site: https://github.com/SerenityOS/jakt/tree/8eee9275f83b548b04bcd873bd65cf325399b2f0/selfhost

To reproduce:
Just go back and forth between the original url and main.jakt a few times

Error:

112.295 [#0 RequestServer(43:43)]: Unrecoverable page fault, read from address V0x00000005
112.295 [#0 RequestServer(43:43)]: Note: Address V0x00000005 looks like a possible nullptr dereference
112.295 [RequestServer(43:43)]: CRASH: CPU #0 Page Fault in ring 3
112.295 [#0 RequestServer(43:43)]: Exception code: 0004 (isr: 0000)
112.295 [#0 RequestServer(43:43)]:     pc=0x001b:0x2f901e12 eflags=0x00010202
112.295 [#0 RequestServer(43:43)]:  stack=0x0023:0x1af45d28
112.295 [#0 RequestServer(43:43)]:     ds=0x0023 es=0x0023 fs=0x0023 gs=0x002b
112.295 [#0 RequestServer(43:43)]:    eax=0x00000001 ebx=0x5dad1d34 ecx=0x0000000f edx=0x1af45dac
112.295 [#0 RequestServer(43:43)]:    ebp=0x1af45d28 esp=0xd11ffee8 esi=0x017efba0 edi=0x01477f20
112.295 [#0 RequestServer(43:43)]:    cr0=0x80010013 cr2=0x00000005 cr3=0x0d9f5000 cr4=0x003406e4
112.295 [#0 RequestServer(43:43)]: 0x2f901e12  (?)

112.295 [#0 RequestServer(43:43)]: Kernel + 0x00d5f5b4  Kernel::Process::crash(int, unsigned int, bool) +0x1e4
112.295 [#0 RequestServer(43:43)]: Kernel + 0x010e25fa  Kernel::handle_crash(Kernel::RegisterState const&, char const*, int, bool) +0x71a
112.295 [#0 RequestServer(43:43)]: Kernel + 0x010ed07d  page_fault_handler +0xafd
112.295 [#0 RequestServer(43:43)]: Kernel + 0x010eb526  page_fault_asm_entry +0x26
112.295 [#0 RequestServer(43:43)]: Process regions:
112.295 [#0 RequestServer(43:43)]: BEGIN         END        SIZE       ACCESS NAME
112.295 [#0 RequestServer(43:43)]: 0x01110000 -- 0x0111ffff 0x00010000 RW     malloc: ChunkedBlock(64)
112.295 [#0 RequestServer(43:43)]: 0x01120000 -- 0x0112ffff 0x00010000 RW     malloc: ChunkedBlock(32)
112.295 [#0 RequestServer(43:43)]: 0x01130000 -- 0x0113ffff 0x00010000 RW     malloc: ChunkedBlock(128)
112.295 [#0 RequestServer(43:43)]: 0x01140000 -- 0x0114ffff 0x00010000 RW     malloc: ChunkedBlock(256)
112.295 [#0 RequestServer(43:43)]: 0x01150000 -- 0x0115ffff 0x00010000 RW     malloc: ChunkedBlock(496)
112.295 [#0 RequestServer(43:43)]: 0x01160000 -- 0x0116ffff 0x00010000 RW     malloc: ChunkedBlock(2032)
112.295 [#0 RequestServer(43:43)]: 0x01170000 -- 0x0117ffff 0x00010000 RW     malloc: ChunkedBlock(16)