Don't use %p when generating disassembly in vm service.

runtime/observatory/lib/src/service/object.dart

Index: runtime/observatory/lib/src/service/object.dart
diff --git a/runtime/observatory/lib/src/service/object.dart b/runtime/observatory/lib/src/service/object.dart
index 77599a75bb2c9fc2ec12d846deee48f60cb7c196..7afd69a3e878a409b4f041b19aca762f8175cd1f 100644
--- a/runtime/observatory/lib/src/service/object.dart
+++ b/runtime/observatory/lib/src/service/object.dart
@@ -3357,7 +3357,7 @@ class Code extends HeapObject {
       var pcOffset = 0;
       if (disassembly[i] != '') {
         // Not a code comment, extract address.
-        address = int.parse(disassembly[i]);
+        address = int.parse(disassembly[i], radix:16);
         pcOffset = address - startAddress;
       }
       var instruction = new CodeInstruction(address, pcOffset, machine, human);