PR c++/23840

	* tree.c (lvalue_p1): A VA_ARG_EXPR with class type is an lvalue,
	when class rvalues are lvalues.

	PR c++/23840
	* g++.dg/expr/stdarg1.C: New test.


git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@104877 138bc75d-0d04-0410-961f-82ee72b054a4

1 files changed, 13 insertions, 0 deletions

diff --git a/gcc/testsuite/g++.dg/expr/stdarg1.C b/gcc/testsuite/g++.dg/expr/stdarg1.C
new file mode 100644
index 00000000000..85b6f7460e3
--- /dev/null
+++ b/gcc/testsuite/g++.dg/expr/stdarg1.C
@@ -0,0 +1,13 @@
+// PR c++/23840
+
+#include <stdarg.h>
+struct S 
+{
+  int f(int);
+};
+void f(int i, ...) 
+{
+  va_list ap;
+  va_start (ap, i);
+  va_arg (ap, S).f(0);
+}