SEGV in mjs.c: 9546

[LowryLan]

Invalid write memory access in mjs.c: 9546

Environment

ubuntu20.04

Step to reproduce

1. version
   9eae0e6
2. compile mjs with ASAN

gcc -DMJS_MAIN mjs.c -fsanitize=address -ldl -g -o mjs-bin

3. command for reproducing the error

./mjs-bin -f poc

Download poc:
Invalid_wite_memory_access.zip

ASAN report

AddressSanitizer:DEADLYSIGNAL
=================================================================
==239602==ERROR: AddressSanitizer: SEGV on unknown address 0x000000000000 (pc 0x564d936b81e4 bp 0x000000000022 sp 0x7ffdd2ee5ce0 T0)
==239602==The signal is caused by a WRITE memory access.
==239602==Hint: address points to the zero page.
    #0 0x564d936b81e4 in mjs_execute /home/lowry/Documents/HTFuzz/program/mjs/code/mjs.c:9546
    #1 0x564d936ceee7 in mjs_exec_internal /home/lowry/Documents/HTFuzz/program/mjs/code/mjs.c:9737
    #2 0x564d9360c814 in mjs_exec_file /home/lowry/Documents/HTFuzz/program/mjs/code/mjs.c:9760
    #3 0x564d9360c814 in main /home/lowry/Documents/HTFuzz/program/mjs/code/mjs.c:12030
    #4 0x7f0873941082 in __libc_start_main ../csu/libc-start.c:308
    #5 0x564d9360d26d in _start (/home/lowry/Documents/HTFuzz/program/mjs/code/mjs-bin+0xd26d)

AddressSanitizer can not provide additional info.
SUMMARY: AddressSanitizer: SEGV /home/lowry/Documents/HTFuzz/program/mjs/code/mjs.c:9546 in mjs_execute
==239602==ABORTING