#include <Core/Core.h>
#include <portaudio.h>

using namespace Upp;

void test() {
    Pa_Initialize();
}

INITBLOCK {
    test();
}

int main(int argc, const char *argv[]) {
	return 0;
}

Clang, linux.

Uninitialized bytes in __interceptor_strcmp at offset 8 inside [0x7010000002f0, 9)
==5039==WARNING: MemorySanitizer: use-of-uninitialized-value
    #0 0x7fe8e59f8fea  (/usr/lib/x86_64-linux-gnu/libasound.so.2+0x2dfea)
    #1 0x7fe8e59f9e65  (/usr/lib/x86_64-linux-gnu/libasound.so.2+0x2ee65)
    #2 0x7fe8e59fa3fe  (/usr/lib/x86_64-linux-gnu/libasound.so.2+0x2f3fe)
    #3 0x7fe8e59fd77e in snd_config_update_r (/usr/lib/x86_64-linux-gnu/libasound.so.2+0x3277e)
    #4 0x7fe8e59fde0d in snd_config_update_ref (/usr/lib/x86_64-linux-gnu/libasound.so.2+0x32e0d)
    #5 0x7fe8e5a088b9 in snd_ctl_open (/usr/lib/x86_64-linux-gnu/libasound.so.2+0x3d8b9)
    #6 0x7fe8e6016737  (/usr/lib/x86_64-linux-gnu/libportaudio.so.2+0x11737)
    #7 0x7fe8e601a33c in PaAlsa_Initialize (/usr/lib/x86_64-linux-gnu/libportaudio.so.2+0x1533c)
    #8 0x7fe8e600d10f in Pa_Initialize (/usr/lib/x86_64-linux-gnu/libportaudio.so.2+0x810f)
    #9 0x4a10f6 in test() /mnt/ssd-b/MyApps/inittest/inittest.cpp:7:2
    #10 0x4a1108 in s__s10_fn() /mnt/ssd-b/MyApps/inittest/inittest.cpp:11:2
    #11 0x4a1259 in Upp::Callinit::Callinit(void (*)(), char const*, int) /home/borntactical/upp.src/uppsrc/Core/Defs.h:86:83
    #12 0x422914 in __cxx_global_var_init /mnt/ssd-b/MyApps/inittest/inittest.cpp:10:1
    #13 0x422928 in _GLOBAL__sub_I_inittest.cpp /mnt/ssd-b/MyApps/inittest/inittest.cpp
    #14 0x90de0c in __libc_csu_init (/home/borntactical/out/MyApps/CLANGsanitize.Debug.Debug_Full.Shared.Usemalloc/inittest+0x90de0c)
    #15 0x7fe8e5aed03f in __libc_start_main /build/glibc-eX1tMB/glibc-2.31/csu/../csu/libc-start.c:264:6
    #16 0x42601d in _start (/home/borntactical/out/MyApps/CLANGsanitize.Debug.Debug_Full.Shared.Usemalloc/inittest+0x42601d)

SUMMARY: MemorySanitizer: use-of-uninitialized-value (/usr/lib/x86_64-linux-gnu/libasound.so.2+0x2dfea) 
Exiting
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I brought it up because it makes me wonder if an INITBLOCK is causing that complaint too