What approach does this book take to error recovery? Several "compiler light" style articles and books kind of walk over that part, and it can be non-trivial t

What approach does this book take to error recovery? Several "compiler light" style articles and books kind of walk over that part, and it can be non-trivial to do properly, especially with modern expectations. I remember way back in the day, one of the early C compilers for the PDP, and, honestly, it could almost be argued that ed(1) had better error messages than what that thing produced. A lot of simple compilers hit an error and just give up. So, just curious what the approach was in this book.