Hi,
I’m performing autoinstall with today’s daily-live focal-live-server-amd64.iso and in the user-data (autoinstall.yaml) file I’m refreshing subiquity from the edge (20.05.2+git63.4ef44df3). (I know, I like to live dangerously 
).
The recent change to subiquitycore/controllers/network.py appears to ‘cause’ an installer crash. The git commit comment says “update wlan dialog when scan results come in”
I’m confused by the error messages as I’m doing an autoinstall and my target server doesn’t have a wireless lan interface. Here are the final lines in the subiquity debug log:
2020-05-22 17:47:53,987 DEBUG probert.network:584 event for link_change: CHANGE {'ifindex': 2, 'flags': 69699, 'arptype': 1, 'family': 0, 'is_vlan': False, 'name': b'eno1'}
2020-05-22 17:47:53,987 DEBUG probert.network:584 event for addr_change: CHANGE {'ifindex': 2, 'flags': 128, 'family': 2, 'scope': 0, 'local': b'192.168.2.145/24'}
2020-05-22 17:47:53,987 DEBUG probert.network:671 link_change CHANGE {'ifindex': 2, 'flags': 69699, 'arptype': 1, 'family': 0, 'is_vlan': False, 'name': b'eno1'}
2020-05-22 17:47:53,987 DEBUG probert.network:716 addr_change CHANGE {'ifindex': 2, 'flags': 128, 'family': 2, 'scope': 0, 'local': b'192.168.2.145/24'}
2020-05-22 17:47:53,987 DEBUG subiquitycore.core:238 _exception_handler AttributeError("'ScrollBarListBox' object has no attribute '_w'",)
2020-05-22 17:47:53,989 ERROR subiquitycore.core:678 Exception in controller.run():
Traceback (most recent call last):
File "/snap/subiquity/1907/lib/python3.6/site-packages/subiquitycore/core.py", line 676, in run
self.urwid_loop.run()
File "/snap/subiquity/1907/usr/lib/python3/dist-packages/urwid/main_loop.py", line 286, in run
self._run()
File "/snap/subiquity/1907/usr/lib/python3/dist-packages/urwid/main_loop.py", line 384, in _run
self.event_loop.run()
File "/snap/subiquity/1907/usr/lib/python3/dist-packages/urwid/main_loop.py", line 1484, in run
reraise(*exc_info)
File "/snap/subiquity/1907/usr/lib/python3/dist-packages/urwid/compat.py", line 58, in reraise
raise value
File "/snap/subiquity/1907/usr/lib/python3.6/asyncio/events.py", line 145, in _run
self._callback(*self._args)
File "/snap/subiquity/1907/lib/python3.6/site-packages/subiquitycore/controllers/network.py", line 203, in _data_ready
if isinstance(v._w, StretchyOverlay):
AttributeError: 'ScrollBarListBox' object has no attribute '_w'
2020-05-22 17:47:53,991 DEBUG subiquity.core:466 generating crash report
2020-05-22 17:47:53,992 INFO subiquity.core:483 saving crash report 'Installer UI crashed with AttributeError' to /var/crash/1590169673.992039204.ui.crash
2020-05-22 17:47:53,992 DEBUG root:39 start: subiquity/Error/1590169673.992039204.ui/add_info:
2020-05-22 17:48:00,700 DEBUG root:39 finish: subiquity/Error/1590169673.992039204.ui/add_info: SUCCESS: written to /var/crash/1590169673.992039204.ui.crash
Not sure why ScrollBarListBox is required in an autoinstall (I assume this is associated with manual installs). I note that the probert.network has just detected the static IP address change (for the wired ethernet eno1 interface). Is the installer reacting to the wrong event somehow?
Thanks,
Bob