Edit: false alarm, see below

Tested on rev1602. Empty lines (or otherwise syntactically insignificant lines, such as comments) can make the saved bytecode unloadable due to some problems with source line debug information. The following fails to load from bytecode unless debug information has been stripped:

funcdef void FUNC();
class T
{
    FUNC@ f;
}

void tmain()
{
    T t;
    @t.f = test;
    t.f();
}

void test()
{
}

LoadByteCode() returns asERROR. Removing any of the empty lines before the actual code begins seems to solve the issue.

That is odd. I'll investigate it. Thanks.

I couldn't reproduce the problem with the following test:

 
{
  engine = asCreateScriptEngine(ANGELSCRIPT_VERSION);
  engine->SetMessageCallback(asMETHOD(COutStream,Callback), &out, asCALL_THISCALL);
 
  mod = engine->GetModule(0, asGM_ALWAYS_CREATE);
  mod->AddScriptSection("Test",
    "\n"
    " \n"
    " \n"
    " \n"
    " \n"
    " \n"
    " \n"
    " \n"
    " \n"
    " \n"
    " \n"
    " \n"
    " \n"
    " \n"
    "funcdef void FUNC();\n"
    "class T\n"
    "{\n"
    "    FUNC@ f;\n"
    "}\n"
    "\n"
    "void tmain()\n"
    "{\n"
    "    T t;\n"
    "    @t.f = test;\n"
    "    t.f();\n"
    "}\n"
    "\n"
    "void test()\n"
    "{\n"
    "}\n");
  r = mod->Build();
  if( r < 0 )
    TEST_FAILED;
 
  CBytecodeStream stream(__FILE__"white");
  mod->SaveByteCode(&stream);
  engine->Release();
 
  engine = asCreateScriptEngine(ANGELSCRIPT_VERSION);
  engine->SetMessageCallback(asMETHOD(COutStream,Callback), &out, asCALL_THISCALL);
  mod = engine->GetModule("2", asGM_ALWAYS_CREATE);
  r = mod->LoadByteCode(&stream);
  if( r < 0 )
    TEST_FAILED;
 
  engine->Release();
}

Any idea what's missing to reproduce the problem?

The thing turned out to be a false alarm: it was Windows' CR/LF conversion mess up while loading the bytecode in our new test tool. Sorry to have bothered about this.

I understand. No problem. At least it wasn't a bug that was lurking in AngelScript. :)