On 11 Mar 2012, at 15:46, cobines wrote: > Is storing and using pointers to temporary strings safe?
No. > Like in the > following program. I think I remember reading on the mailing list that > it is not, but I cannot find it. How can I prove one way or the other? The only thing you can prove is finding code that crashes. You can't prove that it's safe, because it's impossible to prove a negative (namely that no code sequence exists that will crash). > I could not get the program to crash, even if I used 20 variables, it > didn't show any wrong result. Valgrind and Dr. Memory didn't show any > problems. Nevertheless it's not safe. It depends on management of temporary variables of the compiler, which in itself depends on the performed optimizations and compiler version. Just don't do it. Jonas_______________________________________________ fpc-pascal maillist - fpc-pascal@lists.freepascal.org http://lists.freepascal.org/mailman/listinfo/fpc-pascal
