Re: A malloc error in C++
Re: A malloc error in C++
- Subject: Re: A malloc error in C++
- From: Giacomo Monari <email@hidden>
- Date: Wed, 29 Aug 2007 17:15:05 +0200
Aaron Montgomery ha scritto:
Hi Giacomo,
Looks like the destructors for your data analysis class objects are
being called twice. Once explicitly by you and a second time (as they
go out of scope). Since they all go out of scope after you reach the
end of main. This is consistent with the "error happens after the
program has done its work."
Either remove the explicit destruction, or if required, place each
analysis run inside its own scope by adding { and }. See below for the
first case.
On Aug 29, 2007, at 7:13 AM, Giacomo Monari wrote:
Hello everyone,
while running a program called lab3_1 written in c++ I get this in
the Run Log:
lab3_1(1517) malloc: *** error for object 0x1804400: incorrect
checksum for freed object - object was probably modified after being
freed, break at szone_error to debug
lab3_1(1517) malloc: *** set a breakpoint in szone_error to debug
lab3_1 has exited due to signal 11 (SIGSEGV).
and the debugger window pops up...
<snipped start up code>
//add open brace here so zAnalysis lives in its own scope.
{
GMNLFS::DataAnalysis<vector<double>::iterator,double>
zAnalysis(z.begin(),z.end());
cout << "Max z = " << zAnalysis.GetMax() << endl;
cout << "Min z = " << zAnalysis.GetMin() << endl;
cout << "Average z = " << zAnalysis.GetAverage() << endl;
cout << "Variance of z = " << zAnalysis.GetVariance() << endl;
cout << "Standard Deviation of z = " <<
zAnalysis.GetStdDeviation() << endl;
cout << "Skewness of z = " << zAnalysis.GetSkewness() << endl;
cout << "Kurtosis of z = " << zAnalysis.GetKurtosis() << endl;
cout << " ------------------------------------- " << endl;
//add a close brace here to clean up zAnalysis
}
//remove this line
// zAnalysis.~DataAnalysis();
//repeat for each Analysis object
Hope that helps,
Aaron
Clark Cox ha scritto:
Here's your problem. Why are you trying to call the destructor directly?
Thx and sorry guys but still doesn't work. Before I forgot to say that I
added those calls to the destructors only to see if something would have
changed, but it didn't...
Removing them and also adding the braces, Aaron, brings no changes... :(
What could be?
Giacomo
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