PR c++/83186 - ICE with static_cast of list-initialized temporary.

	* typeck.c (build_static_cast): Use build_non_dependent_expr.

From-SVN: r256594

gcc/cp/ChangeLog

+2018-01-12  Jason Merrill  <jason@redhat.com>
+
+	PR c++/83186 - ICE with static_cast of list-initialized temporary.
+	* typeck.c (build_static_cast): Use build_non_dependent_expr.
+
 2018-01-12  Nathan Sidwell  <nathan@acm.org>
 
 	* cp-tree.h (mark_rvalue_use): Add parm name.

gcc/cp/typeck.c

@@ -7204,6 +7204,8 @@ build_static_cast (tree type, tree oexpr, tsubst_flags_t complain)
       TREE_SIDE_EFFECTS (expr) = 1;
       return convert_from_reference (expr);
     }
+  else if (processing_template_decl)
+    expr = build_non_dependent_expr (expr);
 
   /* build_c_cast puts on a NOP_EXPR to make the result not an lvalue.
      Strip such NOP_EXPRs if VALUE is being used in non-lvalue context.  */

gcc/testsuite/g++.dg/cpp0x/initlist-cast1.C

+// PR c++/83186
+// { dg-do compile { target c++11 } }
+
+struct a {
+  operator unsigned();
+};
+template <class> void b() { static_cast<unsigned>(a{}); }
+
+int main()
+{
+  b<int>();
+}