Description of problem:
Evolution was just running.  Don't know if anything was happening in the background (i.e. fetching new email, syncing calendars, etc).  I go to Evolution and it starts popping up it's messages about tasks quitting unexpectedly, so-and-so calendar quitting unexpectedly, etc.

Version-Release number of selected component:
evolution-data-server-3.8.5-6.fc19

Additional info:
reporter:       libreport-2.2.2
backtrace_rating: 4
cmdline:        /usr/libexec/evolution-calendar-factory
crash_function: strspn
executable:     /usr/libexec/evolution-calendar-factory
kernel:         3.14.19-100.fc19.x86_64
runlevel:       N 5
type:           CCpp
uid:            1000
var_log_messages: Oct  8 08:54:20 localhost abrt-hook-ccpp[27671]: Saved core dump of pid 19511 (/usr/libexec/evolution-calendar-factory) to /var/tmp/abrt/ccpp-2014-10-08-08:54:18-19511 (336252928 bytes)

Truncated backtrace:
Thread no. 1 (10 frames)
 #0 strspn at ../sysdeps/x86_64/multiarch/strspn.S:37
 #1 memset at /usr/include/bits/string3.h:84
 #2 e_memchunk_alloc0 at e-memory.c:151
 #3 e_sexp_result_new at e-sexp.c:191
 #4 e_cal_backend_sexp_func_make_time at e-cal-backend-sexp.c:1396
 #5 e_sexp_term_eval at e-sexp.c:784
 #7 e_sexp_eval at e-sexp.c:1698
 #8 e_cal_backend_sexp_match_comp at e-cal-backend-sexp.c:1254
 #9 e_data_cal_view_component_matches at e-data-cal-view.c:966
 #10 e_cal_backend_notify_component_created at e-cal-backend.c:1750