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POA core-dump when using lua_yield and lua_resume
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copied!<p>I just want to resume the func coroutine twice, yield if n==0, and return if n==1 , but it core dumps, what't wrong with it? </p> <p>the "hello world" should always be left in LL's stack, I can't figure out what is wrong.</p> <pre><code>[liangdong@cq01-clientbe-code00.vm.baidu.com lua]$ ./main func_top=1 top=hello world first_top=1 top_string=hello world Segmentation fault (core dumped) [liangdong@cq01-clientbe-code00.vm.baidu.com lua]$ cat main.c #include "lua.h" #include "lualib.h" #include "lauxlib.h" int n = 0; int func(lua_State *L) { printf("func_top=%d top=%s\n", lua_gettop(L), lua_tostring(L, -1)); if (!n) { ++ n; return lua_yield(L, 1); } else { return 1; } } int main(int argc, char* const argv[]) { lua_State *L = luaL_newstate(); /* init lua library */ lua_pushcfunction(L, luaopen_base); if (lua_pcall(L, 0, 0, 0) != 0) { return 1; } lua_pushcfunction(L, luaopen_package); if (lua_pcall(L, 0, 0, 0 ) != 0) { return 2; } /* create the coroutine */ lua_State *LL = lua_newthread(L); lua_pushcfunction(LL, func); lua_pushstring(LL, "hello world"); /* first time resume */ if (lua_resume(LL, 1) == LUA_YIELD) { printf("first_top=%d top_string=%s\n", lua_gettop(LL), lua_tostring(LL, -1)); /* twice resume */ if (lua_resume(LL, 1) == 0) { printf("second_top=%d top_string=%s\n", lua_gettop(LL), lua_tostring(LL, -1)); } } lua_close(L); return 0; } </code></pre> <p>it core dumps in lua5.1, but works well in lua5.2 if change lua_resume(LL, 1) to lua_resume(LL, NULL, 1).</p>

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