"Internal Error: Invalid query plan" error when running tool.

[abachman]

Hi! First, huge thanks for providing this. Already caught an issue for us with graph composition.

I'm running into an error when generating output using the --out option. It runs successfully without the option, but fails with it set. I'm concerned that it may not be producing output for every operation it finds, but I can't tell which operation is causing the issue.

Unset:

$ npx github:@apollosolutions/federation-2-readiness
? Select Graph mygraph
? Select Variant production
✅ Schema composes with Federation v1
✅ Schema composes with Federation v2
? Use the same graphRef? mygraph@production Yes
? Audit Operations in the Last Day
-----------------------------------
✅ Operations audited: 335
🏆 Operations that match: 304
❌ Operations with differences: 31

Add --out <directory> to print reports for each operation.

--out set:

❯ npx github:@apollosolutions/federation-2-readiness --out readiness-output/
? Select Graph mygraph
? Select Variant production
✅ Schema composes with Federation v1
✅ Schema composes with Federation v2
? Use the same graphRef? mygraph@production Yes
? Audit Operations in the Last Day
-----------------------------------
✅ Operations audited: 335
🏆 Operations that match: 304
❌ Operations with differences: 31
Internal Error: Invalid query plan
    at queryPlanToMermaid (file:///Users/me/.npm/_npx/32197df7ba70c1ce/node_modules/@apollosolutions/federation-2-readiness/src/federation/queryPlanToMermaid.js:100:11)
    at AuditCommand.execute (file:///Users/me/.npm/_npx/32197df7ba70c1ce/node_modules/@apollosolutions/federation-2-readiness/src/commands/audit.js:391:15)
    at async AuditCommand.validateAndExecute (/Users/me/.npm/_npx/32197df7ba70c1ce/node_modules/clipanion/lib/advanced/Command.js:73:26)
    at async Cli.run (/Users/me/.npm/_npx/32197df7ba70c1ce/node_modules/clipanion/lib/advanced/Cli.js:222:24)
    at async Cli.runExit (/Users/me/.npm/_npx/32197df7ba70c1ce/node_modules/clipanion/lib/advanced/Cli.js:231:28)