<p dir="ltr">What do we do in the corresponding case for constructors? It seems like we should handle those two cases together.</p>
<div class="gmail_quote">On 10 Oct 2013 02:49, "Benjamin Kramer" <<a href="mailto:benny.kra@googlemail.com">benny.kra@googlemail.com</a>> wrote:<br type="attribution"><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
Author: d0k<br>
Date: Thu Oct 10 04:44:41 2013<br>
New Revision: 192345<br>
<br>
URL: <a href="http://llvm.org/viewvc/llvm-project?rev=192345&view=rev" target="_blank">http://llvm.org/viewvc/llvm-project?rev=192345&view=rev</a><br>
Log:<br>
Sema: Taking the address of a dtor is illegal per C++ [class.dtor]p2.<br>
<br>
Emit a proper error instead of crashing in CodeGen. PR16892.<br>
<br>
Modified:<br>
    cfe/trunk/include/clang/Basic/DiagnosticSemaKinds.td<br>
    cfe/trunk/lib/Sema/SemaExpr.cpp<br>
    cfe/trunk/test/SemaCXX/destructor.cpp<br>
<br>
Modified: cfe/trunk/include/clang/Basic/DiagnosticSemaKinds.td<br>
URL: <a href="http://llvm.org/viewvc/llvm-project/cfe/trunk/include/clang/Basic/DiagnosticSemaKinds.td?rev=192345&r1=192344&r2=192345&view=diff" target="_blank">http://llvm.org/viewvc/llvm-project/cfe/trunk/include/clang/Basic/DiagnosticSemaKinds.td?rev=192345&r1=192344&r2=192345&view=diff</a><br>

==============================================================================<br>
--- cfe/trunk/include/clang/Basic/DiagnosticSemaKinds.td (original)<br>
+++ cfe/trunk/include/clang/Basic/DiagnosticSemaKinds.td Thu Oct 10 04:44:41 2013<br>
@@ -4483,6 +4483,8 @@ def ext_typecheck_addrof_temporary : Ext<br>
   InGroup<DiagGroup<"address-of-temporary">>, DefaultError;<br>
 def err_typecheck_addrof_temporary : Error<<br>
   "taking the address of a temporary object of type %0">;<br>
+def err_typecheck_addrof_dtor : Error<<br>
+  "taking the address of a destructor">;<br>
 def err_typecheck_unary_expr : Error<<br>
   "invalid argument type %0 to unary expression">;<br>
 def err_typecheck_indirection_requires_pointer : Error<<br>
<br>
Modified: cfe/trunk/lib/Sema/SemaExpr.cpp<br>
URL: <a href="http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/Sema/SemaExpr.cpp?rev=192345&r1=192344&r2=192345&view=diff" target="_blank">http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/Sema/SemaExpr.cpp?rev=192345&r1=192344&r2=192345&view=diff</a><br>

==============================================================================<br>
--- cfe/trunk/lib/Sema/SemaExpr.cpp (original)<br>
+++ cfe/trunk/lib/Sema/SemaExpr.cpp Thu Oct 10 04:44:41 2013<br>
@@ -8709,6 +8709,10 @@ QualType Sema::CheckAddressOfOperand(Exp<br>
       }<br>
     }<br>
<br>
+    // Taking the address of a dtor is illegal per C++ [class.dtor]p2.<br>
+    if (isa<CXXDestructorDecl>(MD))<br>
+      Diag(OpLoc, diag::err_typecheck_addrof_dtor) << op->getSourceRange();<br>
+<br>
     return Context.getMemberPointerType(op->getType(),<br>
               Context.getTypeDeclType(MD->getParent()).getTypePtr());<br>
   } else if (lval != Expr::LV_Valid && lval != Expr::LV_IncompleteVoidType) {<br>
<br>
Modified: cfe/trunk/test/SemaCXX/destructor.cpp<br>
URL: <a href="http://llvm.org/viewvc/llvm-project/cfe/trunk/test/SemaCXX/destructor.cpp?rev=192345&r1=192344&r2=192345&view=diff" target="_blank">http://llvm.org/viewvc/llvm-project/cfe/trunk/test/SemaCXX/destructor.cpp?rev=192345&r1=192344&r2=192345&view=diff</a><br>

==============================================================================<br>
--- cfe/trunk/test/SemaCXX/destructor.cpp (original)<br>
+++ cfe/trunk/test/SemaCXX/destructor.cpp Thu Oct 10 04:44:41 2013<br>
@@ -363,3 +363,7 @@ namespace PR7900 {<br>
     (&b)->~A(); // expected-error{{destructor type 'PR7900::A' in object destruction expression does not match the type 'PR7900::B' of the object being destroyed}}<br>
   }<br>
 }<br>
+<br>
+namespace PR16892 {<br>
+  auto p = &A::~A; // expected-error{{taking the address of a destructor}}<br>
+}<br>
<br>
<br>
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</blockquote></div>