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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 - false positive for for -Wunreachable-code."
href="https://bugs.llvm.org/show_bug.cgi?id=41332">41332</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>false positive for for -Wunreachable-code.
</td>
</tr>
<tr>
<th>Product</th>
<td>clang
</td>
</tr>
<tr>
<th>Version</th>
<td>7.0
</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>normal
</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>pawel_sikora@zoho.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>#include <cstdio>
void foo( int i ) {
char const* j = nullptr;
switch ( i ) {
if ( 0 ) {
case 1:
j = "one";
}
if ( 0 ) {
case 2:
j = "two";
}
{
std::printf( "%s\n", j );
return;
}
default:
std::puts( "unknown" );
};
}
int main() {
foo( 0 );
foo( 1 );
foo( 2 );
foo( 3 );
return 0;
}
// clang version 7.0.1 (Fedora 7.0.1-6.fc29)
% clang++ t.cpp -Wall -Wunreachable-code -o t && ./t
t.cpp:8:14: warning: code will never be executed [-Wunreachable-code]
if ( 0 ) {
^
1 warning generated.
unknown
one
two
unknown
// g++ (GCC) 8.3.1 20190223 (Red Hat 8.3.1-2)
% g++ t.cpp -Wall -Wunreachable-code -o t && ./t
t.cpp: In function ‘void foo(int)’:
t.cpp:8:9: warning: statement will never be executed [-Wswitch-unreachable]
if ( 0 ) {
^~
unknown
one
two
unknown</pre>
</div>
</p>
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