Program logic bugs vs input/environmental errors

[Paolo Invernizzi via Digitalmars-d]

On Saturday, 4 October 2014 at 01:52:41 UTC, ketmar via 
Digitalmars-d wrote:
> On Sun, 28 Sep 2014 17:09:57 -0700
> Walter Bright via Digitalmars-d <digitalmars-d at puremagic.com> 
> wrote:
>
>> If the program has entered an unknown state, its behavior from 
>> then
>> on cannot be predictable.
> and D compiler itself contradicts this principle. why it tries 
> to
> "recover" from parsing/compiling errors? it should stop on the 
> first
> encountered error and not trying to "recover" itself from 
> unknown state.
> hate this. and it's inconsistent with your words.

I think that there's a big confusion about terms: there's nothing 
unknown in the parser state when it reach an error in the grammar.
---
/Paolo