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Re: vim 7.1.135 (Fedora Core 8) core dumps ... frequently

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  • Bram Moolenaar
    Who are you? ... It s a pity that we don t have a reproducable example. It never happens to me, so I have no clue what to look for. There was one more patch
    Message 1 of 3 , Jan 28, 2008
      Who are you?

      > There is a serious problem with the vim (vim-minimal and proably vim-
      > enhanced too) distributed in Fedora Core 8 (7.1.135). It core dumps
      > in new code relating to "free headers to keep the size right". It is
      > trying to free already freed or invalid memory.
      >
      > It seems to be a pity that pointers are not always set to NULL when
      > memory is freed. That would certainly help to track and control this
      > sort of problem.

      It's a pity that we don't have a reproducable example. It never happens
      to me, so I have no clue what to look for.

      There was one more patch in the undo code: 7.1.155. You could try
      building with that included and find out if it helps.

      > Here is the stack trace:
      >
      > #0 0x0012d402 in __kernel_vsyscall ()
      > #1 0x0017fac6 in kill () from /lib/libc.so.6
      > #2 0x080a0987 in may_core_dump () at os_unix.c:2949
      > #3 0x080a0e16 in mch_exit (r=1) at os_unix.c:2914
      > #4 0x08080fb8 in preserve_exit () at misc1.c:8349
      > #5 <signal handler called>
      > #6 u_freeheader (buf=0x84d2b20, uhp=0x84db128, uhpp=0xbfba22f8) at
      > undo.c:1653
      > #7 0x080bf18a in u_savecommon (top=1, bot=3, newbot=0) at undo.c:425
      > #8 0x080bf5b0 in u_save_cursor () at undo.c:218
      > #9 0x0804ea9c in stop_arrow () at edit.c:6232
      > #10 0x08051456 in insert_special (c=35, allow_modmask=0, ctrlv=0)
      > at edit.c:5367
      > #11 0x080520fd in edit (cmdchar=105, startln=0, count=1) at edit.c:
      > 1381
      > #12 0x0808f6dd in invoke_edit (cap=0xbfba2408, repl=0, cmd=105,
      > startln=0)
      > at normal.c:8737
      > #13 0x08093b24 in normal_cmd (oap=0xbfba2460, toplevel=1) at normal.c:
      > 1141
      > #14 0x08071b08 in main_loop (cmdwin=0, noexmode=0) at main.c:1181
      > #15 0x08072f0c in main (argc=0, argv=0x23) at main.c:940
      >
      > Pity this version wasn't properly tested before FC8 acquired it.

      It was tested by many people. There must be something specific that
      you do that triggers the problem. Or something strange about how the
      Fedora Vim was built.

      --
      DENNIS: Look, strange women lying on their backs in ponds handing out
      swords ... that's no basis for a system of government. Supreme
      executive power derives from a mandate from the masses, not from some
      farcical aquatic ceremony.
      "Monty Python and the Holy Grail" PYTHON (MONTY) PICTURES LTD

      /// Bram Moolenaar -- Bram@... -- http://www.Moolenaar.net \\\
      /// sponsor Vim, vote for features -- http://www.Vim.org/sponsor/ \\\
      \\\ download, build and distribute -- http://www.A-A-P.org ///
      \\\ help me help AIDS victims -- http://ICCF-Holland.org ///

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