Uncaught TypeError: Cannot read property 'value' of null

[gertqin]

This seems to be the same as #460 but we still experience the error in 0.9.14.

I've tried to reproduce the error in a small example app, but unfortunately I couldn't :( (and I cannot share our real app). Then I tried to debug what caused the problem, and so far I've discovered that before the error occurs, a node is added to the DoubleLinkedList which has a sibling with the __ln property, but the linked list is empty (i.e. head is null).

I don't know how that can happen - my only guess is that somehow the DOM reuses a node added in an earlier processMutation cycle. Can you guess what is happening from these screenshots? Or can you tell me what else you would like me to debug, in order to find the cause of the problem?

[guillaume-ro-fr]

I have the same problem with Angular and ng-select when the selector was empty and a selection is made.

[Yuyz0112]

@guillaume-ro-fr Do you have any reproducible code or URL?

[jeffxenog]

当遇到想要在头部前插入一个节点的时候，下面的代码会造成head指针不正确，current是null

rrweb/src/record/mutation.ts

Line 65 in e558743

} else if (n.nextSibling && isNodeInLinkedList(n.nextSibling)) {

rrweb/src/record/mutation.ts

Line 66 in e558743

const current = n.nextSibling.__ln.previous;

是否应该要增加判断n.nextSibling.__ln.previous存在

else if (n.nextSibling && isNodeInLinkedList(n.nextSibling) && n.nextSibling.__ln.previous ) {

[Yuyz0112]

@jeffxenog 是的，这里看起来是有问题的，感谢！