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LibWeb: Recompute targetStep during "apply the history step"

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This is an ad-hoc change to account for the fact that we may run
arbitrary code while waiting for the tasks in this function to complete.

I don't have a way to reproduce it, but I've seen trouble caused by
navigables disappearing, which causes the history step numbers to be
disturbed.
This commit is contained in:
Andreas Kling 2024-10-14 07:45:19 +02:00
parent 3ff6137121
commit ac48222ed7
1 changed files with 4 additions and 0 deletions
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4
Userland/Libraries/LibWeb/HTML/TraversableNavigable.cpp
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@ -704,6 +704,10 @@ TraversableNavigable::HistoryStepResult TraversableNavigable::apply_the_history_
if (navigable->has_been_destroyed())
continue;
// AD-HOC: We re-compute targetStep here, since it might have changed since the last time we computed it.
// This can happen if navigables are destroyed while we wait for tasks to complete.
target_step = get_the_used_step(step);
// 7. Let (scriptHistoryLength, scriptHistoryIndex) be the result of getting the history object length and index given traversable and targetStep.
auto history_object_length_and_index = get_the_history_object_length_and_index(target_step);
auto script_history_length = history_object_length_and_index.script_history_length;