$ uname -v FreeBSD 14.0-CURRENT #2 main-888ae5725: Fri Feb 26 14:32:59 -05 2021 $ /usr/bin/lldb -v lldb version 11.0.1 (git@github.com:llvm/llvm-project.git revision llvmorg-11.0.1-0-g43ff75f2c3fe) clang revision llvmorg-11.0.1-0-g43ff75f2c3fe llvm revision llvmorg-11.0.1-0-g43ff75f2c3fe $ cc -v FreeBSD clang version 11.0.1 (git@github.com:llvm/llvm-project.git llvmorg-11.0.1-0-g43ff75f2c3fe) Target: x86_64-unknown-freebsd14.0 Thread model: posix InstalledDir: /usr/bin $ cat <<EOD > testcase.c #include <signal.h> int main(void) { raise(SIGABRT); } EOD $ cc -g testcase.c $ ./a.out Abort trap (core dumped) $ /usr/bin/lldb a.out -c a.out.core (lldb) target create "a.out" --core "a.out.core" Core file '/home/dg/tmp/abort/a.out.core' (x86_64) was loaded. (lldb) bt Program aborted due to an unhandled Error: Error value was Success. (Note: Success values must still be checked prior to being destroyed). PLEASE submit a bug report to https://bugs.freebsd.org/submit/ and include the crash backtrace. Stack dump: 0. Program arguments: /usr/bin/lldb a.out -c a.out.core 1. HandleCommand(command = "bt") #0 0x0000000003b35a0e PrintStackTrace /usr/src/contrib/llvm-project/llvm/lib/Support/Unix/Signals.inc:564:13 #1 0x0000000003b33ea7 RunSignalHandlers /usr/src/contrib/llvm-project/llvm/lib/Support/Signals.cpp:69:18 #2 0x0000000003b35f80 SignalHandler /usr/src/contrib/llvm-project/llvm/lib/Support/Unix/Signals.inc:0:3 #3 0x0000000804cdde52 handle_signal /usr/src/lib/libthr/thread/thr_sig.c:0:3 Abort trap (core dumped)
Interesting, this works just fine for me on 14.0-CURRENT #0 main-n245108-1bf86687c2eb (as of 2021-02-26): % lldb a.out -c a.out.core (lldb) target create "a.out" --core "a.out.core" Core file '/share/dim/bugs/bug253881/a.out.core' (x86_64) was loaded. (lldb) bt This version of LLDB has no plugin for the mipsassem language. Inspection of frame variables will be limited. * thread #1, name = 'a.out', stop reason = signal SIGABRT * frame #0: 0x000000080038437a libc.so.7`__sys_thr_kill at thr_kill.S:4 frame #1: 0x00000008002f90f4 libc.so.7`__raise(s=6) at raise.c:52:10 frame #2: 0x0000000000201892 a.out`main at testcase.c:6:5 frame #3: 0x0000000000201690 a.out`_start(ap=<unavailable>, cleanup=<unavailable>) at crt1_c.c:75:7 Is it possible for you to debug the lldb.core file with, say, gdb? :)