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<base href="http://llvm.org/bugs/" />
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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - clang asserts in skipRValueSubobjectAdjustments"
href="http://llvm.org/bugs/show_bug.cgi?id=18217">18217</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>clang asserts in skipRValueSubobjectAdjustments
</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>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>C++11
</td>
</tr>
<tr>
<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>ganna@apple.com
</td>
</tr>
<tr>
<th>CC</th>
<td>dgregor@apple.com, llvmbugs@cs.uiuc.edu
</td>
</tr>
<tr>
<th>Classification</th>
<td>Unclassified
</td>
</tr></table>
<p>
<div>
<pre>The following code triggers an assertion in clang TOT. The assertion is coming
from the jump diagnostic code; switch is necessary for reproduction.
$ cat ex.cpp
class X {
};
template <typename T>
class MyCl {
T mem;
};
class Source {
MyCl<X> m;
public:
int getKind() const;
};
bool b;
template<typename TT>
static void foo(const Source &SF, MyCl<TT *> Source::*m) {
switch (SF.getKind()) {
case 1: return;
case 2: break;
case 3:
case 4: return;
};
if (b) {
auto &y = const_cast<MyCl<TT *> &>(SF.*m);
}
}
int main(int argc, char **argv) {
}
$ clang -std=c++11 ex.cpp
Assertion failed: (BO->getRHS()->isRValue()), function
skipRValueSubobjectAdjustments, file
/Volumes/Data/ws/llvmgit/llvm/tools/clang/lib/AST/Expr.cpp, line 89.
0 clang 0x000000010b34193e
llvm::sys::PrintStackTrace(__sFILE*) + 46
1 clang 0x000000010b341c4b
PrintStackTraceSignalHandler(void*) + 27
2 clang 0x000000010b341fdc SignalHandler(int) + 412
3 libsystem_platform.dylib 0x00007fff8a7b55aa _sigtramp + 26
4 libsystem_platform.dylib 0x00007fff560c3578 _sigtramp + 3415269352
5 clang 0x000000010b341c7b raise + 27
6 clang 0x000000010b341d32 abort + 18
7 clang 0x000000010b341d11 __assert_rtn + 129
8 clang 0x000000010cd0da60
clang::Expr::skipRValueSubobjectAdjustments(llvm::SmallVectorImpl<clang::Expr
const*>&, llvm::SmallVectorImpl<clang::SubobjectAdjustment>&) const + 752
9 clang 0x000000010c49d6e0
GetDiagForGotoScopeDecl(clang::ASTContext&, clang::Decl const*) + 1200
10 clang 0x000000010c49cd5e (anonymous
namespace)::JumpScopeChecker::BuildScopeInformation(clang::Decl*, unsigned
int&) + 62
11 clang 0x000000010c49ad23 (anonymous
namespace)::JumpScopeChecker::BuildScopeInformation(clang::Stmt*, unsigned
int&) + 1731
12 clang 0x000000010c49b335 (anonymous
namespace)::JumpScopeChecker::BuildScopeInformation(clang::Stmt*, unsigned
int&) + 3285
13 clang 0x000000010c49b335 (anonymous
namespace)::JumpScopeChecker::BuildScopeInformation(clang::Stmt*, unsigned
int&) + 3285
14 clang 0x000000010c49a54e (anonymous
namespace)::JumpScopeChecker::JumpScopeChecker(clang::Stmt*, clang::Sema&) +
222
15 clang 0x000000010c49a295 (anonymous
namespace)::JumpScopeChecker::JumpScopeChecker(clang::Stmt*, clang::Sema&) + 37
16 clang 0x000000010c49a238
clang::Sema::DiagnoseInvalidJumps(clang::Stmt*) + 56</pre>
</div>
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