std::string::insert (InputIterator, InputIterator) inserting self incorrect
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                 Key: STDCXX-632
                 URL: https://issues.apache.org/jira/browse/STDCXX-632
             Project: C++ Standard Library
          Issue Type: Bug
          Components: 21. Strings
    Affects Versions: 4.2, 4.1.4, 4.1.3, 4.1.2
         Environment: All
            Reporter: Farid Zaripov
            Priority: Minor
             Fix For: 4.2.1


The 21.string.insert.cpp test has been failing a number of assertions for self-referential test cases that exercise the ability to insert a substring of a string into itself using the insert(iterator, InputIterator, InputIterator) member template specialization for InputIterator being an actual Input Iterator. The program below reproduces the problem in a small isolated test case.

#include <cassert>
#include <string>

int main ()
{
    std::string s ("abc");

    typedef const unsigned char UChar;
    s.insert (s.begin (), (UChar*)&s [1], (UChar*)&s [2]);

    assert ("babc" == s);
}


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