void main()
{
  for(;;)
  {
  }
}

After preparing the above code, executing asbuild stopped at assert.

$ ./asbuild.exe config.txt script.as x.bin
Assertion failed: *(asBYTE*)(bc+length-1) == asBC_RET, file ..\..\source\as_restore.cpp, line 4671

However, `while (true)` is fine.

Also, I have not examined this properly,

It seems to be related to this matter, so I will write on it later.

void test()
{
  :
  return;
  :
  :
}

Perhaps, I think so,
If you have an `Unreachable code` like this, after you do
SaveBytecode, you` assert` this binary on loading.