crash when using xdmcp to login to a remote PC

[matthew symes]

I think this may be raised against the correct package.

I am having a crash when using xdmcp with lightdm when trying to log in to a remote PC over my network.

After running this command on a virtual terminal ...

X -query omega.mcs-home.com :4

i am getting this stack trace.

Initializing built-in extension DRI2
Loading extension GLX
(EE) Fatal server error:
(EE) BUG: triggered 'if (f[f_idx])'
(EE) BUG: ../../os/log.c:467 in pnprintf(
(EE) Unsupported printf directive '*'
(EE)
(EE) Backtrace:
(EE) 0: X (xorg_backtrace+0x48) [0x7f569b0e8848]
(EE) 1: X (LogVMessageVerbSigSafe+0x87d) [0x7f569b0f480d]
(EE) 2: X (FatalError+0xd5) [0x7f569b0f4ad5]
(EE) 3: X (0x7f569af3f000+0x1b7c24) [0x7f569b0f6c24]
(EE) 4: X (0x7f569af3f000+0x1b80bd) [0x7f569b0f70bd]
(EE) 5: X (WakeupHandler+0x6d) [0x7f569af9988d]
(EE) 6: X (WaitForSomething+0x1bf) [0x7f569b0e5d9f
(EE) 7: X (0x7f569af3f000+0x55c61) [0x7f569af94c61]
(EE) 8: X (0x7f569af3f000+0x59d9a) [0x7f569af98d9a]
(EE) 9: /lib/x86_64-linux-gnu/libc.so.6 (__libc_start_main+0xf5) [0x7f5698a7cec5]
(EE) 10: X (0x7f569af3f000+0x451ee) [0x7f569af841ee]
(EE) XDMCP fatal error: Session failed %*.*s
(EE) Please consult the The X.Org Foundation support at http://wiki.x.org
(EE) Please also check the log file at "/var/log/Xorg.4.log" for additional information.
(EE) Server terminated with error (1). Closing log file.

This has started happening after the most recent updates that i installed on 25/03/2015.

If there is any more information you need, i can supply it for you.

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.