[Error] - Cannot convert undefined or null to object (auto-install-peers=true)

[raulfdm]

pnpm version: 7.1.5

Code to reproduce the issue:

• pnpm.debug.log: https://mega.nz/file/It11VQ6Y#bgxRFLnQqqclN8npto-VUosfrHK3TC6Q-YMvmhcqzAE (couldn't paste here due Github limitation Comment is too long (maximum is 65536 characters))

1. Clone this repo: https://github.com/raulfdm/raulmelo-studio
2. Checkout to the branch cannot-convert-undefined-or-null-to-object
3. Run pnpm i
4. See the error Cannot convert undefined or null to object

You can also try remove pnpm.lock.yaml and run pnpm i again. The error will still remain.

I think this is, somehow, related to auto-install-peers=true present in the .npmrc because if I:

1. set auto-install-peers to false;
2. run pnpm i (it'll run successfuly) and throw errors due missing peerDeps;
3. set auto-install-peers to true;
4. runpnpm i --force (no missing peerDeps error)

I won't get Cannot convert undefined or null to object.

Expected behavior:

Either install deps and regen lock file or give me a good error message so I have a clue what's wrong and fix the issue.

Actual behavior:

Blocks the installation.

Additional information:

• node -v prints: v16.14.2
• Windows, macOS, or Linux?: macOS Monterey 12.4 - Apple M1 PRO

[raulfdm]

I had done the workaround in my main branch and thought it was about working but I notice the the error come back if I run pnpm i --lockfile-only:

➜  raulmelo-studio git:(main) ✗ pnpm i
Scope: all 8 workspace projects
Lockfile is up-to-date, resolution step is skipped
Already up-to-date
apps/fitness-buddy postinstall$ pnpm run typegen
│ > fitness-buddy@0.0.1 typegen /Users/raulmelo/development/raulmelo-studio/apps/fitness-buddy
│ > xstate typegen "src/**/*.ts?(x)"
│ src/lib/stores/trainingMachine.ts - success
└─ Done in 713ms
apps/fitness-buddy prepare$ svelte-kit sync
└─ Done in 191ms

➜  raulmelo-studio git:(main) ✗ pnpm i --lockfile-only
Scope: all 8 workspace projects
 WARN  `node_modules` is present. Lockfile only installation will make it out-of-date
 ERROR  Cannot convert undefined or null to object
Progress: resolved 0, reused 1, downloaded 0, added 0

[zkochan]

It is a duplicate of #4796

[tanBeehexa]

I fix it by reinstall/updating lockfile