Total Fens Collected: 223798 FENS/S: 66
    #0 0x1000246c8 in void Position::move_piece<true>(Square, Square) position.cpp:51
    #1 0x100063260 in void Position::play<Color{1u}>(Move) position.cpp:204
    #2 0x1000a20ac in int pvs<Color{1u}>(SearchData&, ThreadData&, Position&, short, int, int, int, bool) pvs.cpp:225
    #3 0x1000a03e0 in int pvs<Color{}>(SearchData&, ThreadData&, Position&, short, int, int, int, bool) pvs.cpp:239
    #4 0x1000a21a8 in int pvs<Color{1u}>(SearchData&, ThreadData&, Position&, short, int, int, int, bool) pvs.cpp:239
    #5 0x1000a03a0 in int pvs<Color{}>(SearchData&, ThreadData&, Position&, short, int, int, int, bool) pvs.cpp:237
    #6 0x1000a2168 in int pvs<Color{1u}>(SearchData&, ThreadData&, Position&, short, int, int, int, bool) pvs.cpp:237
    #7 0x1000a03a0 in int pvs<Color{}>(SearchData&, ThreadData&, Position&, short, int, int, int, bool) pvs.cpp:237
    #8 0x1000a2168 in int pvs<Color{1u}>(SearchData&, ThreadData&, Position&, short, int, int, int, bool) pvs.cpp:237
    #9 0x1000a03a0 in int pvs<Color{}>(SearchData&, ThreadData&, Position&, short, int, int, int, bool) pvs.cpp:237
    #10 0x1000a2168 in int pvs<Color{1u}>(SearchData&, ThreadData&, Position&, short, int, int, int, bool) pvs.cpp:237
    #11 0x1000a03a0 in int pvs<Color{}>(SearchData&, ThreadData&, Position&, short, int, int, int, bool) pvs.cpp:237
    #12 0x1000a2168 in int pvs<Color{1u}>(SearchData&, ThreadData&, Position&, short, int, int, int, bool) pvs.cpp:237
    #13 0x1000a03a0 in int pvs<Color{}>(SearchData&, ThreadData&, Position&, short, int, int, int, bool) pvs.cpp:237
    #14 0x1000a2168 in int pvs<Color{1u}>(SearchData&, ThreadData&, Position&, short, int, int, int, bool) pvs.cpp:237
    #15 0x1000a03a0 in int pvs<Color{}>(SearchData&, ThreadData&, Position&, short, int, int, int, bool) pvs.cpp:237
    #16 0x10009b060 in void iterative_deepening<Color{}>(SearchData&, ThreadData&, Position&, SearchParameters&) pvs.cpp:330
    #17 0x1000c4400 in single_thread_datagen(std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char>> const&, std::__1::atomic<unsigned long>&, std::__1::atomic<bool>&) datagen.cpp:78
    #18 0x1000c8d38 in void* std::__1::__thread_proxy[abi:v15006]<std::__1::tuple<std::__1::unique_ptr<std::__1::__thread_struct, std::__1::default_delete<std::__1::__thread_struct>>, datagen(int, std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char>> const&)::$_0>>(void*) thread:301
    #19 0x1873fbfa4 in _pthread_start+0x90 (libsystem_pthread.dylib:arm64e+0x6fa4) (BuildId: b401cfb38dfe32db92b3ba8af0f8ca6e32000000200000000100000000030d00)
    #20 0x1873f6d9c in thread_start+0x4 (libsystem_pthread.dylib:arm64e+0x1d9c) (BuildId: b401cfb38dfe32db92b3ba8af0f8ca6e32000000200000000100000000030d00)

==49907==Register values:
 x[0] = 0xfffffffffffffd01   x[1] = 0x0000000000000179   x[2] = 0x000000002dfcfa92   x[3] = 0x000000016fe7d498
 x[4] = 0xfffffffffffffa00   x[5] = 0x0000000000000020   x[6] = 0x000000000000006f   x[7] = 0x0000000000000070
 x[8] = 0xfffffffffffffa01   x[9] = 0xfffffffffffffa10  x[10] = 0x0000000000000000  x[11] = 0x0000000000000000
x[12] = 0x0000000000000007  x[13] = 0x0000000000000001  x[14] = 0x0000000000042180  x[15] = 0x00000001000f43c0
x[16] = 0x000000010002451c  x[17] = 0x0000000100b745e8  x[18] = 0x0000000000000000  x[19] = 0x000000016fe75600
x[20] = 0x0000000000000000  x[21] = 0x000000000000000d  x[22] = 0x000000016fe7d490  x[23] = 0x000000016fe7d488
x[24] = 0x000000002dfcead0  x[25] = 0x000000016fe75684  x[26] = 0x0000000000000001  x[27] = 0x0000007000020000
x[28] = 0x0000000100648880     fp = 0x000000016fe70570     lr = 0x0000000100024594     sp = 0x000000016fe70510
AddressSanitizer can not provide additional info.
SUMMARY: AddressSanitizer: SEGV position.cpp:51 in void Position::move_piece<true>(Square, Square)
Thread T1 created by T0 here:
    #0 0x100b1cd2c in wrap_pthread_create+0x54 (libclang_rt.asan_osx_dynamic.dylib:arm64e+0x3cd2c) (BuildId: f0a7ac5c49bc3abc851181b6f92b308a32000000200000000100000000000b00)
    #1 0x1000c8844 in void std::__1::allocator_traits<std::__1::allocator<std::__1::thread>>::construct[abi:v15006]<std::__1::thread, datagen(int, std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char>> const&)::$_0, void, void>(std::__1::allocator<std::__1::thread>&, std::__1::thread*, datagen(int, std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char>> const&)::$_0&&) allocator_traits.h:298
    #2 0x1000c7118 in datagen(int, std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char>> const&) datagen.cpp:126
    #3 0x10000baf0 in main main.cpp:10
    #4 0x1870a3f24  (<unknown module>)

==49907==ABORTING
zsh: abort      ./midnight datagen 1 /Users/archishmaan/Desktop/
archishmaan@Archishmaans-MBP chess-engine %