I got this bug again using an installation of Kubuntu Feisty Herd-2 with recent updates. Again I attached to the kdesu process, and the backtrace looks as in my comment just before this one.
This time, I also remembered to attach to the corresponding kdesu_stub and create a stacktrace: (gdb) bt #0 0xb7fcd410 in ?? () #1 0xbfa3ee94 in ?? () #2 0x00000400 in ?? () #3 0xb7fca000 in ?? () #4 0xb7f3ce93 in __read_nocancel () from /lib/tls/i686/cmov/libc.so.6 #5 0xb7ede4d8 in _IO_file_read_internal () from /lib/tls/i686/cmov/libc.so.6 #6 0xb7edf8a0 in _IO_new_file_underflow () from /lib/tls/i686/cmov/libc.so.6 #7 0xb7edff9b in _IO_default_uflow_internal () from /lib/tls/i686/cmov/libc.so.6 #8 0xb7ee12fd in __uflow () from /lib/tls/i686/cmov/libc.so.6 #9 0xb7ed5096 in _IO_getline_info_internal () from /lib/tls/i686/cmov/libc.so.6 #10 0xb7ed4fe1 in _IO_getline_internal () from /lib/tls/i686/cmov/libc.so.6 #11 0xb7ed3f8a in fgets () from /lib/tls/i686/cmov/libc.so.6 #12 0x08048ebf in main () at /build/buildd/kdelibs-3.5.5a.dfsg.1/./kdesu/kdesu_stub.c:203 #13 0xb7e92ebc in __libc_start_main () from /lib/tls/i686/cmov/libc.so.6 #14 0x08048bd1 in _start () Some shallow further "analysis": (gdb) up #12 0x08048ebf in main () at /build/buildd/kdelibs-3.5.5a.dfsg.1/./kdesu/kdesu_stub.c:203 203 in /build/buildd/kdelibs-3.5.5a.dfsg.1/./kdesu/kdesu_stub.c (gdb) print i $4 = 0 It seems that not much at all happened during the communication. If somebody can give any hints as to how I could help track down this bug, please do tell me. -- kdesu will not start apps https://launchpad.net/bugs/50971 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
