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<base href="https://bugs.llvm.org/">
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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - to_chars can puts leading zeros on numbers"
href="https://bugs.llvm.org/show_bug.cgi?id=42166">42166</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>to_chars can puts leading zeros on numbers
</td>
</tr>
<tr>
<th>Product</th>
<td>libc++
</td>
</tr>
<tr>
<th>Version</th>
<td>unspecified
</td>
</tr>
<tr>
<th>Hardware</th>
<td>All
</td>
</tr>
<tr>
<th>OS</th>
<td>All
</td>
</tr>
<tr>
<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<th>Severity</th>
<td>enhancement
</td>
</tr>
<tr>
<th>Priority</th>
<td>P
</td>
</tr>
<tr>
<th>Component</th>
<td>All Bugs
</td>
</tr>
<tr>
<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>mclow.lists@gmail.com
</td>
</tr>
<tr>
<th>CC</th>
<td>llvm-bugs@lists.llvm.org, mclow.lists@gmail.com
</td>
</tr></table>
<p>
<div>
<pre>Given the following code:
------
#include <charconv>
#include <iostream>
#include <cassert>
template <typename T>
void test()
{
char buf[100];
auto res = std::to_chars(buf, buf + 100, (T)0xffffffff);
assert(res.ec == std::errc());
*res.ptr = '\0';
std::cout << (const char *) buf << std::endl;
}
int main ()
{
test<int>();
test<long>();
test<int64_t>();
test<unsigned int>();
test<unsigned long>();
test<uint64_t>();
}
-----
I expect this to print:
-1
4294967295
4294967295
4294967295
4294967295
4294967295
but instead it prints:
-1
0004294967295
0004294967295
4294967295
0004294967295
0004294967295</pre>
</div>
</p>
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