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<base href="https://bugs.llvm.org/">
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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - Clang accepts invalid code"
href="https://bugs.llvm.org/show_bug.cgi?id=42212">42212</a>
</td>
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<tr>
<th>Summary</th>
<td>Clang accepts invalid code
</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>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>zhonghao@pku.org.cn
</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
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<pre>My clang is 9.0.0, and the code is:
void f() {
union {
typeof
(
(
{
unsigned long __ptr;
(int *)(0);
}
)
)
__val;
};
}
clang accepts the code, but icc, gcc and msvc all reject it.
msvc:
<source>(5): error C2059: syntax error: '('
<source>(6): error C2143: syntax error: missing ')' before '{'
<source>(6): error C4430: missing type specifier - int assumed. Note: C++ does
not support default-int
<source>(9): warning C4183: 'typeof': missing return type; assumed to be a
member function returning 'int'
<source>(10): error C2059: syntax error: ')'
<source>(11): error C2059: syntax error: ')'
<source>(12): error C2238: unexpected token(s) preceding ';'
<source>(13): error C2627: 'typeof': member function not allowed in anonymous
union
Compiler returned: 2
icc:
<source>(7): internal error: bad pointer
unsigned long __ptr;
^
compilation aborted for <source> (code 4)
Compiler returned: 4
gcc:
x86-64 gcc (trunk) (Editor #1, Compiler #1) C++
x86-64 gcc (trunk)
1
<Compilation failed>
No Results
x86-64 gcc (trunk)
- cached
#1 with x86-64 gcc (trunk)
<source>: In function 'void f()':
<source>:5:2: error: statement-expressions are not allowed outside functions
nor in template-argument lists
5 | (
| ^
Compiler returned: 1</pre>
</div>
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