obtained gcc-4.6.4.tar.bz2 from upstream website;upstream

verified gcc-4.6.4.tar.bz2.sig;
imported gcc-4.6.4 source tree from verified upstream tarball.

downloading a git-generated archive based on the 'upstream' tag
should provide you with a source tree that is binary identical
to the one extracted from the above tarball.

if you have obtained the source via the command 'git clone',
however, do note that line-endings of files in your working
directory might differ from line-endings of the respective
files in the upstream repository.

1 files changed, 17 insertions, 0 deletions

diff --git a/gcc/testsuite/g++.dg/template/sizeof13.C b/gcc/testsuite/g++.dg/template/sizeof13.C
new file mode 100644
index 000000000..2f4a26e50
--- /dev/null
+++ b/gcc/testsuite/g++.dg/template/sizeof13.C
@@ -0,0 +1,17 @@
+// PR c++/42623
+// We should choose f(B) because f(A<undef>) involves applying sizeof to
+// an incomplete class, so it is removed by SFINAE.
+// { dg-do link }
+
+struct undef;
+
+template <typename U, int N = sizeof(U)> struct A { A(int); };
+template <typename U> void f(A<U>);
+
+template <typename U> struct B { B(int) { } };
+template <typename U> void f(B<U>) { }
+
+int main()
+{
+  f<undef>(0);
+}