kernel panic pressing any key in terminal that spawned emulator

Yup, this is fully repeatable. I'm starting the emulator like this:

$ ubuntu-emulator run test_x86

Are you able to reproduce the error when running with '--memory=1024' ?

Yes. And with --memory=2048 and --memory=4096. The crash is triggered by any key press fwiw.

What's interesting is that if I press a key immediately (that is to say *before* the kernel has started and the emulator is busy spewing out information on its config), the panic won't occur until after the kernel has started userland. But I will always get a panic at that post-userland-started point if I press the return early.

For example, if I press a key immediately, the panic doesn't occur until here:

[ 1.653795] init: cannot find '/system/etc/install-recovery.sh', disabling 'flash_recovery'
[ 1.653858] init: cannot find '/system/bin/ubuntuappmanager.disabled', disabling 'ubuntuappmanager'
[ 1.724046] init: property 'sys.powerctl' doesn't exist while expanding '${sys.powerctl}'
[ 1.724108] init: powerctl: cannot expand '${sys.powerctl}'
[ 1.724130] init: property 'sys.sysctl.extra_free_kbytes' doesn't exist while expanding '${sys.sysctl.extra_free_kbytes}'
[ 1.724149] init: cannot expand '${sys.sysctl.extra_free_kbytes}' while writing to '/proc/sys/vm/extra_free_kbytes'
[ 1.724271] init: cannot find '/sbin/adbd', disabling 'adbd'
[ 2.719492] systemd-logind[737]: cgmanager: cgm_list_children for controller=systemd, cgroup_path=user failed: invalid request
[ 4.166829] BUG: unable to handle kernel NULL pointer dereference at 000000bc
[ 4.166883] IP: [<c0478764>] tty_buffer_request_room+0x1d/0x128
[ 4.166920] *pde = 00000000
[ 4.166951] Oops: 0000 [#1] PREEMPT
[ 4.166994] Modules linked in:
[ 4.167025]
[ 4.167045] Pid: 933, comm: resolvconf Not tainted 3.4.0-3-goldfish #17-Ubuntu

Should be fixed by https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=64325a3be08d364a62ee8f84b2cf86934bc2544a

This bug was fixed in the package linux-goldfish - 3.4.0-4.20

---------------
linux-goldfish (3.4.0-4.20) utopic; urgency=low

  [ Tim Gardner ]

  * [Config] updateconfigs (fixes FTBS)
 -- Tim Gardner <email address hidden> Thu, 17 Jul 2014 10:22:25 -0600

This bug was fixed in the package goget-ubuntu-touch - 0.3+14.10.20140807-0ubuntu1

---------------
goget-ubuntu-touch (0.3+14.10.20140807-0ubuntu1) utopic; urgency=low

  [ Paul Larson ]
  * Fix checking for free space in cache when it's mounted in a
    different location

  [ Jani Monoses ]
  * ubuntu-device-flash: Add --download-only flag. (LP: #1295148)

  [ Sergio Schvezov ]
  * Unhooking stdin from the emulator and removing -shell switch as it's
    not needed anymore (LP: #1329374)
 -- Ubuntu daily release <email address hidden> Thu, 07 Aug 2014 03:57:01 +0000