[BUG]: Cannot initialize tracer when importing package.json while using Bun #7480
Description
Tracer Version(s)
5.85.0
Node.js Version(s)
Bun 1.3.8
Bug Report
After importing package.json as an ESM module and then initializing Tracer, the following error occurs.
39 |
40 | directory = path.dirname(directory)
41 | }
42 | }
43 |
44 | module.exports = Object.assign(findPkg(), { findRoot, findUp })
^
TypeError: Attempted to assign to readonly property.
at <anonymous> (/Users/t-ozawa/Toggle/trace-test/node_modules/.bun/[email protected]/node_modules/dd-trace/packages/dd-trace/src/pkg.js:44:25)
Bun caches a read-only module namespace when loading JSON via ESM. Currently, dd-trace's pkg.js attempts to append to the return value of require('package.json') using Object.assign(..., { findRoot, findUp }), which causes it to crash due to trying to write to that read-only object.
Reproduction Code
import tracer from "dd-trace";
import pkg from "./package.json";
console.log(pkg.version);
tracer.init();
Error Logs
39 |
40 | directory = path.dirname(directory)
41 | }
42 | }
43 |
44 | module.exports = Object.assign(findPkg(), { findRoot, findUp })
^
TypeError: Attempted to assign to readonly property.
at <anonymous> (/Users/t-ozawa/Toggle/trace-test/node_modules/.bun/[email protected]/node_modules/dd-trace/packages/dd-trace/src/pkg.js:44:25)
at getProcessTags (/Users/t-ozawa/Toggle/trace-test/node_modules/.bun/[email protected]/node_modules/dd-trace/packages/dd-trace/src/process-tags/index.js:18:9)
at <anonymous> (/Users/t-ozawa/Toggle/trace-test/node_modules/.bun/[email protected]/node_modules/dd-trace/packages/dd-trace/src/process-tags/index.js:60:18)
at <anonymous> (/Users/t-ozawa/Toggle/trace-test/node_modules/.bun/[email protected]/node_modules/dd-trace/packages/dd-trace/src/span_format.js:8:9)
at <anonymous> (/Users/t-ozawa/Toggle/trace-test/node_modules/.bun/[email protected]/node_modules/dd-trace/packages/dd-trace/src/span_processor.js:4:7)
Bun v1.3.8 (macOS arm64)
Tracer Config
No configuration
Operating System
macOS 14.6.1
Bundling
Unsure