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Print stack traceback support for Lua 5.1

Lua 5.1 lacks the C API luaL_traceback() function, so Lua
debug.traceback() has to be used instead.
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commit 568e414754a22c36d7f5ff1403c931aa193f90bf 1 parent d7966db
@lefcha authored
Showing with 8 additions and 0 deletions.
  1. +8 −0 src/lua.c
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8 src/lua.c
@@ -98,7 +98,15 @@ static int
traceback_handler(lua_State *lua)
{
+#if LUA_VERSION_NUM < 502
+ lua_getfield(lua, LUA_GLOBALSINDEX, "debug");
+ lua_getfield(lua, -1, "traceback");
+ lua_pushvalue(lua, 1);
+ lua_pushinteger(lua, 2);
+ lua_call(lua, 2, 1);
+#else
luaL_traceback(lua, lua, lua_tostring(lua, 1), 0);
+#endif
return 1;
}
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