Attempt to output null record type causes "TypeError: Cannot read properties of null (reading 'length')" #2997
Description
Repro is with Zui commit 205c88c. @mccanne found this issue while shaping some GitHub data for a presentation.
As shown in the attached video, attempting a yield typeof({}) produces a stack trace.
Repro.mp4
The full stack trace:
TypeError: Cannot read properties of null (reading 'length')
at TypeRecordView.iterate (webpack-internal:///./src/app/features/inspector/views/type-record-view.ts:24:47)
at iterate.next (<anonymous>)
at TypeRecordView.renderLine (webpack-internal:///./src/app/features/inspector/views/container-view.ts:63:18)
at TypeRecordView.render (webpack-internal:///./src/app/features/inspector/views/container-view.ts:98:29)
at TypeRecordView.inspect (webpack-internal:///./src/app/features/inspector/views/container-view.ts:36:18)
at Cell.inspect (webpack-internal:///./src/components/zed-table/cell.ts:56:19)
at eval (webpack-internal:///./src/components/zed-table/cell-component.tsx:51:18)
at startTransition (webpack-internal:///../../node_modules/react/cjs/react.development.js:2429:5)
at eval (webpack-internal:///./src/components/zed-table/cell-component.tsx:50:63)
at commitHookEffectListMount (webpack-internal:///../../node_modules/react-dom/cjs/react-dom.development.js:22964:26)
at commitPassiveMountOnFiber (webpack-internal:///../../node_modules/react-dom/cjs/react-dom.development.js:24697:13)
at commitPassiveMountEffects_complete (webpack-internal:///../../node_modules/react-dom/cjs/react-dom.development.js:24661:9)
at commitPassiveMountEffects_begin (webpack-internal:///../../node_modules/react-dom/cjs/react-dom.development.js:24648:7)
at commitPassiveMountEffects (webpack-internal:///../../node_modules/react-dom/cjs/react-dom.development.js:24636:3)
at flushPassiveEffectsImpl (webpack-internal:///../../node_modules/react-dom/cjs/react-dom.development.js:26843:3)
at flushPassiveEffects (webpack-internal:///../../node_modules/react-dom/cjs/react-dom.development.js:26796:14)
at performSyncWorkOnRoot (webpack-internal:///../../node_modules/react-dom/cjs/react-dom.development.js:25910:3)
at flushSyncCallbacks (webpack-internal:///../../node_modules/react-dom/cjs/react-dom.development.js:11982:22)
at commitRootImpl (webpack-internal:///../../node_modules/react-dom/cjs/react-dom.development.js:26771:3)
at commitRoot (webpack-internal:///../../node_modules/react-dom/cjs/react-dom.development.js:26512:5)
at finishConcurrentRender (webpack-internal:///../../node_modules/react-dom/cjs/react-dom.development.js:25815:9)
at performConcurrentWorkOnRoot (webpack-internal:///../../node_modules/react-dom/cjs/react-dom.development.js:25643:7)
at workLoop (webpack-internal:///../../node_modules/scheduler/cjs/scheduler.development.js:266:34)
at flushWork (webpack-internal:///../../node_modules/scheduler/cjs/scheduler.development.js:239:14)
at MessagePort.performWorkUntilDeadline (webpack-internal:///../../node_modules/scheduler/cjs/scheduler.development.js:533:21)