<html>
<head>
<base href="https://llvm.org/bugs/" />
</head>
<body><table border="1" cellspacing="0" cellpadding="8">
<tr>
<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - Assertion failure when recovering from unknown identifier."
href="https://llvm.org/bugs/show_bug.cgi?id=27229">27229</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>Assertion failure when recovering from unknown identifier.
</td>
</tr>
<tr>
<th>Product</th>
<td>clang
</td>
</tr>
<tr>
<th>Version</th>
<td>trunk
</td>
</tr>
<tr>
<th>Hardware</th>
<td>PC
</td>
</tr>
<tr>
<th>OS</th>
<td>Linux
</td>
</tr>
<tr>
<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<th>Keywords</th>
<td>crash-on-invalid
</td>
</tr>
<tr>
<th>Severity</th>
<td>normal
</td>
</tr>
<tr>
<th>Priority</th>
<td>P
</td>
</tr>
<tr>
<th>Component</th>
<td>Frontend
</td>
</tr>
<tr>
<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>rtrieu@google.com
</td>
</tr>
<tr>
<th>CC</th>
<td>llvm-bugs@lists.llvm.org
</td>
</tr>
<tr>
<th>Classification</th>
<td>Unclassified
</td>
</tr></table>
<p>
<div>
<pre>$ cat test.cc
class Runner {
void Run();
};
template <typename, typename>
class Two {};
template <typename>
class One {};
class Zero {};
namespace {
void Stop(const Two<int, One<Unknown>>&) {}
}
const int kTwenty = 20;
void Runner::Run() {
switch (0)
case 0:
Zero zero;
}
$ clang -std=c++11 test.cc
test.cc:13:30: error: use of undeclared identifier 'Unknown'
void Stop(const Two<int, One<Unknown>>&) {}
^
test.cc:14:1: error: expected a type
}
^
test.cc:16:23: error: expected ')'
const int kTwenty = 20;
^
test.cc:13:10: note: to match this '('
void Stop(const Two<int, One<Unknown>>&) {}
^
test.cc:18:14: error: cannot define or redeclare 'Run' here because namespace
''
does not enclose namespace 'Runner'
void Runner::Run() {
~~~~~~~~^
clang-3.5: ../include/llvm/ADT/SmallVector.h:164: reference
llvm::SmallVectorTemplateCommon<clang::SwitchStmt *, void>::back() [T =
clang::SwitchStmt *]: Assertion `!empty()' failed.
The identifier 'Unknown' is not defined, causing the first error. However, the
recover from that error messes up the scope, causing the assertion failure when
processing the switch statement.</pre>
</div>
</p>
<hr>
<span>You are receiving this mail because:</span>
<ul>
<li>You are on the CC list for the bug.</li>
</ul>
</body>
</html>