[Swift-user] Error: Attempted to close nonexistent channel buffers

[Mihael Hategan]

Hmm. Do you have a simple example that triggers it?

On Thu, 2007-09-13 at 15:29 -0500, Veronika Nefedova wrote:
> actually, this error shows up when there is a mismatch between input/ 
> output lists in declaration and in the function call. I've seen this  
> error today - the number of parameters didn't match in declaration  
> and actual function call. Once it was fixed, the error went away.
> 
> Nika
> 
> On Sep 13, 2007, at 3:22 PM, Mihael Hategan wrote:
> 
> > What version are you using?
> > That error shows a bug in the Swift implementation, and it should have
> > been fixed, at least in SVN.
> >
> > Mihael
> >
> > On Thu, 2007-09-13 at 14:36 -0400, Allen, M. David wrote:
> >> Hello,
> >>
> >> I'm just getting started with Swift, and trying to program a fairly
> >> trivial sample to get started.
> >>
> >> My swiftscript fails with the message:
> >> "Execution failed:
> >>         grep started
> >> Attempted to close nonexistent channel buffers"
> >>
> >> Can anyone point me to the documentation that describes such errors?
> >> This is referring to a spot in my code that is executing a very
> >> vanilla grep operation.  My input file is just 14 lines long, and  
> >> this
> >> error consistently happens towards the end of the overall workflow
> >> execution.
> >>
> >> The code:
> >>
> >> type blog {
> >>     string name;
> >>     string feedURL;
> >> }
> >>
> >> type file { }
> >>
> >> (file headlines) getHeadlines(blog b) {
> >>         app {
> >>                 feeder @b.feedURL stdout=@filename(headlines);
> >>         }
> >> }
> >>
> >> (file results[]) processBlogs(blog blogs[]) {
> >>
> >>         foreach blog el, index in blogs {
> >>                 results[index] = getHeadlines( el ) ;
> >>         }
> >> }
> >>
> >> (string matches) findSingleMatch(file input, string searchTerm) {
> >>         app {
> >>                 grep "-i" searchTerm @filename(input)  
> >> stdout=@matches;
> >>         }
> >> }
> >>
> >> (file matches) findMatches(file inputs[], string searchTerm) {
> >>         string final;
> >>
> >>         foreach input, index in inputs {
> >>                 string intermed = findSingleMatch(input, searchTerm);
> >>                 final = strcat(final, intermed);
> >>         }
> >>
> >>         matches = dumpString(final);
> >> }
> >>
> >> (int retVal) debug(string m) {
> >>         app {
> >>                 echo m ;
> >>         }
> >> }
> >>
> >> (file t) dumpString(string m) {
> >>     app {
> >>         echo m stdout=@filename(t);
> >>     }
> >> }
> >>
> >> blog blogs[]  <csv_mapper; file="blogs.csv", delim=",",
> >> header="true">;
> >> file output[] <simple_mapper;
> >> prefix="output/blogHeadlines",suffix=".txt">;
> >> file final <simple_mapper; prefix="output/result", suffix=".txt">;
> >>
> >> output = processBlogs(blogs);
> >> final = findMatches(output, "ARG 0");
> >>
> >> Any help would be greatly appreciated.
> >> --
> >> M. David Allen
> >> _______________________________________________
> >> Swift-user mailing list
> >> Swift-user at ci.uchicago.edu
> >> http://mail.ci.uchicago.edu/mailman/listinfo/swift-user
> >
> > _______________________________________________
> > Swift-user mailing list
> > Swift-user at ci.uchicago.edu
> > http://mail.ci.uchicago.edu/mailman/listinfo/swift-user
> >
>