diff --git a/gcc/cp/ChangeLog b/gcc/cp/ChangeLog
index cbec7d01487..434fde6ae59 100644
--- a/gcc/cp/ChangeLog
+++ b/gcc/cp/ChangeLog
@@ -1,3 +1,9 @@
+2018-05-30  Jonathan Wakely  <jwakely@redhat.com>
+
+	PR c++/77777
+	* call.c (resolve_args): Use location of expression, not current input
+	location.
+
 2018-05-30  Ville Voutilainen  <ville.voutilainen@gmail.com>
 
 	Do not warn about zero-as-null when NULL is used.
diff --git a/gcc/cp/call.c b/gcc/cp/call.c
index 98319f98c7d..d222b41c060 100644
--- a/gcc/cp/call.c
+++ b/gcc/cp/call.c
@@ -4147,7 +4147,7 @@ resolve_args (vec<tree, va_gc> *args, tsubst_flags_t complain)
 	    error ("invalid use of void expression");
 	  return NULL;
 	}
-      else if (invalid_nonstatic_memfn_p (input_location, arg, complain))
+      else if (invalid_nonstatic_memfn_p (arg->exp.locus, arg, complain))
 	return NULL;
     }
   return args;
diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog
index 338cbb254b3..af97797b0f8 100644
--- a/gcc/testsuite/ChangeLog
+++ b/gcc/testsuite/ChangeLog
@@ -1,3 +1,8 @@
+2018-05-30  Jonathan Wakely  <jwakely@redhat.com>
+
+	PR c++/77777
+	* g++.dg/diagnostic/pr77777.C: New test.
+
 2018-05-30  David Pagan  <dave.pagan@oracle.com>
 
 	PR c/55976
diff --git a/gcc/testsuite/g++.dg/diagnostic/pr77777.C b/gcc/testsuite/g++.dg/diagnostic/pr77777.C
new file mode 100644
index 00000000000..0e7676d5819
--- /dev/null
+++ b/gcc/testsuite/g++.dg/diagnostic/pr77777.C
@@ -0,0 +1,16 @@
+// PR c++/77777
+// { dg-do compile }
+
+struct X {
+  int f();
+};
+
+void g(int);
+
+int main()
+{
+  X x;
+  g(
+      x.f  // { dg-error "invalid use of non-static member function" }
+   );
+}