008+ prompt> ASAN:DEADLYSIGNAL
009+ =================================================================
010+ ==17909==ERROR: AddressSanitizer: SEGV on unknown address 0x7f7c42815080 (pc 0x00000186acd4 bp 0x7ffcd65487b0 sp 0x7ffcd6548430 T0)
011+ ==17909==The signal is caused by a WRITE memory access.
012+ #0 0x186acd3 in ZEND_ASSIGN_SPEC_CV_CONST_RETVAL_UNUSED_HANDLER (/home/fuzzer/PHP/php-7.1.0/sapi/phpdbg/phpdbg+0x186acd3)
013+ #1 0x1bd660d in zend_vm_call_opcode_handler (/home/fuzzer/PHP/php-7.1.0/sapi/phpdbg/phpdbg+0x1bd660d)
014+ #2 0x1cb4016 in phpdbg_execute_ex (/home/fuzzer/PHP/php-7.1.0/sapi/phpdbg/phpdbg+0x1cb4016)
015+ #3 0x17ac21a in zend_execute (/home/fuzzer/PHP/php-7.1.0/sapi/phpdbg/phpdbg+0x17ac21a)
016+ #4 0x1c9c7a4 in phpdbg_do_run (/home/fuzzer/PHP/php-7.1.0/sapi/phpdbg/phpdbg+0x1c9c7a4)
017+ #5 0x1d06e2f in phpdbg_internal_stack_execute (/home/fuzzer/PHP/php-7.1.0/sapi/phpdbg/phpdbg+0x1d06e2f)
018+ #6 0x1d067bf in phpdbg_stack_execute (/home/fuzzer/PHP/php-7.1.0/sapi/phpdbg/phpdbg+0x1d067bf)
019+ #7 0x1cac569 in phpdbg_interactive (/home/fuzzer/PHP/php-7.1.0/sapi/phpdbg/phpdbg+0x1cac569)
008- prompt> [Breaking on watchpoint $a]
009- Old value:
010- New value: aa
011- >00005: $a[1] = "b";
012- 00006:
013- prompt> [Breaking on watchpoint $a]
014- Old value: aa
015- New value: ab
016- >00006:
017- prompt> [$a has been removed, removing watchpoint]
018- [Script ended normally]
019- prompt>
020+ #8 0x1c7c28a in main (/home/fuzzer/PHP/php-7.1.0/sapi/phpdbg/phpdbg+0x1c7c28a)
021+ #9 0x7f7c478c082f in __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x2082f)
022+ #10 0x43b638 in _start (/home/fuzzer/PHP/php-7.1.0/sapi/phpdbg/phpdbg+0x43b638)
023+
024+ AddressSanitizer can not provide additional info.
025+ SUMMARY: AddressSanitizer: SEGV (/home/fuzzer/PHP/php-7.1.0/sapi/phpdbg/phpdbg+0x186acd3) in ZEND_ASSIGN_SPEC_CV_CONST_RETVAL_UNUSED_HANDLER
026+ ==17909==ABORTING