Re: [Libguestfs] nbdkit build failure (was: Re: jplesnik's nbdkit-1.35.5-4.fc39 failed to build)

It's a crash in Perl code, although called from the nbdkit perl plugin (C bindings). Still debugging this ... Core was generated by `/home/rjones/d/nbdkit/server/nbdkit -U /tmp/nbdkittPN34a/sock -P /tmp/nbdkittPN'. Program terminated with signal SIGSEGV, Segmentation fault. warning: Section `.reg-xstate/150177' in core file too small. #0 Perl_my_snprintf (buffer=0x7f3a1e5fc630 "p\310_\036:\177", len=32, format=0x7f3a1ef7e322 "_<(eval %lu)") at /usr/src/debug/perl-5.38.0-499.fc39.x86_64/util.c:5248 Downloading source file /usr/src/debug/perl-5.38.0-499.fc39.x86_64/util.c 5248 WITH_LC_NUMERIC_SET_TO_NEEDED( [Current thread is 1 (Thread 0x7f3a1e5fd6c0 (LWP 150177))] (gdb) bt #0 Perl_my_snprintf (buffer=0x7f3a1e5fc630 "p\310_\036:\177", len=32, format=0x7f3a1ef7e322 "_<(eval %lu)") at /usr/src/debug/perl-5.38.0-499.fc39.x86_64/util.c:5248 #1 0x00007f3a1ed8545f in Perl_pp_entereval (my_perl=0xcb39c90) at /usr/src/debug/perl-5.38.0-499.fc39.x86_64/pp_ctl.c:5107 #2 0x00007f3a1ed2d5e8 in Perl_runops_standard (my_perl=0xcb39c90) at /usr/src/debug/perl-5.38.0-499.fc39.x86_64/run.c:41 #3 0x00007f3a1ec73ddc in Perl_eval_sv (my_perl=my_perl@entry=0xcb39c90, sv=sv@entry=0xcb3d2b8, flags=flags@entry=2) at /usr/src/debug/perl-5.38.0-499.fc39.x86_64/perl.c:3269 #4 0x00007f3a1ec740e0 in Perl_eval_pv (my_perl=0xcb39c90, p=<optimized out>, croak_on_error=croak_on_error@entry=0) at /usr/src/debug/perl-5.38.0-499.fc39.x86_64/perl.c:3359 #5 0x00007f3a1fc9e6ca in callback_defined ( perl_func_name=perl_func_name@entry=0x7f3a1fca21af "can_write") at /home/rjones/d/nbdkit/plugins/perl/perl.c:102 #6 0x00007f3a1fc9f28c in perl_boolean (handle=0xcb7a350, callback_name=0x7f3a1fca21af "can_write", fn_name=0x7f3a1fca21b3 "write") at /home/rjones/d/nbdkit/plugins/perl/perl.c:430 #7 0x000000000040e290 in plugin_can_write (c=<optimized out>) at plugins.c:488 #8 0x00000000004078fe in backend_can_write (c=0x7f3a18000fb0) at backend.c:462 #9 0x0000000000410ea9 in protocol_common_open ( exportsize=exportsize@entry=0x7f3a1e5fca00, flags=flags@entry=0x7f3a18000e84, exportname=exportname@entry=0x7f3a18000f90 "") at protocol-handshake.c:103 #10 0x00000000004112ab in finish_newstyle_options ( exportsize=exportsize@entry=0x7f3a1e5fca00, exportname_in=<optimized out>, exportnamelen=exportnamelen@entry=0) at protocol-handshake-newstyle.c:319 #11 0x00000000004125e1 in negotiate_handshake_newstyle_options () at protocol-handshake-newstyle.c:619 #12 protocol_handshake_newstyle () at protocol-handshake-newstyle.c:985 #13 0x0000000000410e15 in protocol_handshake () at protocol-handshake.c:55 #14 0x000000000040a474 in handle_single_connection (sockin=6, sockout=<optimized out>) at connections.c:180 #15 0x0000000000414baf in start_thread (datav=0xcb2c4f0) at sockets.c:377 #16 0x00007f3a1f68db37 in start_thread (arg=<optimized out>) at pthread_create.c:444 #17 0x00007f3a1f714bec in clone3 () at ../sysdeps/unix/sysv/linux/x86_64/clone3.S:78 Rich. -- Richard Jones, Virtualization Group, Red Hat http://people.redhat.com/~rjones Read my programming and virtualization blog: http://rwmj.wordpress.com nbdkit - Flexible, fast NBD server with plugins https://gitlab.com/nbdkit/nbdkit