Hello,
I have three directories that contain 9508 files in total. I am running
luvit 0.10.0-38-gca69dfa on a vagrant vm that's run inside a win8 host.
When I try to read all directories in parallel (so scanning each directory
of those 3 through an async function), Luvit terminates with a segmentation
fault error message.
>From what I observe, it successfully read the first (and smallest)
directory's list and passed it to my closure which completed its job as it
should. It won't call any other closure (that was spawned inside my
original coroutine).
Taking that observation I could identify that it looks like as if the
coroutine I created was garbage collected:
-- crashing script:
... (code)
coroutine.wrap(updateSnapshots)()
--- end
-- not crashing script:
... (code)
blah = coroutine.wrap(updateSnapshots)
blah()
--- end
Further testing revealed:
-- crashing script as well:
... (code)
local blah = coroutine.wrap(updateSnapshots)
blah()
--- end
So my main script terminates and *I assume* that the garbage collector
identifies the coroutine stored in the local variable as unused and removes
it, destroying all memory associated with it. When the second directory
callback is attempting to call the closure, it will naturally fail.
...
I succeeded now to create a simple test case:
---
function test()
require "fs".readdir("dir_with_4kfiles",function(err,dir)
collectgarbage "collect"
end)
require "fs".readdir("other_dir_with_5kfiles",function(err,dir)
collectgarbage "collect"
end)
end
coroutine.wrap(test)()
---
Without the garbage collection the script terminates all right. Storing the
coroutine in a global variable makes the script work as well. If the
directories are sufficiently small, it won't crash either. Maybe because
the closure to be called is already scheduled or something... (I worked
less than 2 hours with luvit in total, so I don't really know anything ;))
I think I did as much as I could without diving into C code and a debugger.
I hope it helps to fix this issue.
Cheers,
Eike
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