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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - num_get::do_get(in, end, unsigned) broken for negative numbers"
href="https://bugs.llvm.org/show_bug.cgi?id=47849">47849</a>
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<th>Summary</th>
<td>num_get::do_get(in, end, unsigned) broken for negative numbers
</td>
</tr>
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<th>Product</th>
<td>libc++
</td>
</tr>
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<th>Version</th>
<td>11.0
</td>
</tr>
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<th>Hardware</th>
<td>Macintosh
</td>
</tr>
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<th>OS</th>
<td>MacOS X
</td>
</tr>
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<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<th>Severity</th>
<td>normal
</td>
</tr>
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<th>Priority</th>
<td>P
</td>
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<th>Component</th>
<td>All Bugs
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<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>ramey@rrsd.com
</td>
</tr>
<tr>
<th>CC</th>
<td>llvm-bugs@lists.llvm.org, mclow.lists@gmail.com
</td>
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<p>
<div>
<pre>#include <iostream>
#include <sstream>
int main()
try {
unsigned u;
std::istringstream is{"-1"};
is >> u;
std::cout << u << std::endl;
}
catch (std::exception const& e)
{
std::cerr << "ERR: " << e.what() << std::endl;
}
reading a character stream containing "-1" into an unsigned integer does not
set the fail bit nor does it throw an exception. After the read completes, the
unsigned integer has a huge number in it.</pre>
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