Restore rb_exec_recursive_outer

This was a public method, so we should probably keep it.

1 files changed, 1 insertions, 0 deletions

diff --git a/hash.c b/hash.c
index c6aa83eb0d..7568538214 100644
--- a/hash.c
+++ b/hash.c
@@ -35,6 +35,7 @@
 #include "internal/object.h"
 #include "internal/proc.h"
 #include "internal/symbol.h"
+#include "internal/thread.h"
 #include "internal/time.h"
 #include "internal/vm.h"
 #include "probes.h"