Hi All,
Not a Cocoa problem as such, but not sure if there's a better list for
it:
On Snow Leopard (using gcc 4.2), I'm getting a 'double free' error in
the guts of the C++ std::getline. The 'free' in question is being
performed by std::string::reserve. This happens any time I run
'getline' (reading from cin) on a fresh, virgin string. (The error is
only seen in the Debug configuration.)
If, prior to the 'getline' call, I run any of:
- reserve
- push_back
- = "blah"
...on the string, I don't get the error.
Any idea what's going awry?
A very simple test case follows:
#include <iostream>
#include <string>
using namespace std;
int main (int argc, char * const argv[]) {
string line;
// Doing any of the following prior to 'getline' makes everything OK:
// line.push_back('x');
// line.reserve(10);
// line = "x";
getline(cin, line);
cout << "Line is: \"" << line << "\"" << endl;
return 0;
}
The error:
GetlineTest(1362) malloc: *** error for object 0x1000041e0: pointer
being freed was not allocated
Stack trace:
#0 0x7fff87af0b91 in malloc_error_break
#1 0x7fff87a1a083 in free
#2 0x7fff827181e8 in std::string::reserve
#3 0x7fff82718243 in std::string::push_back
#4 0x7fff827012b5 in std::getline<char, std::char_traits<char>,
std::allocator<char> >
#5 0x100001cfb in std::getline<char, std::char_traits<char>,
std::allocator<char> > at basic_string.h:2451
#6 0x10000141c in main at main.cpp:14
Thanks,
Aron
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