Hi, Recently, I've noticed that Vinagre segfaults when I initiate a connection. To reproduce, try doing the following: 1) Install Vinagre. 2) Try to connect to a remote host. 3) Vinagre displays a black screen, and about 10-20 seconds later, it crashes. I've obtained a core dump, but it seems I can't get debug symbols from it. I'm using a custom version that adds a "debug" output, and my ~/.gdbinit is set up according to what Guix recommends in its manual ((guix) Installing Debugging Files). What do I need to do to get gdb to give me useful information? Example debugging session follows: --8<---------------cut here---------------start------------->8--- [0] marusich@garuda.local:~/debug-vinagre $ cat ~/.gdbinit # Tell GDB where to look for separate debugging files. set debug-file-directory ~/.guix-profile/lib/debug # Let GDB auto-load any files it needs. set auto-load safe-path / [0] marusich@garuda.local:~/debug-vinagre $ file core core: ELF 64-bit LSB core file x86-64, version 1 (SYSV), SVR4-style, from '/home/marusich/.guix-profile/bin/vinagre', real uid: 1000, effective uid: 1000, real gid: 998, effective gid: 998, execfn: '/gnu/store/7w9pimrkk7n1f9zxw9va6jkhmgyw8bbv-maru-vinagre-3.22.0/bin/.vinagre-real', platform: 'x86_64' [0] marusich@garuda.local:~/debug-vinagre $ tree ~/.guix-profile/lib/debug/ /home/marusich/.guix-profile/lib/debug/ └── gnu └── store ├── 7w9pimrkk7n1f9zxw9va6jkhmgyw8bbv-maru-vinagre-3.22.0 -> /gnu/store/j6nkca3pr1vhbd8bf25pphcwk66fb7nj-maru-vinagre-3.22.0-debug/lib/debug/gnu/store/7w9pimrkk7n1f9zxw9va6jkhmgyw8bbv-maru-vinagre-3.22.0 └── n6nvxlk2j8ysffjh3jphn1k5silnakh6-glibc-2.25 -> /gnu/store/z1y36la9q1xkc5i5vcxqm7d995nrngmn-gcc-toolchain-7.2.0/lib/debug/gnu/store/n6nvxlk2j8ysffjh3jphn1k5silnakh6-glibc-2.25 4 directories, 0 files [0] marusich@garuda.local:~/debug-vinagre $ grep -A99 ~/custom-guix-packages/ marusich.scm marusich.scm~ my-packages/ [0] marusich@garuda.local:~/debug-vinagre $ grep -A99 maru-vinagre ~/custom-guix-packages/marusich.scm (define-public maru-vinagre (package (inherit vinagre) (name "maru-vinagre") (outputs '("out" "debug")))) [0] marusich@garuda.local:~/debug-vinagre $ guix package --list-installed | grep maru-vinagre maru-vinagre 3.22.0 debug /gnu/store/j6nkca3pr1vhbd8bf25pphcwk66fb7nj-maru-vinagre-3.22.0-debug maru-vinagre 3.22.0 out /gnu/store/7w9pimrkk7n1f9zxw9va6jkhmgyw8bbv-maru-vinagre-3.22.0 [0] marusich@garuda.local:~/debug-vinagre $ gdb --quiet /gnu/store/7w9pimrkk7n1f9zxw9va6jkhmgyw8bbv-maru-vinagre-3.22.0/bin/.vinagre-real core Reading symbols from /gnu/store/7w9pimrkk7n1f9zxw9va6jkhmgyw8bbv-maru-vinagre-3.22.0/bin/.vinagre-real... warning: the debug information found in "/home/marusich/.guix-profile/lib/debug//gnu/store/7w9pimrkk7n1f9zxw9va6jkhmgyw8bbv-maru-vinagre-3.22.0/bin/.vinagre-real.debug" does not match "/gnu/store/7w9pimrkk7n1f9zxw9va6jkhmgyw8bbv-maru-vinagre-3.22.0/bin/.vinagre-real" (CRC mismatch). (no debugging symbols found)...done. [New LWP 28789] [New LWP 28790] [New LWP 28791] [New LWP 28792] [Thread debugging using libthread_db enabled] Using host libthread_db library "/gnu/store/3h31zsqxjjg52da5gp3qmhkh4x8klhah-glibc-2.25/lib/libthread_db.so.1". Core was generated by `/home/marusich/.guix-profile/bin/vinagre'. Program terminated with signal SIGSEGV, Segmentation fault. #0 0x00007f173c081707 in vnc_connection_coroutine () from /gnu/store/slxc1lf23wdzjamn6pfp2inrzy74dbwh-gtk-vnc-0.7.0/lib/libgvnc-1.0.so.0 [Current thread is 1 (Thread 0x7f1741e67500 (LWP 28789))] (gdb) l No symbol table is loaded. Use the "file" command. (gdb) where #0 0x00007f173c081707 in vnc_connection_coroutine () from /gnu/store/slxc1lf23wdzjamn6pfp2inrzy74dbwh-gtk-vnc-0.7.0/lib/libgvnc-1.0.so.0 #1 0x00007f173c08489f in coroutine_trampoline () from /gnu/store/slxc1lf23wdzjamn6pfp2inrzy74dbwh-gtk-vnc-0.7.0/lib/libgvnc-1.0.so.0 #2 0x00007f173ae6c990 in ?? () from /gnu/store/3h31zsqxjjg52da5gp3qmhkh4x8klhah-glibc-2.25/lib/libc.so.6 #3 0x000000000101ec08 in ?? () #4 0x0000000000000000 in ?? () (gdb) --8<---------------cut here---------------end--------------->8--- I'm pretty new to debugging C programs in gdb, so if I'm making any obvious mistakes, I'd really appreciate it if you'd let me know! Thank you, -- Chris