From e1d8770f12542d34a3e32b825c95b93f8a341ee1 Mon Sep 17 00:00:00 2001
From: Roberto Ierusalimschy <roberto@inf.puc-rio.br>
Date: Mon, 13 Jul 2020 13:39:02 -0300
Subject: Fixed bug: wrong stack limit when entering a coroutine

When entering a coroutine, the computation of nCcalls added 'from->nci'
to correct for preallocated CallInfos, but 'nci' includes also the
Callinfos already used.
---
 testes/cstack.lua | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

(limited to 'testes')

diff --git a/testes/cstack.lua b/testes/cstack.lua
index e3e14f74..4e37b988 100644
--- a/testes/cstack.lua
+++ b/testes/cstack.lua
@@ -105,6 +105,22 @@ do  print("testing stack-overflow in recursive 'gsub'")
   print("\tfinal count: ", count)
 end
 
+do   -- bug in 5.4.0
+  print("testing limits in coroutines inside deep calls")
+  count = 0
+  local lim = 1000
+  local function stack (n)
+    progress()
+    if n > 0 then return stack(n - 1) + 1
+    else coroutine.wrap(function ()
+           stack(lim)
+         end)()
+    end
+  end
+
+  print(xpcall(stack, function () return "ok" end, lim))
+end
+
 
 do  print("testing changes in C-stack limit")
 
-- 
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