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fix: handle undefined __filename in bundled environments #4812

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Merged
mcollina merged 1 commit into from
Feb 6, 2026
Merged

fix: handle undefined __filename in bundled environments #4812

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10 changes: 9 additions & 1 deletion index-fetch.js
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Original file line number Diff line number Diff line change
Expand Up @@ -4,6 +4,10 @@ const { getGlobalDispatcher, setGlobalDispatcher } = require('./lib/global')
const EnvHttpProxyAgent = require('./lib/dispatcher/env-http-proxy-agent')
const fetchImpl = require('./lib/web/fetch').fetch

// Capture __filename at module load time for stack trace augmentation.
// This may be undefined when bundled in environments like Node.js internals.
const currentFilename = typeof __filename !== 'undefined' ? __filename : undefined

function appendFetchStackTrace (err, filename) {
if (!err || typeof err !== 'object') {
return
Expand All @@ -30,7 +34,11 @@ function appendFetchStackTrace (err, filename) {

module.exports.fetch = function fetch (init, options = undefined) {
return fetchImpl(init, options).catch(err => {
appendFetchStackTrace(err, __filename)
if (currentFilename) {
appendFetchStackTrace(err, currentFilename)
} else if (err && typeof err === 'object') {
Error.captureStackTrace(err, module.exports.fetch)
}
throw err
})
}
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10 changes: 9 additions & 1 deletion index.js
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Original file line number Diff line number Diff line change
Expand Up @@ -121,6 +121,10 @@ module.exports.getGlobalDispatcher = getGlobalDispatcher

const fetchImpl = require('./lib/web/fetch').fetch

// Capture __filename at module load time for stack trace augmentation.
// This may be undefined when bundled in environments like Node.js internals.
const currentFilename = typeof __filename !== 'undefined' ? __filename : undefined

function appendFetchStackTrace (err, filename) {
if (!err || typeof err !== 'object') {
return
Expand All @@ -147,7 +151,11 @@ function appendFetchStackTrace (err, filename) {

module.exports.fetch = function fetch (init, options = undefined) {
return fetchImpl(init, options).catch(err => {
appendFetchStackTrace(err, __filename)
if (currentFilename) {
appendFetchStackTrace(err, currentFilename)
} else if (err && typeof err === 'object') {
Error.captureStackTrace(err, module.exports.fetch)
}
throw err
})
}
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