Hi,
here, with -std=c++11 LABEL_EXPR is unhandled by
potential_constant_expression_1 and we can't emit a meaningful
diagnostic. It seems safe to just add it to the main switch, together
with the existing LABEL_DECL.
Tested x86_64-linux.
Thanks,
Paolo.
//////////////////////
/cp
2013-10-02 Paolo Carlini <paolo.carl...@oracle.com>
PR c++/58565
* semantics.c (potential_constant_expression_1): Handle LABEL_EXPR.
/testsuite
2013-10-02 Paolo Carlini <paolo.carl...@oracle.com>
PR c++/58565
* g++.dg/parse/crash64.C: New.
Index: cp/semantics.c
===================================================================
--- cp/semantics.c (revision 203101)
+++ cp/semantics.c (working copy)
@@ -8422,6 +8422,7 @@ potential_constant_expression_1 (tree t, bool want
case OVERLOAD:
case TEMPLATE_ID_EXPR:
case LABEL_DECL:
+ case LABEL_EXPR:
case CONST_DECL:
case SIZEOF_EXPR:
case ALIGNOF_EXPR:
Index: testsuite/g++.dg/parse/crash64.C
===================================================================
--- testsuite/g++.dg/parse/crash64.C (revision 0)
+++ testsuite/g++.dg/parse/crash64.C (working copy)
@@ -0,0 +1,7 @@
+// PR c++/58565
+// { dg-options "" }
+
+void foo()
+{
+ int i = ({ L: ; }); // { dg-error "void value not ignored" }
+}
