Issue with sobel1 example

[jabcross]

On following the README for the Sobel1 application, I hit the following error:

$ build/bin/hoclc -dif examples/working/apps/sobel1/main.hcl
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This is the HoCL compiler, version 1.2.2
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Parsing file ./build/lib/hocl/stdlib.hcl
Parsing file examples/working/apps/sobel1/main.hcl
Internal error: Failure("DIF backend cannot retrieve parameter value").

The generated DIF file is as follows:

  topology {
    nodes = n16, n17, n18, n19, n20, n21;
    edges = e6(n18,n21), e7(n16,n21), e8(n17,n21), e9(n20,n21), e10(n19,n21), e11(n19,n21), e3(n16,n20), e4(n17,n20), e5(n19,n20), e1(n16,n19), e2(n17,n19);
    }

  actortype Sobel {
    input inp;
    output outp;
    param width, height;
    }

  actortype DisplayYUV {
    input y, u, v;
    output ;
    param id, width, height;
    }

  actortype ReadYUV {
    input ;
    output y, u, v;
    param width, height;
    }

  actor n16 {
    type: width;
    interface o->e1, o->e3, o->e7;
    }

  actor n17 {
    type: height;
    interface o->e2, o->e4, o->e8;
    }

  actor n18 {
    type: index;
    interface o->e6;
    }

  actor n19 {
    type: ReadYUV;

Note that it stops before closing actor n19. Any ideas on where I should look to solve this?

[jserot]

Fixed in the current source tree. This may have to be adjusted according to the exact semantics of parameters in the latest DIF specification.