https://git.ruby-lang.org/ruby.git/commit/?id=de5e0f7c06

From de5e0f7c0671323820c4eb9b5a11c90a26c3dad5 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E5=8D=9C=E9=83=A8=E6=98=8C=E5=B9=B3?=
 <shyouhei@r...>
Date: Sun, 31 May 2020 17:34:58 +0900
Subject: vm_invoke_proc_block: reduce recursion

According to nobu recursion can be longer than my expectation.  Limit
them here.

diff --git a/vm_insnhelper.c b/vm_insnhelper.c
index bd6b0a2..6c82d74 100644
--- a/vm_insnhelper.c
+++ b/vm_insnhelper.c
@@ -3517,11 +3517,15 @@ vm_proc_to_block_handler(VALUE procval) https://github.com/ruby/ruby/blob/trunk/vm_insnhelper.c#L3517
 static VALUE
 vm_invoke_proc_block(rb_execution_context_t *ec, rb_control_frame_t *reg_cfp,
                      struct rb_calling_info *calling, const struct rb_callinfo *ci,
-                     MAYBE_UNUSED(bool is_lambda), VALUE block_handler)
+                     bool is_lambda, VALUE block_handler)
 {
-    return vm_invoke_block(ec, reg_cfp, calling, ci,
-        block_proc_is_lambda(VM_BH_TO_PROC(block_handler)),
-        vm_proc_to_block_handler(VM_BH_TO_PROC(block_handler)));
+    while (vm_block_handler_type(block_handler) == block_handler_type_proc) {
+        VALUE proc = VM_BH_TO_PROC(block_handler);
+        is_lambda = block_proc_is_lambda(proc);
+        block_handler = vm_proc_to_block_handler(proc);
+    }
+
+    return vm_invoke_block(ec, reg_cfp, calling, ci, is_lambda, block_handler);
 }
 
 static inline VALUE
-- 
cgit v0.10.2


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