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fix: Add better error message when lockfile is malformed #6997

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fix: Add better error message when lockfile is malformed #6997

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4 changes: 4 additions & 0 deletions workspaces/arborist/lib/arborist/load-virtual.js
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Original file line number Diff line number Diff line change
Expand Up @@ -2,6 +2,7 @@
const mapWorkspaces = require('@npmcli/map-workspaces')

const { resolve } = require('path')
const assert = require('assert');

const nameFromFolder = require('@npmcli/name-from-folder')
const consistentResolve = require('../consistent-resolve.js')
Expand Down Expand Up @@ -200,6 +201,9 @@ module.exports = cls => class VirtualLoader extends cls {
const targetPath = resolve(this.path, meta.resolved)
const targetLoc = relpath(this.path, targetPath)
const target = nodes.get(targetLoc)

assert(target, `Missing target node for "${targetLoc}", remove the entry in your lock file and try again.`);

const link = this.#loadLink(location, targetLoc, target, meta)
nodes.set(location, link)
nodes.set(targetLoc, link.target)
Expand Down