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1 parent fbc890a commit 1072303Copy full SHA for 1072303
src/internal/getReactStack.js
@@ -42,7 +42,10 @@ const markUpdate = ({ fiber }) => {
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if (fiber.alternate) {
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fiber.alternate.expirationTime = 1;
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fiber.alternate.type = fiber.type;
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- fiber.alternate.elementType = fiber.elementType;
+ // elementType might not exists in older react versions
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+ if ('elementType' in fiber.alternate) {
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+ fiber.alternate.elementType = fiber.elementType;
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+ }
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}
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if (fiber.memoizedProps && typeof fiber.memoizedProps === 'object') {
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