TypeError: can't access property "forceUpdate", e.curOp is null

[ops-handler]

Error

can't access property "forceUpdate", e.curOp is null

Stack trace

../node_modules/easymde/node_modules/codemirror/lib/codemirror.js:2419 in prepareMeasureForLine
../node_modules/easymde/node_modules/codemirror/lib/codemirror.js:2677 in cursorCoords
../node_modules/easymde/node_modules/codemirror/lib/codemirror.js:3485 in scrollPosIntoView
../node_modules/easymde/node_modules/codemirror/lib/codemirror.js:3943 in endOperation_finish
../node_modules/easymde/node_modules/codemirror/lib/codemirror.js:3862 in endOperations
../node_modules/easymde/node_modules/codemirror/lib/codemirror.js:3845 in endCb
../node_modules/easymde/node_modules/codemirror/lib/codemirror.js:2073 in finishOperation
../node_modules/easymde/node_modules/codemirror/lib/codemirror.js:3842 in endOperation
../node_modules/easymde/node_modules/codemirror/lib/codemirror.js:3979 in ht</</je/<
../node_modules/@sentry/browser/src/helpers.ts:117 in sentryWrapped

Tracking Details

• Project: exercism-js
• Sentry: TypeError: can't access property "forceUpdate", e.curOp is null
• Culprit: prepareMeasureForLine(easymde/node_modules/codemirror/lib/codemirror)
• First seen: Apr 6, 2026