An issue was discovered in JerryScript 2.4.0. There is a SEGV in main_print_unhandled_exception in main-utils.c file.

###### JerryScript revision
2faafa4
###### Build platform
Ubuntu 18.04.5 LTS(Linux 4.15.0-119-generic x86_64)
###### Build steps
```
./tools/build.py --clean --debug --compile-flag=-fsanitize=address \
--compile-flag=-m32 --compile-flag=-fno-omit-frame-pointer \
--compile-flag=-fno-common --compile-flag=-g --strip=off \
--system-allocator=on --logging=on --linker-flag=-fuse-ld=gold \
--error-messages=on --profile=es2015-subset  --builddir=$PWD/build
```

###### Test case
```
throw new SyntaxError("[0: 98, 1: 54, 8: false, 10: 21, foo: bar]");
```
###### Output
```
Error: Failed to open file: 0
ASAN:DEADLYSIGNAL
=================================================================
==13994==ERROR: AddressSanitizer: SEGV on unknown address 0x00000000 (pc 0x5678dd4b bp 0xffca4f88 sp 0xffca4d10 T0)
==13994==The signal is caused by a READ memory access.
==13994==Hint: address points to the zero page.
    #0 0x5678dd4a in main_print_unhandled_exception /root/jerryscript/jerry-main/main-utils.c:341
    #1 0x5678baae in main /root/jerryscript/jerry-main/main-unix.c:140
    #2 0xf7760f20 in __libc_start_main (/lib32/libc.so.6+0x18f20)
    #3 0x5662c3d0  (/root/jerryscript/build/bin/jerry+0x1d3d0)

AddressSanitizer can not provide additional info.
SUMMARY: AddressSanitizer: SEGV /root/jerryscript/jerry-main/main-utils.c:341 in main_print_unhandled_exception
==13994==ABORTING
```
Credits: Found by chong from OWL337.
SEGV in main_print_unhandled_exception
This is a GitHub Issue
repo:jerryscript
owner:jerryscript-project
Title : SEGV in main_print_unhandled_exception
Issue date:

--- start body ---

###### JerryScript revision
2faafa4
###### Build platform
Ubuntu 18.04.5 LTS(Linux 4.15.0-119-generic x86_64)
###### Build steps
```
./tools/build.py --clean --debug --compile-flag=-fsanitize=address \
--compile-flag=-m32 --compile-flag=-fno-omit-frame-pointer \
--compile-flag=-fno-common --compile-flag=-g --strip=off \
--system-allocator=on --logging=on --linker-flag=-fuse-ld=gold \
--error-messages=on --profile=es2015-subset  --builddir=$PWD/build
```

###### Test case
```
throw new SyntaxError("[0: 98, 1: 54, 8: false, 10: 21, foo: bar]");
```
###### Output
```
Error: Failed to open file: 0
ASAN:DEADLYSIGNAL
=================================================================
==13994==ERROR: AddressSanitizer: SEGV on unknown address 0x00000000 (pc 0x5678dd4b bp 0xffca4f88 sp 0xffca4d10 T0)
==13994==The signal is caused by a READ memory access.
==13994==Hint: address points to the zero page.
    #0 0x5678dd4a in main_print_unhandled_exception /root/jerryscript/jerry-main/main-utils.c:341
    #1 0x5678baae in main /root/jerryscript/jerry-main/main-unix.c:140
    #2 0xf7760f20 in __libc_start_main (/lib32/libc.so.6+0x18f20)
    #3 0x5662c3d0  (/root/jerryscript/build/bin/jerry+0x1d3d0)

AddressSanitizer can not provide additional info.
SUMMARY: AddressSanitizer: SEGV /root/jerryscript/jerry-main/main-utils.c:341 in main_print_unhandled_exception
==13994==ABORTING
```
Credits: Found by chong from OWL337.
--- end body ---
