Hello,
Working on https://issues.guix.gnu.org/58733, I noticed that there is something wrong with the core dumps we are generating on Guix System. --8<---------------cut here---------------start------------->8--- mathieu@meije ~/tmp [env]$ cat test.c #include <stdio.h> int main() { int *t = NULL; return *t; } mathieu@meije ~/tmp [env]$ gcc test.c mathieu@meije ~/tmp [env]$ ulimit -c unlimited mathieu@meije ~/tmp [env]$ ulimit -a real-time non-blocking time (microseconds, -R) unlimited core file size (blocks, -c) unlimited mathieu@meije ~/tmp [env]$ echo "/tmp/my-core-%p" | sudo tee /proc/sys/kernel/core_pattern /tmp/my-core-%p mathieu@meije ~/tmp [env]$ ./a.out Segmentation fault (core dumped) mathieu@meije ~/tmp [env]$ gdb ./a.out /tmp/my-core-5622 ... BFD: warning: /tmp/my-core-5622 has a segment extending past end of file ... Failed to read a valid object file image from memory. Core was generated by `./a.out'. Program terminated with signal SIGSEGV, Segmentation fault. #0 0x0000000000401102 in main () (gdb) bt #0 0x0000000000401102 in main () Backtrace stopped: Cannot access memory at address 0x7fff14e14168 --8<---------------cut here---------------end--------------->8--- The "has a segment extending past end of file" warning appears to be problematic and the "bt" command does not work which makes core dump generation a bit useless. Thanks, Mathieu