The Order That Stayed Open Debugging Lab

The Order That Stayed OpenReliabilityMediumPreparing workspaceAutosaved

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Incident Dossier

The Order That Stayed Open

A checkout flow records an order as placed even when one of its items cannot be deducted from inventory. The order shows up in the order list, the customer is charged, and the warehouse has no stock to fulfill.

Initial failing signalplaceOrder returns success despite insufficient inventoryExpected rejects with insufficient inventory · received resolves with order recorded

Progress

1Reproduce the bugRun checks

2Edit the fixOpen

3Pass checksOpen

4Submit fixOpen

Reproduction Steps

Run npm test.
Trace the failure handling around the inner deduction step.
Notice that an error from one of the items does not abort the outer call.
Make a failure in any inner step reject the outer placement.

Focus Mode

Start

src/orders.js

Likely area

src/orders.js

Progressive hints

Hints reveal broad direction first, then narrow toward the suspect path without showing hidden tests or exact solution code.

TopicReliability

DifficultyMedium

Est. time18 min

Workspacecreating

Explorer

Preparing workspace files…

Evidence Map

Failing signal loaded from challenge API
Workspace files loaded from workspace API
Results rendered only after API run/submit

Autosaved

workspace

Outputread-onlyready$ workspace boot

Workspace booting...