Invalid fastbin entry

[ar2007]

Hi.
Anyone can help me with this error Message?

Thx


The program raises a runtime error

*** glibc detected *** ./prog: invalid fastbin entry (free): 0x085bb048 ***
======= Backtrace: =========
/lib/i386-linux-gnu/i686/cmov/libc.so.6(+0x6e3f1)[0xb74ca3f1]
/lib/i386-linux-gnu/i686/cmov/libc.so.6(+0x6fc58)[0xb74cbc58]
/lib/i386-linux-gnu/i686/cmov/libc.so.6(cfree+0x6d)[0xb74ced0d]
/usr/lib/i386-linux-gnu/libstdc++.so.6(_ZdlPv+0x1f)[0xb764a4bf]
/lib/i386-linux-gnu/i686/cmov/libc.so.6(__libc_start_main+0xe6)[0xb7472e46]
./prog[0x8048e61]
======= Memory map: ========
08048000-0804a000 r-xp 00000000 08:03 6301981 /home/w51clB/prog
0804a000-0804b000 rw-p 00001000 08:03 6301981 /home/w51clB/prog
085bb000-085dc000 rw-p 00000000 00:00 0 [heap]
b7300000-b7321000 rw-p 00000000 00:00 0
b7321000-b7400000 ---p 00000000 00:00 0
b745a000-b745c000 rw-p 00000000 00:00 0
b745c000-b75b2000 r-xp 00000000 08:03 7014801 /lib/i386-linux-gnu/i686/cmov/libc-2.13.so
b75b2000-b75b3000 ---p 00156000 08:03 7014801 /lib/i386-linux-gnu/i686/cmov/libc-2.13.so
b75b3000-b75b5000 r--p 00156000 08:03 7014801 /lib/i386-linux-gnu/i686/cmov/libc-2.13.so
b75b5000-b75b6000 rw-p 00158000 08:03 7014801 /lib/i386-linux-gnu/i686/cmov/libc-2.13.so
b75b6000-b75b9000 rw-p 00000000 00:00 0
b75b9000-b75d5000 r-xp 00000000 08:03 6998923 /lib/i386-linux-gnu/libgcc_s.so.1
b75d5000-b75d6000 rw-p 0001b000 08:03 6998923 /lib/i386-linux-gnu/libgcc_s.so.1
b75d6000-b75d7000 rw-p 00000000 00:00 0
b75d7000-b75fb000 r-xp 00000000 08:03 7014829 /lib/i386-linux-gnu/i686/cmov/libm-2.13.so
b75fb000-b75fc000 r--p 00023000 08:03 7014829 /lib/i386-linux-gnu/i686/cmov/libm-2.13.so
b75fc000-b75fd000 rw-p 00024000 08:03 7014829 /lib/i386-linux-gnu/i686/cmov/libm-2.13.so
b75fd000-b76dd000 r-xp 00000000 08:03 7537416 /usr/lib/i386-linux-gnu/libstdc++.so.6.0.17
b76dd000-b76e1000 r--p 000e0000 08:03 7537416 /usr/lib/i386-linux-gnu/libstdc++.so.6.0.17
b76e1000-b76e2000 rw-p 000e4000 08:03 7537416 /usr/lib/i386-linux-gnu/libstdc++.so.6.0.17
b76e2000-b76e9000 rw-p 00000000 00:00 0
b76eb000-b76ef000 rw-p 00000000 00:00 0
b76ef000-b76f0000 r-xp 00000000 00:00 0 [vdso]
b76f0000-b770c000 r-xp 00000000 08:03 6998900 /lib/i386-linux-gnu/ld-2.13.so
b770c000-b770d000 r--p 0001b000 08:03 6998900 /lib/i386-linux-gnu/ld-2.13.so
b770d000-b770e000 rw-p 0001c000 08:03 6998900 /lib/i386-linux-gnu/ld-2.13.so
bfc0e000-bfc23000 rw-p 00000000 00:00 0 [stack]

[writetonsharma]

your program has crashed. You would be better if you try to debug the code.
or you can post your code and we can help.

[ar2007]

Yes, of course. I try to do an exercise proposed by the book, which I'm learning C + +, as an autodidact. I thank you for your cooperation

#include <iostream>

#include <string>

#include <math.h>

using namespace std;

int main() {

string const vocali="aeiou";

string const consonanti="bcdfghjklmnpqrstvwxyz";

string cognome;

cout << "inserisci il cognome " <<'\n';

getline(cin,cognome);

int s=cognome.length();

int z=0;

int t=0;

string cons_cogn;

string voc_cogn;

string cod_fisc_cogn;


for (int i=0;i<s+1;i++)

{

string k="0";

k[i]=consonanti.find(cognome[i],0);

if (k[i]>0)

{

z=i-t;

cons_cogn[z]=cognome[i];

}

else

{

t=i-z;

voc_cogn[t]=cognome[i];

}

if (cons_cogn.length()>2)

{

cod_fisc_cogn=cons_cogn[0]+cons_cogn[1]+cons_cogn[2];

cout << cod_fisc_cogn <<'\n';

}

}

return(0);

}

[writetonsharma]

I see some issues as you are trying to put a number in string. you are trying to put things at invalid index in string.

What exactly you are trying to do in this code ?

[ar2007]

I try to perform an automatic calculation of the tax code. Cognome = Surname. but the program is regularly compiled. Do you think it is appropriate to use an array instead of strings?
I try to do a check of the individual characters within the string through a loop. in practice if in the control cycle, the character is a consonant, assigns the character string to "cod_fisc_cogn." I do the exercise with the only tools available to this point in the book.

(Google translate)

Bye

[ar2007]

hello. I understood what you wanted to tell me and I noticed that I had put k [i], which did not help. I have improved things and now it is ok. thank you again. P.S. I count on your help. not disappear :)

Cu

[Patriot524]

This is off-topic, but I don't get it. How come some issues get answered immediately and others like mine don't get one reply? O_o

[writetonsharma]

hmmm... when your string is empty you cannot access some index >=0. For the kind of thing, you can use string::reserve. This will keep space reserved for you and you can use index in the string even if its empty.

Rest I think you must have found the issues. good luck.

@Patriot524 - I replied to your other post.