<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 - valid sizeof operation introduced compiler crash"
href="https://bugs.llvm.org/show_bug.cgi?id=37906">37906</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>valid sizeof operation introduced compiler crash
</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>Windows NT
</td>
</tr>
<tr>
<th>Status</th>
<td>NEW
</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>pickensd@synopsys.com
</td>
</tr>
<tr>
<th>CC</th>
<td>llvm-bugs@lists.llvm.org
</td>
</tr></table>
<p>
<div>
<pre>The following C test case causes clang to crash.
Assertion failed: (ND->isUsed(false) || !isa<VarDecl>(ND) ||
!E->getLocation().isValid()) && "Should not use decl without marking it used!",
file C:\src\llvm_package_333363\llvm\tools\clang\lib\CodeGen\CGExpr.cpp, line
2453
% clang --version
clang version 7.0.0 (trunk)
Target: i686-pc-windows-msvc
Thread model: posix
InstalledDir: C:\Program Files (x86)\LLVM\bin
Test case:
---------------- test.c --------------------------------------
#include <stdarg.h>
extern void exit (int);
extern void abort (void);
char a[1];
void
f1 (void)
{
int i = 0;
int j = sizeof (typeof (*(++i, (char (*)[i])a)));
if (i != 1 || j != 1)
abort ();
}
int
main (void)
{
f1 ();
exit (0);
}</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>