Building hashcat v3.20

Thanks for the release :-). I've upgraded from 3.10 to 3.20 although I get the following and I'm not sure where to go from here.
It's a clean build.

Ubuntu 16.04 Server
amdgpu-pro

./hashcat -b

*** Error in `./hashcat': double free or corruption (!prev): 0x000000000169a280 ***
======= Backtrace: =========
/lib/x86_64-linux-gnu/libc.so.6(+0x777e5)[0x7fc9449e07e5]
/lib/x86_64-linux-gnu/libc.so.6(+0x7fe0a)[0x7fc9449e8e0a]
/lib/x86_64-linux-gnu/libc.so.6(cfree+0x4c)[0x7fc9449ec98c]
/lib/x86_64-linux-gnu/libc.so.6(fclose+0x103)[0x7fc9449d6363]
./hashcat[0x447203]
./hashcat[0x44aa0f]
./hashcat[0x4139a6]
./hashcat[0x40251c]
/lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0xf0)[0x7fc944989830]
./hashcat[0x4025d9]