Hi again, I was able to reproduce it on hydra.gnu.org with:
guix copy --to=hydra.gnunet.org /gnu/store/gi7r1v65zqhh8riqprq8nchfc9v9k156-guix-current which leads most of the time to SIGSEGV (I couldn’t get the SIGSEGV on my laptop): --8<---------------cut here---------------start------------->8--- Thread 1 received signal SIGSEGV, Segmentation fault. 0x00007f121ff61ac7 in deflate_fast () from /gnu/store/jwkcd7siv6fcyl0qsg607bg9c8ap0gqr-zlib-1.2.11/lib/libz.so.1 (gdb) bt #0 0x00007f121ff61ac7 in deflate_fast () from /gnu/store/jwkcd7siv6fcyl0qsg607bg9c8ap0gqr-zlib-1.2.11/lib/libz.so.1 #1 0x00007f121ff6378d in deflate () from /gnu/store/jwkcd7siv6fcyl0qsg607bg9c8ap0gqr-zlib-1.2.11/lib/libz.so.1 #2 0x00007f121e281451 in gzip_compress () from /gnu/store/vlc43y485v80sgq7iw60hzy4pw5r52d2-libssh-0.7.4/lib/libssh.so.4 #3 0x00007f121e281783 in compress_buffer () from /gnu/store/vlc43y485v80sgq7iw60hzy4pw5r52d2-libssh-0.7.4/lib/libssh.so.4 #4 0x00007f121e266ea7 in packet_send2 () from /gnu/store/vlc43y485v80sgq7iw60hzy4pw5r52d2-libssh-0.7.4/lib/libssh.so.4 #5 0x00007f121e257598 in channel_write_common () from /gnu/store/vlc43y485v80sgq7iw60hzy4pw5r52d2-libssh-0.7.4/lib/libssh.so.4 #6 0x00007f121e6c15ee in write_to_channel_port () from /gnu/store/ql5h9hxh5560d42xdirh0yxzrgii6i0m-guile-ssh-0.11.0/lib/libguile-ssh.so.11 #7 0x00007f122532472c in scm_i_write_bytes () from /gnu/store/5zx29y44nrqj0s8h3jlvlj82k8hj4dxs-guile-2.2.2/lib/libguile-2.2.so.1 #8 0x00007f122532bde4 in scm_put_bytevector () from /gnu/store/5zx29y44nrqj0s8h3jlvlj82k8hj4dxs-guile-2.2.2/lib/libguile-2.2.so.1 #9 0x00007f1225360c4d in vm_regular_engine () from /gnu/store/5zx29y44nrqj0s8h3jlvlj82k8hj4dxs-guile-2.2.2/lib/libguile-2.2.so.1 --8<---------------cut here---------------end--------------->8--- Unfortunately, when running under “valgrind --trace-children=yes”, it doesn’t segfault and Valgrind doesn’t report anything interesting (neither on hydra.gnu.org nor on my laptop). I built libssh and guile-ssh with -fsanitize=address on my laptop but that doesn’t report anything useful either. Suggestions welcome! Ludo’.
