> It's great that 2.0 is out! Unfortunately it seems to break some > code I used for Porter Stemming because the code sometimes reads data > from a pchar at negative indexes. Reportedly this works fine in > Delphi 5 and I don't seem to have trouble with Delphi 7 but it > generates RTEs using fpc 2.0. (If this is a FAQ, forgive me, I've > been away from Free Pascal for a while...)
Reading PChars at negative indexes? Buffer underrun in other words... This is absolutely not a good thing. If FPC is preventing buffer under and overrruns, then it is actually right, for once, and Delphi is wrong, wrong, wrong! A question... how do you know the memory at the negative index is valid? Various factors (memory management, record alignement and poor consistency in longterm projects) can alter what you are reading drastically. Even if you *believe* you know what it is. This is the kind of horror story I see sometimes in Legacy code that makes me wonder how the darn thing _ever_ worked all these years. You ask the guy maintaining it and he goes all mistical - "It just works, but no one remembers why.. we dare not change it because last time somebody did anything to it the entive project A/V'd every 30 seconds and died in a puff of green smoke." M M _______________________________________________ fpc-pascal maillist - fpc-pascal@lists.freepascal.org http://lists.freepascal.org/mailman/listinfo/fpc-pascal
