==36961== Memcheck, a memory error detector
==36961== Copyright (C) 2002-2017, and GNU GPL'd, by Julian Seward et al.
==36961== Using Valgrind-3.18.1 and LibVEX; rerun with -h for copyright info
==36961== Command: php index.php
==36961== 
==36961== Invalid read of size 1
==36961==    at 0x7B6CF40: zend_string_copy (zend_string.h:194)
==36961==    by 0x7B6CF40: xdebug_debugger_set_program_name (debugger.c:104)
==36961==    by 0x7B558EB: xdebug_execute_user_code_begin (base.c:731)
==36961==    by 0x488A58: ??? (in /usr/bin/php8.1)
==36961==    by 0x460CFF: zend_execute (in /usr/bin/php8.1)
==36961==    by 0x3F0D1F: zend_execute_scripts (in /usr/bin/php8.1)
==36961==    by 0x38B9E9: php_execute_script (in /usr/bin/php8.1)
==36961==    by 0x4D9E5D: ??? (in /usr/bin/php8.1)
==36961==    by 0x230096: ??? (in /usr/bin/php8.1)
==36961==    by 0x5157D8F: (below main) (libc_start_call_main.h:58)
==36961==  Address 0x4 is not stack'd, malloc'd or (recently) free'd
==36961== 
==36961== 
==36961== Process terminating with default action of signal 11 (SIGSEGV)
==36961==  Access not within mapped region at address 0x4
==36961==    at 0x7B6CF40: zend_string_copy (zend_string.h:194)
==36961==    by 0x7B6CF40: xdebug_debugger_set_program_name (debugger.c:104)
==36961==    by 0x7B558EB: xdebug_execute_user_code_begin (base.c:731)
==36961==    by 0x488A58: ??? (in /usr/bin/php8.1)
==36961==    by 0x460CFF: zend_execute (in /usr/bin/php8.1)
==36961==    by 0x3F0D1F: zend_execute_scripts (in /usr/bin/php8.1)
==36961==    by 0x38B9E9: php_execute_script (in /usr/bin/php8.1)
==36961==    by 0x4D9E5D: ??? (in /usr/bin/php8.1)
==36961==    by 0x230096: ??? (in /usr/bin/php8.1)
==36961==    by 0x5157D8F: (below main) (libc_start_call_main.h:58)
==36961==  If you believe this happened as a result of a stack
==36961==  overflow in your program's main thread (unlikely but
==36961==  possible), you can try to increase the size of the
==36961==  main thread stack using the --main-stacksize= flag.
==36961==  The main thread stack size used in this run was 8388608.
==36961== 
==36961== HEAP SUMMARY:
==36961==     in use at exit: 4,562,583 bytes in 30,685 blocks
==36961==   total heap usage: 37,656 allocs, 6,971 frees, 6,036,168 bytes allocated
==36961== 
==36961== LEAK SUMMARY:
==36961==    definitely lost: 27,809 bytes in 867 blocks
==36961==    indirectly lost: 40 bytes in 1 blocks
==36961==      possibly lost: 2,970,746 bytes in 22,018 blocks
==36961==    still reachable: 1,563,988 bytes in 7,799 blocks
==36961==         suppressed: 0 bytes in 0 blocks
==36961== Rerun with --leak-check=full to see details of leaked memory
==36961== 
==36961== For lists of detected and suppressed errors, rerun with: -s
==36961== ERROR SUMMARY: 1 errors from 1 contexts (suppressed: 0 from 0)