StacktraceTop: __libc_message (do_abort=do_abort@entry=2, fmt=fmt@entry=0x7ffff6a86860 "*** Error in `%s': %s: 0x%s ***\n") at ../sysdeps/unix/sysv/linux/libc_fatal.c:199 malloc_printerr (ptr=0x7fffc8002170, str=0x7ffff6a86a28 "double free or corruption (fasttop)", action=3) at malloc.c:4902 _int_free (av=<optimized out>, p=0x7fffc8002160, have_lock=0) at malloc.c:3758 initialize_backend (cbdav=cbdav@entry=0x2789180, perror=perror@entry=0x7fffd3ffec98) at e-cal-backend-caldav.c:2818 caldav_do_open (backend=0x2789180, cal=<optimized out>, cancellable=0x7fffd8021450, only_if_exists=<optimized out>, perror=0x7fffd3ffec98) at e-cal-backend-caldav.c:2912
StacktraceTop: do_abort@ entry=2, fmt=fmt@ entry=0x7ffff6a 86860 "*** Error in `%s': %s: 0x%s ***\n") at ../sysdeps/ unix/sysv/ linux/libc_ fatal.c: 199 2170, str=0x7ffff6a86a28 "double free or corruption (fasttop)", action=3) at malloc.c:4902 cbdav@entry= 0x2789180, perror= perror@ entry=0x7fffd3f fec98) at e-cal-backend- caldav. c:2818 0x7fffd8021450, only_if_ exists= <optimized out>, perror= 0x7fffd3ffec98) at e-cal-backend- caldav. c:2912
__libc_message (do_abort=
malloc_printerr (ptr=0x7fffc800
_int_free (av=<optimized out>, p=0x7fffc8002160, have_lock=0) at malloc.c:3758
initialize_backend (cbdav=
caldav_do_open (backend=0x2789180, cal=<optimized out>, cancellable=