Don't know where shortcode fails in Nunjucks template

[antgel]

Operating system

Xubuntu 22.04

Eleventy

2.0.1

Describe the bug

I have a fairly standard setup using an image shortcode to generate responsive images.

  eleventyConfig.addShortcode("image", async function(src, alt, klass, sizes, loading) {
    let metadata = await Image(src, {
      widths: [500, 750, 1000, "auto"],  // aligned with Strapi size optimization
      formats: ["avif", "webp", "jpeg"],
      outputDir: "dist/img"
    });

    let imageAttributes = {
      class: klass,
      alt,
      sizes,
      loading: loading || "eager",
      decoding: "async",
    };

    // You bet we throw an error on a missing alt (alt="" works okay)
    return Image.generateHTML(metadata, imageAttributes);
  });

I use this several times in a template that consumes JavaScript data from Strapi, e.g.
{% image industrial.attributes.roadmapPhoto.data.attributes.url, "Roadmap photo", "img-fluid rounded-3", "(max-width: 500px) 100vw, (max-width: 750px) 100vw, (max-width: 1000px) 100vw" %}

However, if industrial.attributes.roadmapPhoto.data.attributes.url is undefined, we get an error as per below.

[11ty] File changed: src/industrials.njk
[11ty] Problem writing Eleventy templates: (more in DEBUG output)
[11ty] 1. Having trouble rendering njk template ./src/industrials.njk (via TemplateContentRenderError)
[11ty] 2. (./src/industrials.njk)
[11ty]   EleventyShortcodeError: Error with Nunjucks shortcode `image` (via Template render error)
[11ty] 3. `src` is a required argument to the eleventy-img utility (can be a String file path, String URL, or Buffer). (via Template render error)
[11ty] 
[11ty] Original error stack trace: Error: `src` is a required argument to the eleventy-img utility (can be a String file path, String URL, or Buffer).
[11ty]     at new Image (/home/antony/Sync/src/git/glenmore-frontend/node_modules/@11ty/eleventy-img/img.js:118:13)
[11ty]     at queueImage (/home/antony/Sync/src/git/glenmore-frontend/node_modules/@11ty/eleventy-img/img.js:622:13)
[11ty]     at Object.<anonymous> (/home/antony/Sync/src/git/glenmore-frontend/.eleventy.js:55:24)
[11ty]     at Object.<anonymous> (/home/antony/Sync/src/git/eleventy-antgel/src/BenchmarkGroup.js:32:26)
[11ty]     at ShortcodeFunction.run (/home/antony/Sync/src/git/eleventy-antgel/src/Engines/Nunjucks.js:200:14)
[11ty]     at eval (eval at _compile (/home/antony/Sync/src/git/eleventy-antgel/node_modules/nunjucks/src/environment.js:527:18), <anonymous>:232:33)
[11ty]     at iterCallback (/home/antony/Sync/src/git/eleventy-antgel/node_modules/nunjucks/src/runtime.js:236:11)
[11ty]     at next (/home/antony/Sync/src/git/eleventy-antgel/node_modules/nunjucks/src/lib.js:258:7)
[11ty]     at eval (eval at _compile (/home/antony/Sync/src/git/eleventy-antgel/node_modules/nunjucks/src/environment.js:527:18), <anonymous>:236:1)
[11ty]     at /home/antony/Sync/src/git/eleventy-antgel/src/Engines/Nunjucks.js:202:15
[11ty] Benchmark     54ms  32%   246× (Configuration) "slugify" Nunjucks Filter
[11ty] Copied 9 files / Wrote 0 files in 0.17 seconds (v2.0.1)

The problem is that 11ty doesn't tell me where in the template it failed, which is frustrating as this shortcode is used in tens of places in the template, so I have to start commenting them out to see what happened. Can this information be exposed?

Note that running with DEBUG doesn't add any more useful information.

Reproduction steps

No response

Expected behavior

No response

Reproduction URL

No response

Screenshots

No response

[noelforte]

This is most likely an issue of how your code interfaces with eleventy-img and not Nunjucks. Nunjucks won't complain because the "image" tag is valid and has associated code to execute, it's the result of the process that controls rendering that tag where your error occurs and that information isn't something Nunjucks knows about.

Your issue stems from this error message:

[11ty] Original error stack trace: Error: `src` is a required argument to the eleventy-img utility (can be a String file path, String URL, or Buffer).

Be sure that you're passing something as src to Image(src, {...options}) otherwise you'll get an error. console.log the src param just before you call Image to debug what's actually getting passed.

Also for future reference, issues regarding eleventy-img should be opened in the 11ty/eleventy-image repo.