TypeError: Cannot read property 'length' of undefined
/vs/workbench/contrib/debug/browser/repl.ts#772:64 (getHeight)
/vs/base/browser/ui/tree/abstractTree.ts#172:23 (getHeight)
/vs/base/browser/ui/tree/abstractTree.ts#172:23 (getHeight)
/vs/base/browser/ui/list/listView.ts#302:30
at Array.map ()
/vs/base/browser/ui/list/listView.ts#298:28 (_splice)
/vs/base/browser/ui/list/listView.ts#278:15 (splice)
/vs/base/browser/ui/list/splice.ts#17:34
at Array.forEach ()
/vs/base/browser/ui/list/splice.ts#17:19 (splice)
/vs/base/browser/ui/list/listWidget.ts#1275:56 (fn)
/vs/base/common/event.ts#792:12 (bufferEvents)
/vs/base/browser/ui/list/listWidget.ts#1275:21 (splice)
/vs/base/browser/ui/tree/abstractTree.ts#1094:8 (splice)
/vs/base/browser/ui/tree/indexTreeModel.ts#161:13 (options)
/vs/base/browser/ui/tree/objectTreeModel.ts#42:46