68683Re: Problem with --remote-expr and error checking
- Mar 13, 2013Christian Brabandt wrote:
> Hi Андрей!Hmm, that looks tricky. Maybe it works now, but if emsg_off is set in
> On Sa, 09 Mär 2013, Андрей Радев wrote:
> > While trying to evaluate commands on a remote server and get their
> > output, I've ran into a problem with error checking -- it seems like
> > with remote-expr there's no error-checking at all.
> > The simplest example I can think of is this (gist:
> > https://gist.github.com/AndrewRadev/5123706):
> > function! Test()
> > try
> > exe "frobble"
> > return 1
> > catch
> > return 2
> > endtry
> > endfunction
> > If I open a Vim with `vim --servername FOO` and :source this file,
> > executing `:echo Test()` results in 2, since there is no "frobble"
> > command. However, if I then try `vim --servername FOO --remote-expr
> > 'Test()'`, I get 1. I tried avoiding try/catch and using `v:errmsg`
> > instead, but that variable is also not set to the last error if the
> > function is invoked with `--remote-expr`.
> This happens, because error handling is explicitly disabled at
> eval_client_expr_to_string() in main.c
> I think, we can at least enable exception handling by this
some other situation it may unexpectedly still throw exceptions.
Let's try something else: set emsg_silent instead of emsg_off. I'll
send out a patch with that solution. Please try it out.
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