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Date:	Sun, 18 Apr 2010 19:42:54 +0100
From:	Dave Korn <dave DOT korn DOT cygwin AT googlemail DOT com>
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Subject:	Re: bash/readline spinout in vi command mode
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On 18/04/2010 16:48, Andy Koppe wrote:

> Spinning on a 32-bit XP here as well, whereas it didn't on a 64-bit Win7.

  The stack looks like this when it spins:

> (gdb) bt
> #0  0x61109827 in strlen () from /usr/bin/cygwin1.dll
> #1  0x6afdbbb5 in rl_find_next_mbchar () from /usr/bin/cygreadline7.dll
> #2  0x6afd56b4 in rl_char_search_internal () from /usr/bin/cygreadline7.dll
> #3  0x6afc3474 in rl_vi_char_search () from /usr/bin/cygreadline7.dll
> #4  0x6afc16ba in rl_dispatch_subseq () from /usr/bin/cygreadline7.dll
> #5  0x6afc1a75 in rl_dispatch () from /usr/bin/cygreadline7.dll
> #6  0x6afd7c05 in rl_arg_dispatch () from /usr/bin/cygreadline7.dll
> #7  0x6afd7d79 in rl_arg_callback () from /usr/bin/cygreadline7.dll
> #8  0x6afc16ba in rl_dispatch_subseq () from /usr/bin/cygreadline7.dll
> #9  0x6afc1a75 in rl_dispatch () from /usr/bin/cygreadline7.dll
> #10 0x6afc1e19 in readline_internal_char () from /usr/bin/cygreadline7.dll
> #11 0x6afc2205 in readline () from /usr/bin/cygreadline7.dll

  If you continue it, both strlen and rl_find_next_mbchar complete and return
to their callers, but rl_char_search_internal never returns; it loops forever
calling those two functions.

  Someone will need to build readline from source to see what's happening, but
I'd guess it's a real bug.

    cheers,
      DaveK


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