diff -r 5f237f2cd5b2 -r 274fcce9d147 src/hotspot/share/opto/library_call.cpp
--- a/src/hotspot/share/opto/library_call.cpp	Tue Jan 22 11:42:13 2019 -0800
+++ b/src/hotspot/share/opto/library_call.cpp	Tue Jan 22 21:18:25 2019 +0100
@@ -6260,6 +6260,11 @@
   Node* dp = argument(5);
   Node* isURL = argument(6);
 
+  src = must_be_not_null(src, true);
+  src = access_resolve(src, ACCESS_READ);
+  dest = must_be_not_null(dest, true);
+  dest = access_resolve(dest, ACCESS_WRITE);
+
   Node* src_start = array_element_address(src, intcon(0), T_BYTE);
   assert(src_start, "source array is NULL");
   Node* dest_start = array_element_address(dest, intcon(0), T_BYTE);