This is for v15.08 on Arch Linux.  The problem always occurs at start up.  
v15.04 does not have this issue (and is being used as a workaround)

strace output tail:
poll([{fd=3, events=POLLIN|POLLOUT}], 1, 4294967295) = 1 ([{fd=3, revents=POLLOUT}])
writev(3, [{"\232\f\3\0\24\0@\4\1\0\0\0\233\"\v\0\33\0@\4\254\0\0\0\0\0\0\0\30\0@\4"..., 60}], 1) = 60
futex(0x7ffd17e856f4, FUTEX_WAIT_PRIVATE, 1, NULL) = 0
futex(0x27eaaf8, FUTEX_WAKE_PRIVATE, 1) = 0
poll([{fd=3, events=POLLIN|POLLOUT}], 1, 4294967295) = 1 ([{fd=3, revents=POLLOUT}])
writev(3, [{"N\0\4\0\32\0@\0041\2\0\0\270\1\0\0\1\30\f\0\34\0@\0041\2\0\0\0\0\0\0"..., 80}, {NULL, 0}, {"", 0}], 3) = 80
poll([{fd=3, events=POLLIN|POLLOUT}], 1, 4294967295) = 1 ([{fd=3, revents=POLLOUT}])
writev(3, [{"\232\f\3\0\34\0@\4\1\0\0\0", 12}], 1) = 12
poll([{fd=3, events=POLLIN|POLLOUT}], 1, 4294967295) = 1 ([{fd=3, revents=POLLOUT}])
writev(3, [{"\232\7\5\0\34\0@\4\1\0\0\0\1\0\0\0\30\0\0\0", 20}, {NULL, 0}, {"", 0}], 3) = 20
futex(0x7ffd17e85234, FUTEX_WAIT_PRIVATE, 1, NULL) = 0
futex(0x27eaaf8, FUTEX_WAKE_PRIVATE, 1) = 0
ioctl(21, DRM_IOCTL_GEM_OPEN, 0x7ffd17e85380) = 0
ioctl(21, DRM_IOCTL_NOUVEAU_GEM_INFO, 0x7ffd17e85310) = 0
ioctl(21, DRM_IOCTL_NOUVEAU_GEM_NEW, 0x7ffd17e85300) = 0
ioctl(21, DRM_IOCTL_NOUVEAU_GEM_PUSHBUF, 0x7ffd17e855a0) = 0
poll([{fd=3, events=POLLIN|POLLOUT}], 1, 4294967295) = 1 ([{fd=3, revents=POLLOUT}])
writev(3, [{"\4\7\2\0\34\0@\4\233\33\r\0\0\0\0\0\254\0\0\0\35\0@\4\4\0\0\0A\200\0\0"..., 84}, {NULL, 0}, {"", 0}], 3) = 84
mmap(NULL, 8392704, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7feceeab2000
mprotect(0x7feceeab2000, 4096, PROT_NONE) = 0
clone(child_stack=0x7fecef2b1ef0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tidptr=0x7fecef2b29d0, tls=0x7fecef2b2700, child_tidptr=0x7fecef2b29d0) = 25690
--- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_MAPERR, si_addr=0x8} ---
+++ killed by SIGSEGV (core dumped) +++
[1]    25665 segmentation fault (core dumped)  strace kdenlive | 
       25666 done                              tee kdenlive.strace
strace kdenlive  4.38s user 6.47s system 27% cpu 39.144 total
tee kdenlive.strace  0.00s user 0.00s system 0% cpu 39.142 total


Reproducible: Always

Steps to Reproduce:
1. start kdenlive, I do it from the command line to get feedback to progress
2. wait a couple of seconds
 

Actual Results:  
kdenlive coredumps and exits

Expected Results:  
kdenlive starts operating

Core dump file for kdenlive and the strace available at http://jamhome.us/kdenlive_coredump.tgz