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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - std::copy failed to copy with volatile types on all LLVM versions. Same issue with GCC 10.0"
href="https://bugs.llvm.org/show_bug.cgi?id=45103">45103</a>
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<th>Summary</th>
<td>std::copy failed to copy with volatile types on all LLVM versions. Same issue with GCC 10.0
</td>
</tr>
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<th>Product</th>
<td>libc++
</td>
</tr>
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<th>Version</th>
<td>unspecified
</td>
</tr>
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<th>Hardware</th>
<td>All
</td>
</tr>
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<th>OS</th>
<td>All
</td>
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<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<th>Severity</th>
<td>release blocker
</td>
</tr>
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<th>Priority</th>
<td>P
</td>
</tr>
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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>euloanty@live.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>libc++ has this bug all the time while GCC has this issue since GCC 10.0.
<a href="https://gcc.gnu.org/bugzilla/show_bug.cgi?id=94013">https://gcc.gnu.org/bugzilla/show_bug.cgi?id=94013</a>
<a href="https://godbolt.org/z/YLtbCj">https://godbolt.org/z/YLtbCj</a>
#include<array>
void f()
{
std::array<int volatile,3> arr{};
std::copy(arr.cbegin(),arr.cend(),arr.begin());
}
In file included from <source>:1:
In file included from
/opt/compiler-explorer/clang-trunk-20200304/bin/../include/c++/v1/array:111:
/opt/compiler-explorer/clang-trunk-20200304/bin/../include/c++/v1/algorithm:1725:24:
error: cannot initialize a parameter of type 'void *' with an lvalue of type
'volatile int *'
_VSTD::memmove(__result, __first, __n * sizeof(_Up));
^~~~~~~~
/opt/compiler-explorer/clang-trunk-20200304/bin/../include/c++/v1/algorithm:1738:23:
note: in instantiation of function template specialization
'std::__1::__copy<const volatile int, volatile int>' requested here
return _VSTD::__copy(
^
/usr/include/string.h:46:29: note: passing argument to parameter '__dest' here
extern void *memmove (void *__dest, const void *__src, size_t __n)
^
1 error generated.
Compiler returned: 1</pre>
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