Created attachment 50901 [details] Code sample to reproduce the issue The provided sample crashes somewhere after exiting from main with the following backtrace (this is the best I could get): Thread 1 "a.out" received signal SIGABRT, Aborted. __restore_sigs (set=set@entry=0x7ffe4a7eac00) at ./arch/x86_64/syscall_arch.h:40 40 ./arch/x86_64/syscall_arch.h: No such file or directory. (gdb) bt #0 __restore_sigs (set=set@entry=0x7ffe4a7eac00) at ./arch/x86_64/syscall_arch.h:40 #1 0x00007f9b8c44750d in raise (sig=sig@entry=6) at src/signal/raise.c:11 #2 0x00007f9b8c41df25 in abort () at src/exit/abort.c:11 #3 0x00007f9b8c22ab53 in __deregister_frame_info_bases () from /usr/lib/libgcc_s.so.1 #4 0x00007f9b8c3d9c5e in __do_global_dtors_aux () from /usr/lib/libpaho-mqtt3cs.so.1 #5 0x000055c817f69294 in test(void*) () #6 0x00007f9b8c497880 in ?? () from /lib/ld-musl-x86_64.so.1 #7 0x00007f9b8c497b48 in builtin_tls () from /lib/ld-musl-x86_64.so.1 #8 0x00007f9b8c3f5d97 in ?? () from /usr/lib/libpaho-mqtt3cs.so.1 #9 0x0000000000000000 in ?? () I'm not sure the problem is isolated to the libpaho library, but this is the only one I could reproduce this behaviour with (related libpaho issue report: https://github.com/eclipse/paho.mqtt.c/issues/1110). I've been testing with the latest libpaho v1.3.9 (https://github.com/eclipse/paho.mqtt.c/releases/tag/v1.3.9), it needs to be compiled and installed with: cmake -DPAHO_WITH_SSL=TRUE -DCMAKE_BUILD_TYPE=Debug -DCMAKE_INSTALL_PREFIX:PATH=/usr -DCMAKE_INSTALL_LIBDIR=lib . make install Both commenting out the std::thread and replacing it with pthread calls make this issue go away. OS: Alpine Linux v3.13 Compiler: gcc (Alpine 10.2.1_pre1) Musl version: musl-1.2.2
Dup of bug 91737. *** This bug has been marked as a duplicate of bug 91737 ***
Or maybe not.
Or maybe it was caused by PR 91737.
PR 91737 seems similar enough to be related I've narrowed it down to the -Wl,-init functionality, if you comment out this lines it exits cleanly. https://github.com/eclipse/paho.mqtt.c/blob/master/src/CMakeLists.txt#L220 Interestingly enough if you edit the function https://github.com/eclipse/paho.mqtt.c/blob/master/src/MQTTClient.c#L119 to do absolutely nothing it still aborts, so it seems it's something with the init functionality itself, not this specific function