Ajv issue

/* * This attempts to track an issue with ajv and standalone module generation which appears to happen * only on Deno and only on ESM modules provided by skypack (or esm.sh). * * A minimal reproduction on Deno follows */ // On Deno, we import from skypack. This gets 8.8.2 as of 2021-12-15: // import Ajv from "https://cdn.skypack.dev/ajv"; // import standalone from "https://cdn.skypack.dev/ajv/dist/standalone"; // // the same issue happens if we import from esm.sh: // // import Ajv from "https://esm.sh/ajv"; // import standalone from "https://esm.sh/ajv/dist/standalone"; // on node v17.1.0 on runkit: var Ajv = require('ajv'); var standalone = require('ajv/dist/standalone'); ajv = new Ajv({ allErrors: true, code: { source: true } }); var schema = { "type": "object", "properties": { "f1": { "type": "string" }, "f2": { "type": "array", "items": { "$ref": "navigation-item" } } }, "additionalProperties": false, "$id": "navigation-item" }; var data = {}; var validate = ajv.compile(schema); var moduleSrc = standalone(ajv, { "navigation-item": "navigation-item" }); /* the call above fails on Deno v1.16.4. The error message is: > const moduleSrc = standalone(ajv, { "navigation-item": "navigation-item" }) --> starting at object with constructor 'SchemaEnv' | property 'refs' -> object with constructor 'Object' --- property 'navigation-item' closes the circle at JSON.stringify (<anonymous>) at safeStringify (https://cdn.skypack.dev/-/ajv@v8.8.2-oHh4dWmHmt5cH6zohUYk/dist=es2019,mode=imports/unoptimized/dist/compile/codegen/code.js:138:17) at interpolate (https://cdn.skypack.dev/-/ajv@v8.8.2-oHh4dWmHmt5cH6zohUYk/dist=es2019,mode=imports/unoptimized/dist/compile/codegen/code.js:131:78) at addCodeArg (https://cdn.skypack.dev/-/ajv@v8.8.2-oHh4dWmHmt5cH6zohUYk/dist=es2019,mode=imports/unoptimized/dist/compile/codegen/code.js:91:17) at Object._ (https://cdn.skypack.dev/-/ajv@v8.8.2-oHh4dWmHmt5cH6zohUYk/dist=es2019,mode=imports/unoptimized/dist/compile/codegen/code.js:66:7) at refValidateCode (https://cdn.skypack.dev/-/ajv@v8.8.2-oHh4dWmHmt5cH6zohUYk/dist=es2019,mode=imports/unoptimized/dist/standalone/index.js:63:35) at https://cdn.skypack.dev/-/ajv@v8.8.2-7PXBFgVwJaIVYRDIomxs/dist=es2019,mode=imports/optimized/ajv.js:287:76 at Set.forEach (<anonymous>) at ValueScope._reduceValues (https://cdn.skypack.dev/-/ajv@v8.8.2-7PXBFgVwJaIVYRDIomxs/dist=es2019,mode=imports/optimized/ajv.js:279:12) at ValueScope.scopeCode (https://cdn.skypack.dev/-/ajv@v8.8.2-7PXBFgVwJaIVYRDIomxs/dist=es2019,mode=imports/optimized/ajv.js:266:19) */ console.log(moduleSrc); // console.log(validate.errors);