On an extended scan in debug mode, I had a crash with the following stack trace after running for a few minutes
Exception: STATUS_ACCESS_VIOLATION at rip=003FF2132D2
rax=0000000000000000 rbx=0000000000000000 rcx=0000000000000000
rdx=0000000000000000 rsi=0000000800729290 rdi=000000080072AA40
r8 =0000000800729290 r9 =0000000000000000 r10=0000000100000000
r11=00000008007299B0 r12=0000000000000000 r13=00000008007299B0
r14=00000000FFFF6260 r15=00000000FFFF62B0
rbp=0000000000000000 rsp=00000000FFFF60D8
program=R:\Utilities\THC-Hydra\hydra.exe, pid 1379, thread main
cs=0033 ds=002B es=002B fs=0053 gs=002B ss=002B
Stack trace:
Frame Function Args
00000000000 003FF2132D2 (003FF2126FB, 00800728900, 000FFFF6260, 000FFFF62B0)
00000000000 003FF20FE67 (003FB90E696, 0080072AAC0, 008007288E0, 0080072AA40)
00000000000 003FB90E7EC (003FB942891, 00800728950, 00800727DF0, 000FFFF62B0)
00000000000 003FB90EB6A (00800727DF0, 00000000400, 00800728950, 000FFFF62A8)
00000000000 003FB90A73F (00000000000, 00800728930, 00000000400, 00180321DB0)
00000000000 003FB910DE3 (00000000344, 00180321DB0, 00000000014, 00800727DF0)
00000000014 003FB91A9EA (00180321DB0, 00800727D80, 00000000014, 00000000344)
00000000348 003FB91AF5B (000FFFF6470, 00000001000, 00000000000, 003FB94653B)
003FB91AAE0 003FB92459F (00000000001, 00300001170, 0018013BCFB, 000001B4E41)
00180321DB0 003FB9211C8 (00800728B80, 000001B4E41, 0000C30C468, 00800728730)
00800727D80 003FB92206A (00800727DF0, 00000000022, 003FB923CEC, 000001B4E40)
00800727DF0 003FB92212B (001801B974F, 00000000000, 00000001388, 003FB9629D0)
0000000003C 003FB90AA9F (00800076540, 008006E79B0, 00000000016, 00800726DB4)
0000000003C 001004215EE (00000000000, 00000000000, 00000000130, 0080006E518)
0000000003C 001004040DF (0080008914E, 00800077830, 00800077870, 00100464250)
000FFFF78C0 001004416EA (001803647D0, 0000000000E, 00180058D51, 00180362090)
000FFFFCCE0 0018004AE9D (00000000000, 00000000000, 00000000000, 00000000000)
000FFFFFFF0 00180048886 (00000000000, 00000000000, 00000000000, 00000000000)
000FFFFFFF0 00180048934 (00000000000, 00000000000, 00000000000, 00000000000)
End of stack trace