The crash can also be reproduced even without an real device, replace /dev/sdc with a normal file name, such as './block', can also reproduce it.
Here is the crash output from parted: WARNING: you are attempting to use parted to operate on (mkpartfs) a file system. parted's file system manipulation code is not as robust as what you'll find in dedicated, file-system-specific packages like e2fsprogs. We recommend you use parted only to manipulate partition tables, whenever possible. Support for performing most operations on most types of file systems will be removed in an upcoming release. Backtrace has 9 calls on stack: 9: /lib/x86_64-linux-gnu/libparted.so.0(ped_assert+0x31) [0x7f9823b0b4b1] 8: /lib/x86_64-linux-gnu/libparted.so.0(+0x25cc3) [0x7f9823b21cc3] 7: /lib/x86_64-linux-gnu/libparted.so.0(fat_create+0x189) [0x7f9823b24f49] 6: /lib/x86_64-linux-gnu/libparted.so.0(ped_file_system_create+0x51) [0x7f9823b0cef1] 5: parted() [0x409cbc] 4: parted(non_interactive_mode+0x8f) [0x40dc5f] 3: parted(main+0x146d) [0x4064ed] 2: /lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0xf5) [0x7f98232e8ec5] 1: parted() [0x406617] You found a bug in GNU Parted! Here's what you have to do: Don't panic! The bug has most likely not affected any of your data. Help us to fix this bug by doing the following: Check whether the bug has already been fixed by checking the last version of GNU Parted that you can find at: http://ftp.gnu.org/gnu/parted/ Please check this version prior to bug reporting. If this has not been fixed yet or if you don't know how to check, please visit the GNU Parted website: http://www.gnu.org/software/parted for further information. Your report should contain the version of this release (2.3) along with the error message below, the output of parted DEVICE unit co print unit s print and the following history of commands you entered. Also include any additional information about your setup you consider important. Assertion (bs != NULL) at ../../../../libparted/fs/fat/bootsector.c:282 in function fat_boot_sector_set_boot_code() failed. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1302762 Title: gpartedbin crashed with SIGSEGV in _int_free() To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/parted/+bug/1302762/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs