$ ./mjs/build/mjs poc.js
ASAN:DEADLYSIGNAL
=================================================================
==58172==ERROR: AddressSanitizer: SEGV on unknown address 0x55c8c4e9b0dc (pc 0x55c8c4e9b14f bp 0x00000000004c sp 0x7ffe0757c308 T0)
==58172==The signal is caused by a WRITE memory access.
#0 0x55c8c4e9b14e (/usr/local/bin/mjs+0x8814e)
AddressSanitizer can not provide additional info.
SUMMARY: AddressSanitizer: SEGV (/usr/local/bin/mjs+0x8814e)
==58172==ABORTING
mJS revision
Commit: b1b6eac
Build platform
Ubuntu 18.04.5 LTS (Linux 5.4.0-44-generic x86_64)
Build steps
Test case
poc.js
Execution steps & Output
Credits: Found by OWL337 team.