Hi list,
I'm writing a Vim plug-in that's sort of like :mksession on steroids.
When I realized how difficult it would be to reproduce any given split
window lay-out in Vim script commands I decided to take the easy way out
and use :mksession since it does this flawlessly already! But then I
found a problem in the session script generated by :mksession. This is
using the latest Vim 7.2 including patches 1-444.
The problem is that the session script includes an :args command that
sets the argument list to one filename, which is fine, but then later
the session script also executes the command "2argu" several times,
which causes Vim to show the error "E163: There is only one file to
edit" once for each occurrence of "2argu". I searched the archives for
:mksession + E163 and found one previous thread about the same problem
at http://old.nabble.com/session-problem-td27813363.html#a27814733 but
that thread doesn't end with a solution.
I think I've found the cause to be a typo in ex_docmd.c where the
expression wp->w_arg_idx <= WARGCOUNT(wp) should have been wp->w_arg_idx
< WARGCOUNT(wp) (lower than instead of lower than or equal). After
applying the attached patch and recompiling Vim I can no longer
reproduce the problem described above, however I must admit that I
failed to reliably reproduce the problem in the first place, it would
just occur once in a while when I was testing my session plug-in.
- Peter Odding
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diff -uNr vim-7.2/src/ex_docmd.c.old vim-7.2/src/ex_docmd.c
--- vim-7.2/src/ex_docmd.c.old 2010-06-25 18:49:45.583233458 +0200
+++ vim-7.2/src/ex_docmd.c 2010-06-25 18:49:48.082744150 +0200
@@ -10398,7 +10398,7 @@
/* Only when part of a session: restore the argument index. Some
* arguments may have been deleted, check if the index is valid. */
- if (wp->w_arg_idx != current_arg_idx && wp->w_arg_idx <= WARGCOUNT(wp)
+ if (wp->w_arg_idx != current_arg_idx && wp->w_arg_idx < WARGCOUNT(wp)
&& flagp == &ssop_flags)
{
if (fprintf(fd, "%ldargu", (long)wp->w_arg_idx + 1) < 0
