$ ./mjs/build/mjs poc.js
ASAN:DEADLYSIGNAL
=================================================================
==82386==ERROR: AddressSanitizer: SEGV on unknown address 0x0000000000e4 (pc 0x55a4aeab6fd4 bp 0x00000000008c sp 0x7ffc17a28520 T0)
==82386==The signal is caused by a READ memory access.
==82386==Hint: address points to the zero page.
#0 0x55a4aeab6fd3 in add_lineno_map_item src/mjs_bcode.c:15
#1 0x55a4aeab6fd3 in emit_int src/mjs_bcode.c:47
#2 0x55a4aeb600dd in parse_comparison src/mjs_parser.c:431
#3 0x55a4aeb600dd in parse_equality src/mjs_parser.c:435
#4 0x55a4aeb65d0b in parse_bitwise_and src/mjs_parser.c:440
#5 0x55a4aeb65d0b in parse_bitwise_xor src/mjs_parser.c:445
#6 0x55a4aeb32177 in parse_bitwise_or src/mjs_parser.c:450
#7 0x55a4aeb32177 in parse_logical_and src/mjs_parser.c:455
#8 0x55a4aeb32177 in parse_logical_or src/mjs_parser.c:460
#9 0x55a4aeb32177 in parse_ternary src/mjs_parser.c:465
#10 0x55a4aeb32177 in parse_assignment src/mjs_parser.c:503
#11 0x55a4aeb388d7 in parse_expr src/mjs_parser.c:507
#12 0x55a4aeb388d7 in parse_statement src/mjs_parser.c:945
AddressSanitizer can not provide additional info.
SUMMARY: AddressSanitizer: SEGV src/mjs_bcode.c:15 in add_lineno_map_item
==82386==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.