==84481==ERROR: AddressSanitizer: SEGV on unknown address 0xfffffffffffffa00 (pc 0x0001048c5e00 bp 0x00016b5f7c70 sp 0x00016b5f7bc0 T1)
==84481==The signal is caused by a READ memory access.
    #0 0x1048c5e00 in void Position::play<Color{1u}>(Move) position.cpp:202
    #1 0x104902254 in int q_search<Color{1u}>(SearchData&, ThreadData&, Position&, int, int, int) pvs.cpp:90
    #2 0x1048f8d90 in int pvs<Color{1u}>(SearchData&, ThreadData&, Position&, short, int, int, int, bool) pvs.cpp:145
    #3 0x1048f6c8c in int pvs<Color{}>(SearchData&, ThreadData&, Position&, short, int, int, int, bool) pvs.cpp:239
    #4 0x1048f964c in int pvs<Color{1u}>(SearchData&, ThreadData&, Position&, short, int, int, int, bool) pvs.cpp:239
    #5 0x1048f6c8c in int pvs<Color{}>(SearchData&, ThreadData&, Position&, short, int, int, int, bool) pvs.cpp:239
    #6 0x1048f964c in int pvs<Color{1u}>(SearchData&, ThreadData&, Position&, short, int, int, int, bool) pvs.cpp:239
    #7 0x1048f6cd0 in int pvs<Color{}>(SearchData&, ThreadData&, Position&, short, int, int, int, bool) pvs.cpp:243
    #8 0x1048f960c in int pvs<Color{1u}>(SearchData&, ThreadData&, Position&, short, int, int, int, bool) pvs.cpp:237
    #9 0x1048f6c4c in int pvs<Color{}>(SearchData&, ThreadData&, Position&, short, int, int, int, bool) pvs.cpp:237
    #10 0x1048f960c in int pvs<Color{1u}>(SearchData&, ThreadData&, Position&, short, int, int, int, bool) pvs.cpp:237
    #11 0x1048f6c4c in int pvs<Color{}>(SearchData&, ThreadData&, Position&, short, int, int, int, bool) pvs.cpp:237
    #12 0x1048f960c in int pvs<Color{1u}>(SearchData&, ThreadData&, Position&, short, int, int, int, bool) pvs.cpp:237
    #13 0x1048f6c4c in int pvs<Color{}>(SearchData&, ThreadData&, Position&, short, int, int, int, bool) pvs.cpp:237
    #14 0x1048f960c in int pvs<Color{1u}>(SearchData&, ThreadData&, Position&, short, int, int, int, bool) pvs.cpp:237
    #15 0x1048f6c4c in int pvs<Color{}>(SearchData&, ThreadData&, Position&, short, int, int, int, bool) pvs.cpp:237
    #16 0x1048f57fc in search(SearchData&, ThreadData&, Position&, SearchParameters&) pvs.cpp:339
    #17 0x104914f90 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 0x104919894 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)

==84481==Register values:
 x[0] = 0xfffffffffffffd00   x[1] = 0x0000000000000080   x[2] = 0x0000000000000222   x[3] = 0x000000016b605238
 x[4] = 0xfffffffffffffa00   x[5] = 0x0000000000000020   x[6] = 0x000000000000008d   x[7] = 0x0000000000000001
 x[8] = 0xfffffffffffffa00   x[9] = 0x0000000104ec2780  x[10] = 0x0000000104ec27b0  x[11] = 0xfffffffffffffa0f
x[12] = 0x0000000000000000  x[13] = 0x0000000000000018  x[14] = 0x0000007000020000  x[15] = 0x0000000000000000
x[16] = 0x0000000104ea0580  x[17] = 0x0000000000000180  x[18] = 0x0000000000000000  x[19] = 0x000000016b5fd4f8
x[20] = 0x0000000000000008  x[21] = 0x0000000000000036  x[22] = 0x000000702d6dfa9f  x[23] = 0x0000000000000002
x[24] = 0x0000000000000035  x[25] = 0x0000000000000000  x[26] = 0x000000010494cea0  x[27] = 0x000000010494cea0
x[28] = 0x000000010494d140     fp = 0x000000016b5f7c70     lr = 0x00000001048c3924     sp = 0x000000016b5f7bc0
AddressSanitizer can not provide additional info.
SUMMARY: AddressSanitizer: SEGV position.cpp:202 in void Position::play<Color{1u}>(Move)
Thread T1 created by T0 here:
    #0 0x105370d2c in wrap_pthread_create+0x54 (libclang_rt.asan_osx_dynamic.dylib:arm64e+0x3cd2c) (BuildId: f0a7ac5c49bc3abc851181b6f92b308a32000000200000000100000000000b00)
    #1 0x1049192b4 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 0x10491859c in datagen(int, std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char>> const&) datagen.cpp:126
    #3 0x10487f3e8 in main main.cpp:10
    #4 0x1870a3f24  (<unknown module>)

==84481==ABORTING
zsh: abort      ./midnight datagen 1 /Users/archishmaan/Desktop/
archishmaan@Archishmaans-MBP chess-engine % 3