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, 34 insertions, 0 deletions

diff --git a/gcc/testsuite/g++.dg/template/sfinae16.C b/gcc/testsuite/g++.dg/template/sfinae16.C
new file mode 100644
index 000000000..28a06d280
--- /dev/null
+++ b/gcc/testsuite/g++.dg/template/sfinae16.C
@@ -0,0 +1,34 @@
+// PR c++/41927
+// { dg-options "-std=c++0x -Wall" }
+
+// We were getting a spurious ||/&& warning about the enable_if with the
+// source position of d1.
+
+template<typename Tp>
+  struct is_int
+  { static const bool value = true; };
+
+template<bool, typename Tp = void>
+  struct enable_if
+  { };
+
+template<typename Tp>
+  struct enable_if<true, Tp>
+  { typedef Tp type; };
+
+template<typename Rep>
+  struct duration
+  {
+    duration() { }
+
+    template<typename Rep2, typename = typename
+             enable_if<false || (true && is_int<Rep2>::value)>::type>
+    duration(const duration<Rep2>&) { }
+  };
+
+int main()
+{
+  duration<int> d0;
+  duration<int> d1 = d0;	// { dg-warning "set but not used" }
+}
+