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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - Label array with unused result results in clang crash"
href="https://bugs.llvm.org/show_bug.cgi?id=43700">43700</a>
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<th>Summary</th>
<td>Label array with unused result results in clang crash
</td>
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<th>Product</th>
<td>clang
</td>
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<th>Version</th>
<td>9.0
</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>unassignedclangbugs@nondot.org
</td>
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<th>Reporter</th>
<td>spiritual.dragon.of.ra@gmail.com
</td>
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<th>CC</th>
<td>htmldeveloper@gmail.com, llvm-bugs@lists.llvm.org, neeilans@live.com, richard-llvm@metafoo.co.uk
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<div>
<pre>Created <span class=""><a href="attachment.cgi?id=22685" name="attach_22685" title="Attached: Backtrace, preprocessed source and associated run script">attachment 22685</a> <a href="attachment.cgi?id=22685&action=edit" title="Attached: Backtrace, preprocessed source and associated run script">[details]</a></span>
Attached: Backtrace, preprocessed source and associated run script
Overview:
Declaring a label array with at least 3 labels while not assigning the result
to a variable, causes a segmentation fault to occur.
Attached is the resulting log of the command "clang -v
clang_empty_lbl_array.c".
Steps to reproduce:
Compile the code shown below (which should result in an empty main()) with the
command "clang clang_empty_lbl_array.c".
int main () {
(void * []) { &&L3, &&L2, &&L1 };
L1: ;
L2: ;
L3: ;
}
Actual Results:
clang crashes, resulting in no executable being generated.
Expected Results:
Generation of executable (with a warning) equivalent to:
int main () {
L1: ;
L2: ;
L3: ;
}
Build Date & Hardware:
Built 17/Oct/2019 on:
> clang --version
clang version 9.0.0 (tags/RELEASE_900/final)
Target: x86_64-pc-linux-gnu
Thread model: posix
InstalledDir: /usr/bin</pre>
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