Segfault on tcp connect to tcp_echosvr.lua

[losinggeneration]

This code causes a segfault on cleanup:

local luv = require('luv')
luv.net.tcp():connect('127.0.0.1', 8080)

OS: Arch Linux 64 bit
Lua: 5.1.5
git head: e48f475

Let me know if you need more info to reproduce the crash.

-- update to indicate that it's not on connect, but rather on cleanup

[richardhundt]

Hi, thanks for the report.

I can't repro on Ubuntu 12.04 x86_64. It may be a GC race as you have don't have the tcp socket object anchored (no local variable).

Could you change line 27 of ./src/luv.h from

#undef LUV_DEBUG

to

#define LUV_DEBUG

and recompile.

It's pretty noisy, but it'd be great if you could send me the output from the client code and I'll take a look

Thanks!
Richard

On Oct 8, 2012, at 11:54 PM, Harley Laue wrote:

local luv = require('luv')
luv.net.tcp():connect('127.0.0.1', 8080)

[losinggeneration]

lua tcp_echoclient.lua
luv_thread.c: 26: luvL_thread_suspend: loop top
luv_thread.c: 5: luvL_thread_ready: SET READY
luv_thread.c: 29: luvL_thread_suspend: uv_run_once returned, active: 0
luv_thread.c: 31: luvL_thread_suspend: main ready, breaking
luv_thread.c: 36: luvL_thread_suspend: back in main
luv_object.c: 23: luvL_object_close: object closing 0x926828, type: 12
luv_stream.c: 277: luvL_stream_free: free stream: 0x926828
luv_object.c: 23: luvL_object_close: object closing 0x923868, type: 7
zsh: segmentation fault lua tcp_echoclient.lua

[richardhundt]

This was a bug in libuv - git HEAD is now fixed.

On Oct 9, 2012, at 1:59 AM, Harley Laue wrote:

lua tcp_echoclient.lua
luv_thread.c: 26: luvL_thread_suspend: loop top
luv_thread.c: 5: luvL_thread_ready: SET READY
luv_thread.c: 29: luvL_thread_suspend: uv_run_once returned, active: 0
luv_thread.c: 31: luvL_thread_suspend: main ready, breaking
luv_thread.c: 36: luvL_thread_suspend: back in main
luv_object.c: 23: luvL_object_close: object closing 0x926828, type: 12
luv_stream.c: 277: luvL_stream_free: free stream: 0x926828
luv_object.c: 23: luvL_object_close: object closing 0x923868, type: 7
zsh: segmentation fault lua tcp_echoclient.lua

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