--- a/hotspot/src/share/vm/utilities/debug.cpp	Fri Jan 08 10:14:02 2016 +0100
+++ b/hotspot/src/share/vm/utilities/debug.cpp	Fri Dec 18 20:23:26 2015 +0300
@@ -480,12 +480,13 @@
 extern "C" void disnm(intptr_t p) {
   Command c("disnm");
   CodeBlob* cb = CodeCache::find_blob((address) p);
-  nmethod* nm = cb->as_nmethod_or_null();
-  if (nm) {
-    nm->print();
-    Disassembler::decode(nm);
-  } else {
-    cb->print();
+  if (cb != NULL) {
+    nmethod* nm = cb->as_nmethod_or_null();
+    if (nm != NULL) {
+      nm->print();
+    } else {
+      cb->print();
+    }
     Disassembler::decode(cb);
   }
 }