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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - Nesting of case-labels in AST"
href="https://bugs.llvm.org/show_bug.cgi?id=36581">36581</a>
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<th>Summary</th>
<td>Nesting of case-labels in AST
</td>
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<th>Product</th>
<td>clang
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<th>Version</th>
<td>trunk
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<th>Hardware</th>
<td>All
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<th>OS</th>
<td>Linux
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<th>Status</th>
<td>NEW
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<th>Severity</th>
<td>normal
</td>
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<th>Priority</th>
<td>P
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<th>Component</th>
<td>C++
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<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
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<th>Reporter</th>
<td>jonas.toth@gmail.com
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<th>CC</th>
<td>dgregor@apple.com, llvm-bugs@lists.llvm.org
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<pre>Hello everybody,
i noticed weird behaviour of clangs AST which is best shown with the following
example: (note the printed AST: nesting vs flat list)
<a href="https://godbolt.org/g/cKthLe">https://godbolt.org/g/cKthLe</a>
A list of empty cases in a switch statement do nest the AST, but a simple
semicolon prevents that and results in a flat list of case labels.
This issue is a direct blocker for <a href="https://reviews.llvm.org/D40737">https://reviews.llvm.org/D40737</a>, because it
leads to a stack overflow within the checks test cases.
The SO happened in one of Apples builders:
<a href="http://green.lab.llvm.org/green/job/clang-stage2-cmake-RgSan/5470/consoleFull#17462642768254eaf0-7326-4999-85b0-388101f2d404">http://green.lab.llvm.org/green/job/clang-stage2-cmake-RgSan/5470/consoleFull#17462642768254eaf0-7326-4999-85b0-388101f2d404</a></pre>
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