https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65257
Bug ID: 65257
Summary: cin not working with empty string when _GLIBCXX_DEBUG
is defined on Windows
Product: gcc
Version: 4.9.2
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: melnakeeb at hotmail dot com
Using latest Cygwin32 ,Cygwin64 and MinGW32 with GCC 4.9.2 , 4.9.2 and 4.8.1
respectively on Windows 7 64-bit. I am testing also on 32-bit Linux using GCC
4.8.2.
So on all systems this works
#include <bits/stdc++.h>
using namespace std;
string s,t;
int main(){
cin>>s>>t;
cout<<s;
}
and this works
#define _GLIBCXX_DEBUG
#include <bits/stdc++.h>
using namespace std;
string s="a",t="b";
int main(){
cin>>s>>t;
cout<<s;
}
but the next one crashes on Windows after inputting the first string on the 3
configurations mentioned above, but works correctly on Linux:
#define _GLIBCXX_DEBUG
#include <bits/stdc++.h>
using namespace std;
string s,t;
int main(){
cin>>s>>t;
cout<<s;
}
Clearly the only difference is that the string is empty before inputting, and
_GLIBCXX_DEBUG is enabled.
Previous discussions:
http://stackoverflow.com/questions/28708802/cin-not-working-with-empty-string-when-glibcxx-debug-on-windows
, http://sourceforge.net/p/mingw/bugs/1666/
and http://codeforces.com/blog/entry/15547#comment-215143
