw-r--r--include/ruby/intern.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/include/ruby/intern.h b/include/ruby/intern.h
index f9d4469f69..f1d47f654e 100644
--- a/include/ruby/intern.h
+++ b/include/ruby/intern.h
@@ -329,6 +329,7 @@ void ruby_set_stack_size(size_t);
NORETURN(void rb_memerror(void));
int ruby_stack_check(void);
int ruby_stack_length(VALUE**);
+int rb_during_gc(void);
void rb_gc_mark_locations(VALUE*, VALUE*);
void rb_mark_tbl(struct st_table*);
void rb_mark_set(struct st_table*);