Though perhaps this might help: the end of an strace, clipped after a long run of futex's.
... futex(0x7f05d5b46f38, FUTEX_WAKE_PRIVATE, 2147483647) = 0 openat(AT_FDCWD, "/home/jeff/.config/gtk-2.0/gtkfilechooser.ini", O_RDONLY) = 9 fstat(9, {st_mode=S_IFREG|0664, st_size=214, ...}) = 0 read(9, "[Filechooser Settings]\nLocationM"..., 4096) = 214 read(9, "", 4096) = 0 close(9) = 0 munmap(0x7f05bad1f000, 1957888) = 0 munmap(0x7f05b933e000, 1957888) = 0 futex(0x7f05d5b46f38, FUTEX_WAKE_PRIVATE, 2147483647) = 0 ioctl(2, TCGETS, {B38400 opost isig icanon echo ...}) = 0 getpid() = 623 write(2, "\n(ufraw:623): GLib-GObject-\33[1;3"..., 130 (ufraw:623): GLib-GObject-CRITICAL **: 05:48:02.397: g_object_unref: assertion 'G_IS_OBJECT (object)' failed ) = 130 ioctl(2, TCGETS, {B38400 opost isig icanon echo ...}) = 0 getpid() = 623 write(2, "\n(ufraw:623): GLib-GObject-\33[1;3"..., 130 (ufraw:623): GLib-GObject-CRITICAL **: 05:48:02.397: g_object_unref: assertion 'G_IS_OBJECT (object)' failed ) = 130 futex(0x7f05d5b46f38, FUTEX_WAKE_PRIVATE, 2147483647) = 0 munmap(0x7f058c3e0000, 130154496) = 0 munmap(0x7f05d6118000, 323584) = 0 munmap(0x7f05847c0000, 130154496) = 0 munmap(0x7f05783e0000, 130154496) = 0 munmap(0x7f05bab42000, 1953792) = 0 --- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_MAPERR, si_addr=0x38} --- +++ killed by SIGSEGV (core dumped) +++ Segmentation fault (core dumped) -- You received this bug notification because you are a member of Ubuntu Studio Bugs, which is subscribed to ufraw in Ubuntu. Matching subscriptions: Ubuntu Studio Bugs https://bugs.launchpad.net/bugs/1784785 Title: ufraw segfaults at end of file write Status in ufraw package in Ubuntu: New Bug description: When writing its output file, ufraw segfaults. This happens both for jpg and png (and then I stopped testing different file formats). Most of the time the file appears to be complete. Sometimes it is signaled as corrupt by a file viewer. I'm not sure how to usefully debug further short of installing full source code, compiling with -g, etc. ProblemType: Bug DistroRelease: Ubuntu 18.04 Package: ufraw 0.22-3 ProcVersionSignature: Ubuntu 4.15.0-23.25-generic 4.15.18 Uname: Linux 4.15.0-23-generic x86_64 ApportVersion: 2.20.9-0ubuntu7.2 Architecture: amd64 CurrentDesktop: i3 Date: Wed Aug 1 07:26:47 2018 EcryptfsInUse: Yes InstallationDate: Installed on 2015-10-23 (1012 days ago) InstallationMedia: Ubuntu 15.04 "Vivid Vervet" - Release amd64 (20150422) SourcePackage: ufraw UpgradeStatus: Upgraded to bionic on 2018-06-14 (47 days ago) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/ufraw/+bug/1784785/+subscriptions -- Mailing list: https://launchpad.net/~ubuntustudio-bugs Post to : ubuntustudio-bugs@lists.launchpad.net Unsubscribe : https://launchpad.net/~ubuntustudio-bugs More help : https://help.launchpad.net/ListHelp