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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - cannot request the size of an undeduced or dependent auto type"
href="http://llvm.org/bugs/show_bug.cgi?id=20869">20869</a>
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<th>Summary</th>
<td>cannot request the size of an undeduced or dependent auto type
</td>
</tr>
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<th>Product</th>
<td>clang
</td>
</tr>
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<th>Version</th>
<td>trunk
</td>
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<th>Hardware</th>
<td>PC
</td>
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<th>OS</th>
<td>Windows NT
</td>
</tr>
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<th>Status</th>
<td>NEW
</td>
</tr>
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<th>Severity</th>
<td>normal
</td>
</tr>
<tr>
<th>Priority</th>
<td>P
</td>
</tr>
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<th>Component</th>
<td>Frontend
</td>
</tr>
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<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>jeffrey.beu.uz8yz6yl@hotmail.com
</td>
</tr>
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<th>CC</th>
<td>llvmbugs@cs.uiuc.edu
</td>
</tr>
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<th>Classification</th>
<td>Unclassified
</td>
</tr></table>
<p>
<div>
<pre>Created <span class=""><a href="attachment.cgi?id=13003" name="attach_13003" title="Stderr">attachment 13003</a> <a href="attachment.cgi?id=13003&action=edit" title="Stderr">[details]</a></span>
Stderr
<span class="quote">>clang++ -c crash.cpp</span >
Assertion failed: !A->getDeducedType().isNull() && "cannot request the size of
an undeduced or dependent auto type", file
..\..\..\..\..\tools\clang\lib\AST\ASTContext.cpp, line 1694
Source code is in attachment.
I used a debug build of clang and llvm.
Basically made a typo in
template<class F, class... A> auto make_block(F f, A... a) ->
std::function<decltype(CRASHCLANG(a...))(A...)>
where CRASHCLANG wasn't declared.
I did't use std::function in source code provided to exclude preprocessing
headers.</pre>
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