<html>
<head>
<base href="https://bugs.llvm.org/">
</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 - clang allows goto inside statement expr"
href="https://bugs.llvm.org/show_bug.cgi?id=48749">48749</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>clang allows goto inside statement expr
</td>
</tr>
<tr>
<th>Product</th>
<td>clang
</td>
</tr>
<tr>
<th>Version</th>
<td>unspecified
</td>
</tr>
<tr>
<th>Hardware</th>
<td>PC
</td>
</tr>
<tr>
<th>OS</th>
<td>All
</td>
</tr>
<tr>
<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<th>Severity</th>
<td>enhancement
</td>
</tr>
<tr>
<th>Priority</th>
<td>P
</td>
</tr>
<tr>
<th>Component</th>
<td>-New Bugs
</td>
</tr>
<tr>
<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>nbkolchin@gmail.com
</td>
</tr>
<tr>
<th>CC</th>
<td>htmldeveloper@gmail.com, llvm-bugs@lists.llvm.org, neeilans@live.com, richard-llvm@metafoo.co.uk
</td>
</tr></table>
<p>
<div>
<pre>The following obviously incorrect program compiles without error under clang
and clang++:
#include <stdio.h>
int main(int argc, char** argv)
{
goto L_bug;
printf("%s, %s %s\n", "Hello", ({ L_bug: ; "world!";}), "What?");
}
gcc produces error: "error: jump into statement expression". g++ accepts this
code. (gcc bug: <a href="https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98682">https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98682</a>)
Tested clang versions: 11.0.0 and "Apple clang version 12.0.0
(clang-1200.0.32.28)".
This behaviour contradicts with documentation: "Jumping into a statement
expression with goto or using a switch statement outside the statement
expression with a case or default label inside the statement expression is not
permitted."</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>