On OS X method entry and return probes have invalid arg6 value

[2013-12-10T09:08:05.58] dtrace_out> BEGIN Method Invocation probes testing
[2013-12-10T09:08:05.58] dtrace_out>
[2013-12-10T09:08:05.58] dtrace_out>
[2013-12-10T09:08:05.58] dtrace_out> PROBE ARGS: method-entry, method-return
[2013-12-10T09:08:05.58] dtrace_out> arg0: Java thread id
[2013-12-10T09:08:05.58] dtrace_out> arg1: class name pointer
[2013-12-10T09:08:05.58] dtrace_out> arg2: class name length
[2013-12-10T09:08:05.58] dtrace_out> arg3: method name pointer
[2013-12-10T09:08:05.58] dtrace_out> arg4: method name length
[2013-12-10T09:08:05.58] dtrace_out> arg5: method signature pointer
[2013-12-10T09:08:05.58] dtrace_out> arg6: method signature length
[2013-12-10T09:08:05.58] dtrace_out> =================> probe name = method-entry
[2013-12-10T09:08:05.58] dtrace_out> =================> class name = java/util/Properties
[2013-12-10T09:08:05.58] dtrace_out> =================> method name = <init>
[2013-12-10T09:08:05.58] dtrace_out> =================> signature = ()V
[2013-12-10T09:08:05.58] dtrace_out> =================> signature size = 8589934595
[2013-12-10T09:08:05.58] dtrace_out>
[2013-12-10T09:08:05.58] dtrace_out> =================> probe name = method-entry
[2013-12-10T09:08:05.58] dtrace_out> =================> class name = java/util/Properties
[2013-12-10T09:08:05.58] dtrace_out> =================> method name = <init>
[2013-12-10T09:08:05.58] dtrace_out> =================> signature = (Ljava/util/Properties;)V
[2013-12-10T09:08:05.58] dtrace_out> =================> signature size = 8589934617
[2013-12-10T09:08:05.58] dtrace_out>
[2013-12-10T09:08:05.58] dtrace_out> =================> probe name = method-entry
[2013-12-10T09:08:05.58] dtrace_out> =================> class name = java/util/Hashtable
[2013-12-10T09:08:05.58] dtrace_out> =================> method name = <init>
[2013-12-10T09:08:05.58] dtrace_out> =================> signature = ()V
[2013-12-10T09:08:05.58] dtrace_out> =================> signature size = 140290811756547