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The following input demonstrates a crash:
==24005==ERROR: AddressSanitizer: SEGV on unknown address 0x000000000001 (pc 0x00010396ee3f bp 0x7fff5c3c4fb0 sp 0x7fff5c3c4ed0 T0)
==24005==The signal is caused by a READ memory access.
==24005==Hint: address points to the zero page.
#0 0x10396ee3e in kh_get_iv variable.c:292
#1 0x103971c3e in iv_get variable.c:320
#2 0x103971a6a in mrb_obj_iv_get variable.c:473
#3 0x10387018c in mrb_class_path class.c:1595
#4 0x103880ade in mrb_mod_to_s class.c:1786
#5 0x10399eedf in mrb_vm_exec vm.c:1327
#6 0x103993886 in mrb_vm_run vm.c:861
#7 0x1039c79bf in mrb_top_run vm.c:2750
#8 0x103a99d95 in mrb_load_exec parse.y:5780
#9 0x103a9a6e5 in mrb_load_file_cxt parse.y:5789
#10 0x103832a46 in main mruby.c:227
#11 0x7fffe5638234 in start (libdyld.dylib:x86_64+0x5234)
rax = 0x0000000000000001 rbx = 0x00007fff5c3c50a0 rcx = 0x0000100000000000 rdx = 0x0000000000000882
rdi = 0x0000100000000000 rsi = 0x0000000000000001 rbp = 0x00007fff5c3c4fb0 rsp = 0x00007fff5c3c4ed0
r8 = 0x00007fff5c3c5000 r9 = 0x00000000000002a2 r10 = 0x000062f000001c48 r11 = 0x00001c5e00000389
r12 = 0x00007fff5c3c5200 r13 = 0x00007fff5c3c5220 r14 = 0x0000100000000000 r15 = 0x00007fff5c3c51e0
AddressSanitizer can not provide additional info.
SUMMARY: AddressSanitizer: SEGV variable.c:292 in kh_get_iv
Abort trap: 6
This issue was reported by https://hackerone.com/ahihi
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