{"record":{"id":"06be07f0b581f460","repo":"facebook/react","slug":"attempted-to-measure-a-suspense-node-that-does-not","errorCode":null,"errorMessage":"Attempted to measure a Suspense node that does not exist.","messagePattern":"Attempted to measure a Suspense node that does not exist\\.","errorType":"exception","errorClass":"Error","httpStatus":null,"severity":"error","filePath":"packages/react-devtools-shared/src/backend/fiber/renderer.js","lineNumber":4883,"sourceCode":"          // Let the closest unfiltered parent Fiber reset its child order instead.\n        }\n      }\n\n      return updateFlags;\n    } finally {\n      if (fiberInstance !== null) {\n        unmountRemainingChildren();\n        reconcilingParent = stashedParent;\n        previouslyReconciledSibling = stashedPrevious;\n        remainingReconcilingChildren = stashedRemaining;\n        if (shouldMeasureSuspenseNode) {\n          if (!isInDisconnectedSubtree) {\n            // Measure this Suspense node in case it changed. We don't update the rect\n            // while we're inside a disconnected subtree so that we keep the outline\n            // as it was before we hid the parent.\n            const suspenseNode = fiberInstance.suspenseNode;\n            if (suspenseNode === null) {\n              throw new Error(\n                'Attempted to measure a Suspense node that does not exist.',\n              );\n            }\n            const prevRects = suspenseNode.rects;\n            const nextRects = measureInstance(fiberInstance);\n            if (!areEqualRects(prevRects, nextRects)) {\n              suspenseNode.rects = nextRects;\n              recordSuspenseResize(suspenseNode);\n            }\n          }\n        }\n        if (shouldPopSuspenseNode) {\n          reconcilingParentSuspenseNode = stashedSuspenseParent;\n          previouslyReconciledSiblingSuspenseNode = stashedSuspensePrevious;\n          remainingReconcilingChildrenSuspenseNodes = stashedSuspenseRemaining;\n        }\n        isInFocusedActivity = stashedIsInActivitySlice;\n      }","sourceCodeStart":4865,"sourceCodeEnd":4901,"githubUrl":"https://github.com/facebook/react/blob/eafeac097ba51e1eab809c07102126bd5f8e5425/packages/react-devtools-shared/src/backend/fiber/renderer.js#L4865-L4901","documentation":"Post-update measurement invariant: shouldMeasureSuspenseNode was requested for a fiber instance, the subtree is connected, but fiberInstance.suspenseNode is null - there is no SuspenseNode to write the measured rects to. The measurement bookkeeping (who owns the suspense outline/rect) went missing before the rect update ran.","triggerScenarios":"A Suspense boundary's SuspenseNode was popped or never created while its instance still requests re-measurement; interleaved suspend/resume commits; state desync after an earlier invariant failure in the same session.","commonSituations":"Highlight/rect updates for Suspense boundaries with the Components tree open on React/DevTools version mismatches; recovery after a prior swallowed DevTools error.","solutions":["Reload the inspected page to rebuild the backend mirror","Update React DevTools to match the React version","Report the commit sequence (suspense suspend/resume with DevTools open) as a repro","If embedding the backend, treat this as non-fatal and skip the rect update"],"exampleFix":null,"handlingStrategy":"try-catch","validationCode":null,"typeGuard":null,"tryCatchPattern":"try {\n  backend.handleCommitFiberRoot(renderer, root);\n} catch (e) {\n  if (/Attempted to measure a Suspense node that does not exist/.test(e.message)) {\n    skipRectUpdateAndLog(instance); // rect bookkeeping lost; non-fatal\n  } else throw e;\n}","preventionTips":["Reload to rebuild SuspenseNode ownership after earlier traversal errors","Match DevTools and React versions for Suspense rect/highlight tracking","Report suspend/resume commit sequences observed with the Components tree open","Treat as non-fatal when embedding - skip the measurement rather than crashing the bridge"],"tags":["react-devtools","invariant","suspense","measurement","highlight","internal"],"backgroundTag":"suspense-boundary-invariant-violation","analyzedSha":"eafeac097ba51e1eab809c07102126bd5f8e5425","analyzedAt":"2026-08-21T22:01:08.818Z","schemaVersion":2},"datasetVersion":"2026-08-21T23:17:16.201Z"}