[Lazarus] Laz x64 trunk Windows debugging error

[Reinier Olislagers]

FPC x64 trunk r25583+Lazarus trunk r42970, Windows
Got this while debugging:

Press "Ignore" to continue debugging. This may NOT be safe. Press
"Abort" to stop the debugger.
Exception: ERangeError with message "Range check error"
Context: TGDBMIDebuggerCommandDisassembe. State: Pause

  $0000000100A7C681 line 3243 of ../debugger/gdbmidebugger.pp
  $0000000100A7C59C line 3235 of ../debugger/gdbmidebugger.pp
  $0000000100A81444 line 3786 of ../debugger/gdbmidebugger.pp
  $0000000100A803A0 line 4272 of ../debugger/gdbmidebugger.pp
  $0000000100A7E820 line 4457 of ../debugger/gdbmidebugger.pp
  $0000000100AA093B line 11170 of ../debugger/gdbmidebugger.pp
Project: optimization 1, not smart linkable, not link smart, debugging:
dwarf with sets (-gw -godwarfsets), line numbers -gl
Lazarus had been started with
--debug-log=d:\cop\t\lazarusdebuglog.txt
--debug-enable=DBG_CMD_ECHO,DBG_STATE,DBG_DATA_MONITORS,DBGMI_QUEUE_DEBUG,DBGMI_TYPE_INFO

I was stepping through the code after a breakpoint.
Log uploaded to
http://ubuntuone.com/23HCSALi9ZznQxD77b9jeJ

Thanks,
Reinier