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(Fcombine_after_change_execute): Return nil if

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combine_after_change_buffer has been invalidated.
This commit is contained in:
Chong Yidong 2007-02-28 22:21:25 +00:00
parent f79b31dba0
commit c47a9ed17a
1 changed files with 11 additions and 0 deletions
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11
src/insdel.c
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@ -2351,6 +2351,17 @@ DEFUN ("combine-after-change-execute", Fcombine_after_change_execute,
if (NILP (combine_after_change_list))
return Qnil;
/* It is rare for combine_after_change_buffer to be invalid, but
possible. It can happen when combine-after-change-calls is
non-nil, and insertion calls a file handler (e.g. through
lock_file) which scribbles into a temp file -- cyd */
if (!BUFFERP (combine_after_change_buffer)
|| NILP (XBUFFER (combine_after_change_buffer)->name))
{
combine_after_change_list = Qnil;
return Qnil;
}
record_unwind_protect (Fset_buffer, Fcurrent_buffer ());
Fset_buffer (combine_after_change_buffer);