https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68209
Bug ID: 68209
Summary: C++11 code compiled without -std=c++11 but doesn't
work as expected
Product: gcc
Version: 5.1.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: mirzayanovmr at gmail dot com
Target Milestone: ---
Tried on g++.EXE (tdm-1) 5.1.0 and g++ (GCC) 5.1.1 20150618 (Red Hat 5.1.1-4).
This code compiled successfully with command line 'g++ a.cpp'
#include <vector>
#include <iostream>
using namespace std;
int main()
{
vector<int> a;
for (int aa: a)
cout << aa << endl;
}
It prints warrning 'warning: range-based ‘for’ loops only available with
-std=c++11 or -std=gnu++11' but it is not a error.
I expected behaviour like on 4.9.2: it gives error 'error: range-based 'for'
loops are not allowed in C++98 mode'
As a result code compiled but doesn't work correctly. It prints lines
containing "0" infinitely.
I expect that such code shouldn't be compiled or at least (if compiled) work as
expected.
