Improvements in 'testes/cstack.lua'
- tests show progress in real time, so that we can see maximum
stack levels even if test crashes.
- new test for recursion continuing into message handler.
diff --git a/testes/cstack.lua b/testes/cstack.lua
index 9e5bbae..3cb1e4c 100644
--- a/testes/cstack.lua
+++ b/testes/cstack.lua
@@ -13,20 +13,40 @@
assert(not s and string.find(err, msg))
end
+local count
+local back = string.rep("\b", 8)
+local function progress ()
+ count = count + 1
+ local n = string.format("%-8d", count)
+ io.stderr:write(back, n)
+end
-do -- simple recursion
- local count = 0
+
+do print("testing simple recursion:")
+ count = 0
local function foo ()
- count = count + 1
+ progress()
foo()
end
checkerror("stack overflow", foo)
- print(" maximum recursion: " .. count)
+ print("\tfinal count: ", count)
+end
+
+
+do print("testing stack overflow in message handling")
+ count = 0
+ local function loop (x, y, z)
+ progress()
+ return 1 + loop(x, y, z)
+ end
+ local res, msg = xpcall(loop, loop)
+ assert(msg == "error in error handling")
+ print("\tfinal count: ", count)
end
-- bug since 2.5 (C-stack overflow in recursion inside pattern matching)
-do
+do print("testing recursion inside pattern matching")
local function f (size)
local s = string.rep("a", size)
local p = string.rep(".?", size)
@@ -38,25 +58,25 @@
end
--- testing stack-overflow in recursive 'gsub'
-do
- local count = 0
+do print("testing stack-overflow in recursive 'gsub'")
+ count = 0
local function foo ()
- count = count + 1
+ progress()
string.gsub("a", ".", foo)
end
checkerror("stack overflow", foo)
- print(" maximum 'gsub' nest (calls): " .. count)
+ print("\tfinal count: ", count)
- -- can be done with metamethods, too
+ print("testing stack-overflow in recursive 'gsub' with metatables")
count = 0
local t = setmetatable({}, {__index = foo})
foo = function ()
count = count + 1
+ progress(count)
string.gsub("a", ".", t)
end
checkerror("stack overflow", foo)
- print(" maximum 'gsub' nest (metamethods): " .. count)
+ print("\tfinal count: ", count)
end
print'OK'
