I just upgraded from 15xx to 1684 (newer than the one above) and am getting a similar crash:
2016-03-16 00:26:42.209 [ ALERT] CRASH: Signal: 11 in PRG: /usr/bin/tvheadend (4.1-1684~g42c9423d) [2758346d60ac43fbb88a0eebcfd65e7a8ed138ce] CWD: /home/erik
2016-03-16 00:26:42.209 [ ALERT] CRASH: Fault address (nil) (Address not mapped)
2016-03-16 00:26:42.209 [ ALERT] CRASH: Loaded libraries: /lib/x86_64-linux-gnu/libssl.so.1.0.0 /lib/x86_64-linux-gnu/libcrypto.so.1.0.0 /lib/x86_64-linux-gnu/libz.so.1 /usr/lib/liburiparser.so.1 /usr/lib/x86_64-linux-gnu/libavahi-common.so.3 /usr/lib/x86_64-linux-gnu/libavahi-client.so.3 /lib/x86_64-linux-gnu/libdbus-1.so.3 /lib/x86_64-linux-gnu/libdl.so.2 /lib/x86_64-linux-gnu/libpthread.so.0 /lib/x86_64-linux-gnu/libm.so.6 /lib/x86_64-linux-gnu/librt.so.1 /lib/x86_64-linux-gnu/libc.so.6 /lib64/ld-linux-x86-64.so.2 /lib/x86_64-linux-gnu/libnss_compat.so.2 /lib/x86_64-linux-gnu/libnsl.so.1 /lib/x86_64-linux-gnu/libnss_nis.so.2 /lib/x86_64-linux-gnu/libnss_files.so.2
2016-03-16 00:26:42.209 [ ALERT] CRASH: Register dump [23]: 000000000000000100007fab262847b8000000000000000800007fab2604c87000000000000000000000000002bcd8c0000000000001fafe000000000001fafe0000000000b72e410000000000000000000000000000000000007fab27e5f00400000000000000000000000000000000000000000000000700007fffa56bdc900000000000450e5f000000000001024600000000000000330000000000000004000000000000000efffffffe7ffbfa170000000000000000
2016-03-16 00:26:42.209 [ ALERT] CRASH: STACKTRACE
2016-03-16 00:26:42.248 [ ALERT] CRASH: ??:0 0x46f059
2016-03-16 00:26:42.250 [ ALERT] CRASH: ??:0 0x7fab267a9340
2016-03-16 00:26:42.281 [ ALERT] CRASH: ??:0 0x450e5f
2016-03-16 00:26:42.311 [ ALERT] CRASH: ??:0 0x42f6bb
2016-03-16 00:26:42.311 [ ALERT] CRASH:
libc_start_main+0xf5 (/lib/x86_64-linux-gnu/libc.so.6)