Bug 698177

snippet from /var/log/messages

Apr 20 03:35:57 spruce dbus: [system] Successfully activated service 'net.reactivated.Fprint'
Apr 20 03:37:32 spruce pam: gdm-password[1243]: CRITICAL: act_user_manager_get_user: assertion `username != NULL && username[0] != '\0'' failed
Apr 20 03:37:32 spruce gdm[1296]: ******************* START **********************************
Apr 20 03:37:34 spruce gdm[1296]: [Thread debugging using libthread_db enabled]
Apr 20 03:37:35 spruce gdm[1296]: 0x00367416 in __kernel_vsyscall ()
Apr 20 03:37:35 spruce gdm[1296]: #0  0x00367416 in __kernel_vsyscall ()
Apr 20 03:37:35 spruce gdm[1296]: #1  0x49ee45a3 in __waitpid_nocancel () at ../sysdeps/unix/syscall-template.S:82
Apr 20 03:37:35 spruce gdm[1296]: #2  0x0805568d in ?? ()
Apr 20 03:37:35 spruce gdm[1296]: #3  0x08055aa9 in ?? ()
Apr 20 03:37:35 spruce gdm[1296]: #4  <signal handler called>
Apr 20 03:37:35 spruce gdm[1296]: #5  0x4e2f4014 in act_user_is_loaded () from /usr/lib/libaccountsservice.so.0
Apr 20 03:37:35 spruce gdm[1296]: #6  0x0804d6e9 in ?? ()
Apr 20 03:37:35 spruce gdm[1296]: #7  0x0804e7a4 in ?? ()
Apr 20 03:37:35 spruce gdm[1296]: #8  0x0804efb8 in ?? ()
Apr 20 03:37:35 spruce gdm[1296]: #9  0x4b3d27a5 in pam_vprompt () from /lib/libpam.so.0
Apr 20 03:37:35 spruce gdm[1296]: #10 0x4b3d296c in pam_prompt () from /lib/libpam.so.0
Apr 20 03:37:35 spruce gdm[1296]: #11 0x00beda20 in ?? () from /lib/security/pam_unix.so
Apr 20 03:37:35 spruce gdm[1296]: #12 0x00beb1c8 in pam_sm_authenticate () from /lib/security/pam_unix.so
Apr 20 03:37:35 spruce gdm[1296]: #13 0x4b3cd615 in ?? () from /lib/libpam.so.0
Apr 20 03:37:35 spruce gdm[1296]: #14 0x4b3ccd14 in pam_authenticate () from /lib/libpam.so.0
Apr 20 03:37:35 spruce gdm[1296]: #15 0x080509bb in ?? ()
Apr 20 03:37:35 spruce gdm[1296]: #16 0x4d7ea851 in g_idle_dispatch (source=0x9641200, callback=0x8050670, user_data=0x9639000) at gmain.c:4545
Apr 20 03:37:35 spruce gdm[1296]: #17 0x4d7ee7ff in g_main_dispatch (context=0x9636e88) at gmain.c:2440
Apr 20 03:37:35 spruce gdm[1296]: #18 g_main_context_dispatch (context=0x9636e88) at gmain.c:3013
Apr 20 03:37:35 spruce gdm[1296]: #19 0x4d7eef70 in g_main_context_iterate (context=0x9636e88, block=1300225200, dispatch=1, self=0x9629858) at gmain.c:3091
Apr 20 03:37:35 spruce gdm[1296]: #20 0x4d7ef697 in g_main_loop_run (loop=0x96374b8) at gmain.c:3299
Apr 20 03:37:35 spruce gdm[1296]: #21 0x0804bdff in ?? ()
Apr 20 03:37:35 spruce gdm[1296]: #22 0x49d5f513 in __libc_start_main (main=0x804bb80, argc=1, ubp_av=0xbfaaaa94, init=0x8057310, fini=0x8057380, rtld_fini=0x49d329b0 <_dl_fini>, stack_end=0xbfaaaa8c) at libc-start.c:226
Apr 20 03:37:35 spruce gdm[1296]: #23 0x0804beb5 in ?? ()
Apr 20 03:37:35 spruce gdm[1296]: Backtrace stopped: Not enough registers or memory available to unwind further
Apr 20 03:37:35 spruce gdm[1296]: 
Apr 20 03:37:35 spruce gdm[1296]: Thread 1 (Thread 0xb78078d0 (LWP 1243)):
Apr 20 03:37:35 spruce gdm[1296]: #0  0x00367416 in __kernel_vsyscall ()

Created attachment 493445 [details]
/var/log/messages with gdm backtrace

A reproducer is:

1. Select "Other..."
2. Press Enter (leave "Username" empty)

This package has changed ownership in the Fedora Package Database.  Reassigning to the new owner of this component.

This package has changed ownership in the Fedora Package Database.  Reassigning to the new owner of this component.

This package has changed ownership in the Fedora Package Database.  Reassigning to the new owner of this component.

This package has changed ownership in the Fedora Package Database.  Reassigning to the new owner of this component.

This package has changed ownership in the Fedora Package Database.  Reassigning to the new owner of this component.

This package has changed ownership in the Fedora Package Database.  Reassigning to the new owner of this component.

This package has changed ownership in the Fedora Package Database.  Reassigning to the new owner of this component.

This package has changed ownership in the Fedora Package Database.  Reassigning to the new owner of this component.

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