https://gcc.gnu.org/bugzilla/show_bug.cgi?id=100851
Bug ID: 100851 Summary: Using std::thread on Alpine Linux/musl causes SIGABRT after main when unloading a shared library. Product: gcc Version: 10.2.1 Status: UNCONFIRMED Severity: normal Priority: P3 Component: libstdc++ Assignee: unassigned at gcc dot gnu.org Reporter: michaldrozd at protonmail dot ch Target Milestone: --- Created attachment 50901 --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=50901&action=edit 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