TypeError: Cannot read properties of undefined (reading 'find')

[ops-handler]

Error

Cannot read properties of undefined (reading 'find')

Stack trace

../node_modules/easymde/node_modules/codemirror/addon/selection/mark-selection.js:95 in update
../node_modules/easymde/node_modules/codemirror/addon/selection/mark-selection.js:38 in f
../node_modules/easymde/node_modules/codemirror/lib/codemirror.js:3968 in runInOp
../node_modules/easymde/node_modules/codemirror/lib/codemirror.js:8678 in CodeMirror.prototypeoperation
../node_modules/easymde/node_modules/codemirror/addon/selection/mark-selection.js:38 in onCursorActivity
../node_modules/easymde/node_modules/codemirror/lib/codemirror.js:2061 in fireCallbacksForOps
../node_modules/easymde/node_modules/codemirror/lib/codemirror.js:2070 in finishOperation
../node_modules/easymde/node_modules/codemirror/lib/codemirror.js:3842 in endOperation
../node_modules/easymde/node_modules/codemirror/lib/codemirror.js:3998 in lt.setSelection
../node_modules/easymde/node_modules/codemirror/lib/codemirror.js:9847 in Ee.setSelection

Tracking Details

• Project: exercism-js
• Sentry: TypeError: Cannot read properties of undefined (reading 'find')
• Culprit: update(easymde/node_modules/codemirror/addon/selection/mark-selection)
• First seen: Jun 24, 2026