Apologies because I'm not sure what's actually the cause of this. 😅 But thought it's better to share the dump than to ignore it.

While working on #15504, SystemMonitor keeps crashing. It happens while WebDriver is running, and pro is stuck waiting for a blocked socket from it.

514.440 SystemMonitor(80:80): ASSERTION FAILED: is_within_range(index)
./Userland/Applications/SystemMonitor/ProcessModel.cpp:143

516.032 CrashReporter(91:92): Generating backtrace took 1355 ms
516.032 CrashReporter(91:92): --- Backtrace for thread #0 (TID 80) ---
516.032 CrashReporter(91:92): 0x00000012625e602b: [/usr/lib/libsystem.so] syscall2 +0xb (syscall.cpp:25 => syscall.cpp:24)
516.036 CrashReporter(91:92): 0x00000009aed23f76: [/usr/lib/libc.so] abort +0x26 (stdlib.cpp:224)
516.036 CrashReporter(91:92): 0x00000009aed2a1de: [/usr/lib/libc.so] __assertion_failed +0x7e (assert.cpp:33)
516.036 CrashReporter(91:92): 0x00000011d8902f2b: [/bin/SystemMonitor] ProcessModel::data(GUI::ModelIndex const&, GUI::ModelRole) const +0xcb (ProcessModel.cpp:143)
516.036 CrashReporter(91:92): 0x000000032fcea955: [/usr/lib/libgui.so.serenity] GUI::SortingProxyModel::data(GUI::ModelIndex const&, GUI::ModelRole) const +0x55 (SortingProxyModel.cpp:116)
516.041 CrashReporter(91:92): 0x000000032fcc95cf: [/usr/lib/libgui.so.serenity] GUI::ModelIndex::data(GUI::ModelRole) const +0x3f (ModelIndex.cpp:19)
516.041 CrashReporter(91:92): 0x000000032fd2b253: [/usr/lib/libgui.so.serenity] AK::Function<AK::IterationDecision (GUI::ModelIndex const&)>::CallableWrapper<GUI::TreeView::traverse_in_paint_order<GUI::TreeView::update_column_sizes()::{lambda(GUI::ModelIndex const&, Gfx::Rect<int> const&, Gfx::Rect<int> const&, int)#1}>(GUI::TreeView::update_column_sizes()::{lambda(GUI::ModelIndex const&, Gfx::Rect<int> const&, Gfx::Rect<int> const&, int)#1}) const::{lambda(GUI::ModelIndex const&)#1}>::call(GUI::ModelIndex const&) +0x93 (TreeView.cpp:188 => Function.h:151)
516.045 CrashReporter(91:92): 0x000000032fd27ad8: [/usr/lib/libgui.so.serenity] GUI::TreeView::update_column_sizes() +0x378 (Function.h:91)
516.045 CrashReporter(91:92): 0x000000032fbf1258: [/usr/lib/libgui.so.serenity] GUI::AbstractTableView::model_did_update(unsigned int) +0x28 (AbstractTableView.cpp:355)
516.045 CrashReporter(91:92): 0x000000032fcc1ecf: [/usr/lib/libgui.so.serenity] GUI::Model::for_each_client(AK::Function<void (GUI::ModelClient&)>) +0x7f (Function.h:91)
516.049 CrashReporter(91:92): 0x000000032fcc1feb: [/usr/lib/libgui.so.serenity] GUI::Model::did_update(unsigned int) +0x4b (Model.cpp:51)
516.049 CrashReporter(91:92): 0x000000032fcc1ecf: [/usr/lib/libgui.so.serenity] GUI::Model::for_each_client(AK::Function<void (GUI::ModelClient&)>) +0x7f (Function.h:91)
516.049 CrashReporter(91:92): 0x000000032fcc1feb: [/usr/lib/libgui.so.serenity] GUI::Model::did_update(unsigned int) +0x4b (Model.cpp:51)
516.049 CrashReporter(91:92): 0x00000011d89055a4: [/bin/SystemMonitor] ProcessModel::update() +0x1054 (ProcessModel.cpp:529)
516.052 CrashReporter(91:92): 0x00000011d88e09ec: [/bin/SystemMonitor] AK::Function<void ()>::CallableWrapper<serenity_main(Main::Arguments)::{lambda()#2}>::call() +0xdc (main.cpp:317)
516.052 CrashReporter(91:92): 0x0000001275e90559: [/usr/lib/libcore.so.serenity] Core::Timer::timer_event(Core::TimerEvent&) +0x69 (Function.h:91)
516.052 CrashReporter(91:92): 0x0000001275e7818a: [/usr/lib/libcore.so.serenity] Core::Object::dispatch_event(Core::Event&, Core::Object*) +0x8a (Object.cpp:220)
516.052 CrashReporter(91:92): 0x0000001275e61849: [/usr/lib/libcore.so.serenity] Core::EventLoop::pump(Core::EventLoop::WaitMode) [clone .localalias] +0x159 (EventLoop.cpp:484)
516.056 CrashReporter(91:92): 0x0000001275e621d9: [/usr/lib/libcore.so.serenity] Core::EventLoop::exec() +0x119 (EventLoop.cpp:441)
516.056 CrashReporter(91:92): 0x00000011d88e3cf2: [/bin/SystemMonitor] serenity_main(Main::Arguments) +0x1682 (main.cpp:490)
516.056 CrashReporter(91:92): 0x00000011d88dc48a: [/bin/SystemMonitor] main +0x9a (Main.cpp:39)
516.056 CrashReporter(91:92): 0x00000011d88dc6c8: [/bin/SystemMonitor] _entry +0x48 (crt0.cpp:43)