$ MANGOHUD=1 valgrind vkcube
==6815== Memcheck, a memory error detector
==6815== Copyright (C) 2002-2017, and GNU GPL'd, by Julian Seward et al.
==6815== Using Valgrind-3.15.0 and LibVEX; rerun with -h for copyright info
==6815== Command: vkcube
==6815==
==6815== Conditional jump or move depends on uninitialised value(s)
==6815==    at 0x67C3EBA: ??? (in /usr/lib/libnvidia-glcore.so.440.44)
==6815==    by 0x6816C72: ??? (in /usr/lib/libnvidia-glcore.so.440.44)
==6815==    by 0x681CEB4: ??? (in /usr/lib/libnvidia-glcore.so.440.44)
==6815==    by 0x681CFA7: ??? (in /usr/lib/libnvidia-glcore.so.440.44)
==6815==    by 0x677CACC: ??? (in /usr/lib/libnvidia-glcore.so.440.44)
==6815==    by 0x11114F: ??? (in /usr/bin/vkcube)
==6815==    by 0x10C634: ??? (in /usr/bin/vkcube)
==6815==    by 0x4A7C152: (below main) (in /usr/lib/libc-2.30.so)
==6815==
==6815== Conditional jump or move depends on uninitialised value(s)
==6815==    at 0x67C3EBA: ??? (in /usr/lib/libnvidia-glcore.so.440.44)
==6815==    by 0x6816C72: ??? (in /usr/lib/libnvidia-glcore.so.440.44)
==6815==    by 0x681CEB4: ??? (in /usr/lib/libnvidia-glcore.so.440.44)
==6815==    by 0x681CFE5: ??? (in /usr/lib/libnvidia-glcore.so.440.44)
==6815==    by 0x677CACC: ??? (in /usr/lib/libnvidia-glcore.so.440.44)
==6815==    by 0x11114F: ??? (in /usr/bin/vkcube)
==6815==    by 0x10C634: ??? (in /usr/bin/vkcube)
==6815==    by 0x4A7C152: (below main) (in /usr/lib/libc-2.30.so)
==6815==
==6815== Conditional jump or move depends on uninitialised value(s)
==6815==    at 0x67C3EBA: ??? (in /usr/lib/libnvidia-glcore.so.440.44)
==6815==    by 0x6816C72: ??? (in /usr/lib/libnvidia-glcore.so.440.44)
==6815==    by 0x681CEB4: ??? (in /usr/lib/libnvidia-glcore.so.440.44)
==6815==    by 0x681D08E: ??? (in /usr/lib/libnvidia-glcore.so.440.44)
==6815==    by 0x677C621: ??? (in /usr/lib/libnvidia-glcore.so.440.44)
==6815==    by 0x110F5C: ??? (in /usr/bin/vkcube)
==6815==    by 0x10C634: ??? (in /usr/bin/vkcube)
==6815==    by 0x4A7C152: (below main) (in /usr/lib/libc-2.30.so)
==6815==
==6815== Thread 3:
==6815== Invalid read of size 4
==6815==    at 0x4AAE027: __vfscanf_internal (in /usr/lib/libc-2.30.so)
==6815==    by 0x4AAD74C: __isoc99_fscanf (in /usr/lib/libc-2.30.so)
==6815==    by 0x90483F1: ??? (in /usr/lib/libMangoHud.so)
==6815==    by 0x4C394CE: start_thread (in /usr/lib/libpthread-2.30.so)
==6815==    by 0x4B542D2: clone (in /usr/lib/libc-2.30.so)
==6815==  Address 0xc0 is not stack'd, malloc'd or (recently) free'd
==6815==
==6815==
==6815== Process terminating with default action of signal 11 (SIGSEGV): dumping core
==6815==  Access not within mapped region at address 0xC0
==6815==    at 0x4AAE027: __vfscanf_internal (in /usr/lib/libc-2.30.so)
==6815==    by 0x4AAD74C: __isoc99_fscanf (in /usr/lib/libc-2.30.so)
==6815==    by 0x90483F1: ??? (in /usr/lib/libMangoHud.so)
==6815==    by 0x4C394CE: start_thread (in /usr/lib/libpthread-2.30.so)
==6815==    by 0x4B542D2: clone (in /usr/lib/libc-2.30.so)
==6815==  If you believe this happened as a result of a stack
==6815==  overflow in your program's main thread (unlikely but
==6815==  possible), you can try to increase the size of the
==6815==  main thread stack using the --main-stacksize= flag.
==6815==  The main thread stack size used in this run was 8388608.
==6815==
==6815== HEAP SUMMARY:
==6815==     in use at exit: 8,160,193 bytes in 3,820 blocks
==6815==   total heap usage: 14,361 allocs, 10,541 frees, 397,277,597 bytes allocated
==6815==
==6815== LEAK SUMMARY:
==6815==    definitely lost: 20,472 bytes in 16 blocks
==6815==    indirectly lost: 249,948 bytes in 1,360 blocks
==6815==      possibly lost: 492,759 bytes in 144 blocks
==6815==    still reachable: 7,397,014 bytes in 2,300 blocks
==6815==                       of which reachable via heuristic:
==6815==                         newarray           : 34,592 bytes in 20 blocks
==6815==                         multipleinheritance: 208 bytes in 2 blocks
==6815==         suppressed: 0 bytes in 0 blocks
==6815== Rerun with --leak-check=full to see details of leaked memory
==6815==
==6815== Use --track-origins=yes to see where uninitialised values come from
==6815== For lists of detected and suppressed errors, rerun with: -s
==6815== ERROR SUMMARY: 17 errors from 4 contexts (suppressed: 0 from 0)
[1]    6815 segmentation fault (core dumped)  MANGOHUD=1 valgrind vkcube