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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - "The backtrack pos points inside the annotated tokens!" assert hit for wrong syntax"
href="https://llvm.org/bugs/show_bug.cgi?id=28913">28913</a>
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<th>Summary</th>
<td>"The backtrack pos points inside the annotated tokens!" assert hit for wrong syntax
</td>
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<th>Product</th>
<td>new-bugs
</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>Linux
</td>
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<th>Status</th>
<td>NEW
</td>
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<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>new bugs
</td>
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<th>Assignee</th>
<td>unassignedbugs@nondot.org
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</tr>
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<th>Reporter</th>
<td>shahar@ceemple.com
</td>
</tr>
<tr>
<th>CC</th>
<td>llvm-bugs@lists.llvm.org, yaron.keren@gmail.com
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<th>Classification</th>
<td>Unclassified
</td>
</tr></table>
<p>
<div>
<pre>Created <span class=""><a href="attachment.cgi?id=16918" name="attach_16918" title="Test code">attachment 16918</a> <a href="attachment.cgi?id=16918&action=edit" title="Test code">[details]</a></span>
Test code
Clang trunk version, built in release with asserts enabled, hits the following
assert:
clang-4.0: ../tools/clang/lib/Lex/PPCaching.cpp:109: void
clang::Preprocessor::AnnotatePreviousCachedTokens(const clang::Token &):
Assertion `(BacktrackPositions.empty() || BacktrackPositions.back() < i) &&
"The backtrack pos points inside the annotated tokens!"' failed.
When compiling the following syntactically wrong code:
class A {};
template < int > class B : A
B < >
Note that syntax errors are emitted properly prior to crashing.</pre>
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