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<base href="https://bugs.llvm.org/">
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<body><table border="1" cellspacing="0" cellpadding="8">
<tr>
<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - [12 regression] error: unable to execute command: Segmentation fault (core dumped)"
href="https://bugs.llvm.org/show_bug.cgi?id=51154">51154</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>[12 regression] error: unable to execute command: Segmentation fault (core dumped)
</td>
</tr>
<tr>
<th>Product</th>
<td>clang
</td>
</tr>
<tr>
<th>Version</th>
<td>12.0
</td>
</tr>
<tr>
<th>Hardware</th>
<td>PC
</td>
</tr>
<tr>
<th>OS</th>
<td>Linux
</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>C
</td>
</tr>
<tr>
<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>anbu1024.me@gmail.com
</td>
</tr>
<tr>
<th>CC</th>
<td>blitzrakete@gmail.com, dgregor@apple.com, erik.pilkington@gmail.com, llvm-bugs@lists.llvm.org, richard-llvm@metafoo.co.uk
</td>
</tr></table>
<p>
<div>
<pre>$ cat 10.c
struct S
{
char data[16];
};
struct S sx;
int y;
char z[((sizeof(0, ((sx, y)).data)) == (sizeof(char *))) ? (1) : (-1)];
char z[((sizeof(0, (sx = y).data)) == (sizeof(char *))) ? (1) : (-1)];
--------------------------------
$ clang-sp11 --version
clang version 11.0.0 (<a href="https://github.com/llvm/llvm-project.git">https://github.com/llvm/llvm-project.git</a>
0160ad802e899c2922bc9b29564080c22eb0908c)
Target: x86_64-unknown-linux-gnu
Thread model: posix
InstalledDir:
/home/tom/Documents/llvm/clang+llvm-11.0.0-x86_64-linux-gnu-ubuntu-20.04/bin
--------------------------------
$ clang-sp11 10.c
10.c:11:29: error: member reference base type 'int' is not a structure or union
char z[((sizeof(0, ((sx, y)).data)) == (sizeof(char *))) ? (1) : (-1)];
~~~~~~~~~^~~~~
10.c:13:24: error: assigning to 'struct S' from incompatible type 'int'
char z[((sizeof(0, (sx = y).data)) == (sizeof(char *))) ? (1) : (-1)];
^ ~
2 errors generated.
--------------------------------
$ clang-12 --version
clang version 12.0.0 (<a href="https://github.com/llvm/llvm-project/">https://github.com/llvm/llvm-project/</a>
b978a93635b584db380274d7c8963c73989944a1)
Target: x86_64-unknown-linux-gnu
Thread model: posix
InstalledDir:
/home/tom/Documents/llvm/clang+llvm-12.0.0-x86_64-linux-gnu-ubuntu-20.04/bin
--------------------------------
$ clang-12 10.c
10.c:11:29: error: member reference base type 'int' is not a structure or union
char z[((sizeof(0, ((sx, y)).data)) == (sizeof(char *))) ? (1) : (-1)];
~~~~~~~~~^~~~~
10.c:13:24: error: assigning to 'struct S' from incompatible type 'int'
char z[((sizeof(0, (sx = y).data)) == (sizeof(char *))) ? (1) : (-1)];
^ ~
PLEASE submit a bug report to <a href="https://bugs.llvm.org/">https://bugs.llvm.org/</a> and include the crash
backtrace, preprocessed source, and associated run script.
Stack dump:
0. Program arguments:
/home/tom/Documents/llvm/clang+llvm-12.0.0-x86_64-linux-gnu-ubuntu-20.04/bin/clang-12
-cc1 -triple x86_64-unknown-linux-gnu -emit-obj -mrelax-all
--mrelax-relocations -disable-free -disable-llvm-verifier -discard-value-names
-main-file-name 10.c -mrelocation-model static -mframe-pointer=all -fmath-errno
-fno-rounding-math -mconstructor-aliases -munwind-tables -target-cpu x86-64
-tune-cpu generic -fno-split-dwarf-inlining -debugger-tuning=gdb -resource-dir
/home/tom/Documents/llvm/clang+llvm-12.0.0-x86_64-linux-gnu-ubuntu-20.04/lib/clang/12.0.0
-internal-isystem /usr/local/include -internal-isystem
/home/tom/Documents/llvm/clang+llvm-12.0.0-x86_64-linux-gnu-ubuntu-20.04/lib/clang/12.0.0/include
-internal-externc-isystem /usr/include/x86_64-linux-gnu
-internal-externc-isystem /include -internal-externc-isystem /usr/include
-fdebug-compilation-dir
/media/Store/Project/C-compiler/ZSmith/data/bug-llvm-20210721/bug_dir/proc.0/deal
-ferror-limit 19 -fgnuc-version=4.2.1 -fcolor-diagnostics -faddrsig -o
/tmp/10-54d374.o -x c 10.c
1. 10.c:13:70: current parser token ';'
#0 0x00000000024ab943 llvm::sys::PrintStackTrace(llvm::raw_ostream&, int)
(/home/tom/Documents/llvm/clang+llvm-12.0.0-x86_64-linux-gnu-ubuntu-20.04/bin/clang-12+0x24ab943)
#1 0x00000000024a989e llvm::sys::RunSignalHandlers()
(/home/tom/Documents/llvm/clang+llvm-12.0.0-x86_64-linux-gnu-ubuntu-20.04/bin/clang-12+0x24a989e)
#2 0x00000000024abdef SignalHandler(int)
(/home/tom/Documents/llvm/clang+llvm-12.0.0-x86_64-linux-gnu-ubuntu-20.04/bin/clang-12+0x24abdef)
#3 0x00007f3017c7b3c0 __restore_rt
(/lib/x86_64-linux-gnu/libpthread.so.0+0x153c0)
#4 0x00000000043fc561
clang::ASTContext::propertyTypesAreCompatible(clang::QualType, clang::QualType)
(/home/tom/Documents/llvm/clang+llvm-12.0.0-x86_64-linux-gnu-ubuntu-20.04/bin/clang-12+0x43fc561)
#5 0x0000000008ef55e8
clang-12: error: unable to execute command: Segmentation fault (core dumped)
clang-12: error: clang frontend command failed due to signal (use -v to see
invocation)
clang version 12.0.0 (<a href="https://github.com/llvm/llvm-project/">https://github.com/llvm/llvm-project/</a>
b978a93635b584db380274d7c8963c73989944a1)
Target: x86_64-unknown-linux-gnu
Thread model: posix
InstalledDir:
/home/tom/Documents/llvm/clang+llvm-12.0.0-x86_64-linux-gnu-ubuntu-20.04/bin
clang-12: note: diagnostic msg:
********************
PLEASE ATTACH THE FOLLOWING FILES TO THE BUG REPORT:
Preprocessed source(s) and associated run script(s) are located at:
clang-12: note: diagnostic msg: /tmp/10-053b13.c
clang-12: note: diagnostic msg: /tmp/10-053b13.sh
clang-12: note: diagnostic msg:
********************</pre>
</div>
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