Trace:

[WebContent(135:135)]: ASSERTION FAILED: !is_queued()
[WebContent(135:135)]: ../.././Kernel/TimerQueue.h:27 in void Kernel::Timer::setup(clockid_t, AK::Time, AK::Function<void()>&&)
[WebContent(135:135)]: KERNEL PANIC! :^(
[WebContent(135:135)]: Aborted
[WebContent(135:135)]: at ../../Kernel/Arch/x86/common/CPU.cpp:29 in void abort()
[WebContent(135:135)]: Kernel + 0x0083e622  Kernel::__panic(char const*, unsigned int, char const*) +0x68
[WebContent(135:135)]: Kernel + 0x00c154ae  abort.localalias +0x1f0
[WebContent(135:135)]: Kernel + 0x00c1553f  void AK::critical_dmesgln<char const*>(AK::Format::Detail::CheckedFormatString<AK::Detail::__IdentityType<char const*>::Type>&&, char const* const&) +0x0
[WebContent(135:135)]: Kernel + 0x00be7ffb  Kernel::TimerQueue::add_timer_without_id(AK::NonnullRefPtr<Kernel::Timer>, int, AK::Time const&, AK::Function<void ()>&&) +0x64b
[WebContent(135:135)]: Kernel + 0x00a65ebe  Kernel::Thread::BlockResult Kernel::Thread::block<Kernel::Thread::SelectBlocker, AK::Vector<Kernel::Thread::SelectBlocker::FDInfo, 1024ul>&>(Kernel::Thread::BlockTimeout const&, AK::Vector<Kernel::Thread::SelectBlocker::FDInfo, 1024ul>&) +0xd0e
[WebContent(135:135)]: Kernel + 0x00a5bc61  Kernel::Process::sys$select(AK::Userspace<Kernel::Syscall::SC_select_params const*>) +0x32e1
[WebContent(135:135)]: Kernel + 0x008ed19e  Kernel::Syscall::handle(Kernel::RegisterState&, unsigned int, unsigned int, unsigned int, unsigned int, unsigned int) +0x189f
[WebContent(135:135)]: Kernel + 0x008eea10  syscall_handler +0x14a6
[WebContent(135:135)]: Kernel + 0x008eabb1  syscall_asm_entry +0x31