Log viewer doesn't display if there's no Dev info for navigator object

[aaclause]

Steps to reproduce:

1. Open this URL in Firefox: data:text/html,<p></p>
2. Press NVDA+f1

Actual behavior:

Log viewer doesn't display and the following error is logged:

Traceback (most recent call last):
File "scriptHandler.pyc", line 187, in executeScript
File "globalCommands.pyc", line 1450, in script_navigatorObject_devInfo
AttributeError: 'NoneType' object has no attribute 'devInfo'

Expected behavior:

Log viewer should be display

System configuration:

NVDA Installed/portable/running from source:

Any

NVDA version:

alpha-15781,d58e1cd4

Windows version:

Any

Name and version of other software in use when reproducing the issue:

Any

Other information about your system:

None

Other questions:

Does the issue still occur after restarting your PC?

Yes

Have you tried any other versions of NVDA?

No