w3m and vim segfaults (gpm related?)

[Derek Poon]

I'm getting segfaults with w3m and vim when running them in the Linux text
console.  As I'm speculating that the two crashes might be interrelated,
I'm going to describe both in the same e-mail.

I'm running on recent FC devel packages:
    kernel-2.6.5-1.326
    gpm-1.20.1-46
    w3m-0.5-2
    vim-common-6.2.457-1
    vim-enhanced-6.2.457-1

In case it matters, here's my /etc/sysconfig/mouse:
    FULLNAME="Generic - Wheel Mouse (USB)"
    MOUSETYPE="imps2"
    XEMU3="yes"
    XMOUSETYPE="IMPS/2"
    DEVICE=/dev/input/mice

========================================================================
ISSUE #1:

When running in the Linux text console, w3m crashes immediately after
rendering any webpage.
  $ echo $TERM
  linux

  $ ldd /usr/bin/w3m
        [...]
        libgpm.so.1 => /usr/lib/libgpm.so.1 (0x00521000)
        libtermcap.so.2 => /lib/libtermcap.so.2 (0x0089f000)
        libc.so.6 => /lib/tls/libc.so.6 (0x0054f000)
        /lib/ld-linux.so.2 => /lib/ld-linux.so.2 (0x00537000)

  $ rm -rf ~/.w3m

  $ /usr/bin/w3m http://www.google.com/
  Program received signal SIGSEGV, Segmentation fault.
  0x00524af0 in Gpm_Wgetch (win=0x0) at lib/libcurses.c:80
  80              return GET(win);
  (gdb) bt
  #0  0x00524af0 in Gpm_Wgetch (win=0x0) at lib/libcurses.c:80
  #1  0x08091a2c in do_getch () at terms.c:1852
  #2  0x0804c797 in main (argc=2, argv=0xfeee8254, envp=0xfeee8260)
      at main.c:1094
  #3  [...]

For your information, GET(0) is just a macro in gpm's libcurses.c that
evaluates to getch().  Why should something as simple as getch()
segfault?

It works fine when w3m is running under gnome-terminal with TERM=xterm,
but crashes as described above if I run it in gnome-terminal and force
TERM=linux.

If the gpm daemon is not running, the /dev/gpmctl socket does not exist,
and the screen is littered with the following diagnostic messages.  But
w3m crashes in exactly the same way whether or not gpm is running.
  *** info [lib/liblow.c(326)]:
  /dev/gpmctl: No such file or directory
  *** err [lib/liblow.c(333)]:
  /dev/gpmctl: No such file or directory
  *** err [lib/liblow.c(377)]:
  Oh, oh, it's an error! possibly I die!


It would be nice to get this resolved, since the whole point of w3m is
to quickly Google some stuff without firing up the X server =)

========================================================================
ISSUE #2:

Here's a crash in vim that is also somehow mouse related.

  $ echo $TERM
  linux

  $ ldd /usr/bin/vim
	[...]
	libgpm.so.1 => /usr/lib/libgpm.so.1 (0x00521000)
	[...]

  $ /usr/bin/vim

Then, if you don't already have such a command in your ~/.vimrc, type
    :set mouse=n

and then type any colon or slash command, such as
    :  or  :w  or  :q

and watch vim explode--
    Vim: Caught deadly signal SEGV

    Vim: Finished.
    Segmentation fault


It's certainly challenging trying to use vim without ever hitting the
colon or slash keys.  Before I figured out the workaround of removing "set
mouse" from my .vimrc, I kept losing my work due to vi twitches like :w =)

========================================================================

Any ideas?

Derek