[GiNaC-list] assignment

Nisoli Isaia nisoli at mail.dm.unipi.it
Mon Mar 28 11:33:53 CEST 2011 

Dear all,
I have a problem with Ginac.
I'm sorry if my question seems stupid, but I cannot solve the issue.

So, I define a new class:

class rinterval
{
        public:
        numeric min;
        numeric max;
        numeric error;

        //Constructor
        rinterval();
        rinterval(const numeric &, const numeric &, const numeric &);
        //Destructor
        ~rinterval();
        //Friend
        friend const rinterval dynamic(const rinterval &);
        friend std::ostream &operator<< (std::ostream &os, const rinterval
&inter)
        {
        return os << "[" << inter.min << "," << inter.max <<"], error = " <<
inter.error << endl;
        };
        rinterval& operator=(const rinterval &rhs);
};

The involved functions are these

rinterval::rinterval(const numeric &input1, const numeric &input2, const
numeric &miserr)
{
    if (input1>input2)
        {
            min=input2;
            max=input1;
        }
    else
        {
            min=input1;
            max=input2;
        }
    error=miserr;
}

const rinterval dynamic(const rinterval &domain)
{
    numeric a="1.47777777777777777777777777779999";
    rinterval temp(a*domain.min,a*domain.max,domain.error);
    cout << temp;
    return temp;
}

rinterval& rinterval::operator=(const rinterval &rhs)
{
        if (this == &rhs)  return *this;    // Same object?
        else
        {
        try
        {
        this->min=rhs.min;
        this->max=rhs.max;
        error=rhs.error;
        }
        catch(std::exception & exc)
        {
            std:cerr << "Exception" << exc.what() << endl;
        }
        return *this;
        }
}

Now, if inside the main I do

int main (void)
{
numeric a(1,10);
numeric b(2,10);
rinterval inter(a,b,(numeric)0.00001);
inter=dynamic(inter);
cout << inter << endl;
}

I get the following error:
*** glibc detected *** ./invmeasure.exe: invalid fastbin entry (free):
0x00000000008ec340 ***
======= Backtrace: =========
/lib/libc.so.6(+0x774b6)[0x7f2c9b11a4b6]
/lib/libc.so.6(cfree+0x73)[0x7f2c9b120c83]
/usr/lib/libcln.so.6(+0x6fa0d)[0x7f2c9ad91a0d]
/usr/lib/libcln.so.6(_ZN3cln11print_floatERSoRKNS_20cl_print_float_flagsERKNS_4cl_FE+0x29)[0x7f2c9ad92d39]
/usr/lib/libginac-1.5.so.0(+0x1ddb5b)[0x7f2c9bfbfb5b]
/usr/lib/libginac-1.5.so.0(_ZNK5GiNaC7numeric13print_numericERKNS_13print_contextEPKcS5_S5_S5_j+0x97)[0x7f2c9bfc0857]
/usr/lib/libginac-1.5.so.0(_ZNK5GiNaC7numeric8do_printERKNS_13print_contextEj+0x28)[0x7f2c9bfc0e48]
/usr/lib/libginac-1.5.so.0(_ZNK5GiNaC5basic14print_dispatchERKNS_10class_infoINS_24registered_class_optionsEEERKNS_13print_contextEj+0x18b)[0x7f2c9be6c62b]
/usr/lib/libginac-1.5.so.0(_ZN5GiNaClsERSoRKNS_2exE+0x9e)[0x7f2c9bfe5c2e]
./invmeasure.exe[0x404261]
./invmeasure.exe[0x403808]
/lib/libc.so.6(__libc_start_main+0xfe)[0x7f2c9b0c1d8e]
./invmeasure.exe[0x403439]
======= Memory map: ========
00400000-00407000 r-xp 00000000 08:07 66333
/home/isaia/Dropbox/HTGFL/GN-Comput_inv_1D/codice/invmeasure.exe
00607000-00608000 r--p 00007000 08:07 66333
/home/isaia/Dropbox/HTGFL/GN-Comput_inv_1D/codice/invmeasure.exe
00608000-00609000 rw-p 00008000 08:07 66333
/home/isaia/Dropbox/HTGFL/GN-Comput_inv_1D/codice/invmeasure.exe
008c7000-00909000 rw-p 00000000 00:00 0
[heap]
7f2c94000000-7f2c94021000 rw-p 00000000 00:00 0
7f2c94021000-7f2c98000000 ---p 00000000 00:00 0
7f2c9a8be000-7f2c9a91d000 r-xp 00000000 08:07 1523786
/usr/lib/libgmp.so.3.5.2
7f2c9a91d000-7f2c9ab1c000 ---p 0005f000 08:07 1523786
/usr/lib/libgmp.so.3.5.2
7f2c9ab1c000-7f2c9ab1d000 r--p 0005e000 08:07 1523786
/usr/lib/libgmp.so.3.5.2
7f2c9ab1d000-7f2c9ab1e000 rw-p 0005f000 08:07 1523786
/usr/lib/libgmp.so.3.5.2
7f2c9ab1e000-7f2c9ab20000 r-xp 00000000 08:07 262984
/lib/libdl-2.12.1.so
7f2c9ab20000-7f2c9ad20000 ---p 00002000 08:07 262984
/lib/libdl-2.12.1.so
7f2c9ad20000-7f2c9ad21000 r--p 00002000 08:07 262984
/lib/libdl-2.12.1.so
7f2c9ad21000-7f2c9ad22000 rw-p 00003000 08:07 262984
/lib/libdl-2.12.1.so
7f2c9ad22000-7f2c9ae98000 r-xp 00000000 08:07 1549774
/usr/lib/libcln.so.6.0.1
7f2c9ae98000-7f2c9b097000 ---p 00176000 08:07 1549774
/usr/lib/libcln.so.6.0.1
7f2c9b097000-7f2c9b09b000 r--p 00175000 08:07 1549774
/usr/lib/libcln.so.6.0.1
7f2c9b09b000-7f2c9b0a1000 rw-p 00179000 08:07 1549774
/usr/lib/libcln.so.6.0.1
7f2c9b0a1000-7f2c9b0a3000 rw-p 00000000 00:00 0
7f2c9b0a3000-7f2c9b21d000 r-xp 00000000 08:07 262821
/lib/libc-2.12.1.so
7f2c9b21d000-7f2c9b41c000 ---p 0017a000 08:07 262821
/lib/libc-2.12.1.so
7f2c9b41c000-7f2c9b420000 r--p 00179000 08:07 262821
/lib/libc-2.12.1.so
7f2c9b420000-7f2c9b421000 rw-p 0017d000 08:07 262821
/lib/libc-2.12.1.so
7f2c9b421000-7f2c9b426000 rw-p 00000000 00:00 0
7f2c9b426000-7f2c9b43b000 r-xp 00000000 08:07 262222
/lib/libgcc_s.so.1
7f2c9b43b000-7f2c9b63a000 ---p 00015000 08:07 262222
/lib/libgcc_s.so.1
7f2c9b63a000-7f2c9b63b000 r--p 00014000 08:07 262222
/lib/libgcc_s.so.1
7f2c9b63b000-7f2c9b63c000 rw-p 00015000 08:07 262222
/lib/libgcc_s.so.1
7f2c9b63c000-7f2c9b6be000 r-xp 00000000 08:07 262828
/lib/libm-2.12.1.so
7f2c9b6be000-7f2c9b8bd000 ---p 00082000 08:07 262828
/lib/libm-2.12.1.so
7f2c9b8bd000-7f2c9b8be000 r--p 00081000 08:07 262828
/lib/libm-2.12.1.so
7f2c9b8be000-7f2c9b8bf000 rw-p 00082000 08:07 262828
/lib/libm-2.12.1.so
7f2c9b8bf000-7f2c9b9a7000 r-xp 00000000 08:07 1523946
/usr/lib/libstdc++.so.6.0.14
7f2c9b9a7000-7f2c9bba6000 ---p 000e8000 08:07 1523946
/usr/lib/libstdc++.so.6.0.14
7f2c9bba6000-7f2c9bbae000 r--p 000e7000 08:07 1523946
/usr/lib/libstdc++.so.6.0.14
7f2c9bbae000-7f2c9bbb0000 rw-p 000ef000 08:07 1523946
/usr/lib/libstdc++.so.6.0.14
7f2c9bbb0000-7f2c9bbc5000 rw-p 00000000 00:00 0
7f2c9bbc5000-7f2c9bbdd000 r-xp 00000000 08:07 262823
/lib/libpthread-2.12.1.so
7f2c9bbdd000-7f2c9bddc000 ---p 00018000 08:07 262823
/lib/libpthread-2.12.1.so
7f2c9bddc000-7f2c9bddd000 r--p 00017000 08:07 262823
/lib/libpthread-2.12.1.so
7f2c9bddd000-7f2c9bdde000 rw-p 00018000 08:07 262823
/lib/libpthread-2.12.1.so
7f2c9bdde000-7f2c9bde2000 rw-p 00000000 00:00 0
7f2c9bde2000-7f2c9c0c1000 r-xp 00000000 08:07 1524595
/usr/lib/libginac-1.5.so.0.2.0
7f2c9c0c1000-7f2c9c2c0000 ---p 002df000 08:07 1524595
/usr/lib/libginac-1.5.so.0.2.0
7f2c9c2c0000-7f2c9c2cc000 r--p 002de000 08:07 1524595
/usr/lib/libginac-1.5.so.0.2.0
7f2c9c2cc000-7f2c9c2cd000 rw-p 002ea000 08:07 1524595
/usr/lib/libginac-1.5.so.0.2.0
7f2c9c2cd000-7f2c9c2cf000 rw-p 00000000 00:00 0
7f2c9c2cf000-7f2c9c2ef000 r-xp 00000000 08:07 262975
/lib/ld-2.12.1.so
7f2c9c4c3000-7f2c9c4ca000 rw-p 00000000 00:00 0
7f2c9c4ec000-7f2c9c4ef000 rw-p 00000000 00:00 0
7f2c9c4ef000-7f2c9c4f0000 r--p 00020000 08:07 262975
/lib/ld-2.12.1.so
7f2c9c4f0000-7f2c9c4f1000 rw-p 00021000 08:07 262975
/lib/ld-2.12.1.so
7f2c9c4f1000-7f2c9c4f2000 rw-p 00000000 00:00 0
7fff794fd000-7fff7951e000 rw-p 00000000 00:00 0
[stack]
7fff795c7000-7fff795c8000 r-xp 00000000 00:00 0
[vdso]
ffffffffff600000-ffffffffff601000 r-xp 00000000 00:00 0
[vsyscall]

I don't understand why, isn't the destruction of the old instances of min
and max done by the assignment operator for the type numeric?

Thank you in advance
Isaia
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