readline memory leak

[chongwick]

Description

The following code:

<?php
$v_55941 = '/tmp';
$v_55942 = 'readline.tmp';
$v_55943 = tempnam($v_55941,$v_55942,);
$v_55944 = 'line_buffer';
$v_55945 = readline_info($v_55944,);
$v_55947 = 'line_buffer';
$v_55948 = 'abcdef';
$v_55949 = readline_info($v_55947,$v_55948,);
#$v_55985 = '+5 days';
$v_55951 = readline_info($v_55985,);
$v_55953 = '123';
$v_55954 = readline_add_history($v_55953,);

Resulted in this output:

Warning: Undefined variable $v_55985 in 0c143fd4c4dc3b865f77.php.er on line 11

=================================================================
==1870153==ERROR: LeakSanitizer: detected memory leaks

Direct leak of 7 byte(s) in 1 object(s) allocated from:
    #0 0x66cd54 in strdup (/home/w023dtc/nightly_php/php-src/sapi/cli/php+0x66cd54)
    #1 0x36c77c1 in zif_readline_info /home/w023dtc/nightly_php/php-src/ext/readline/readline.c:199:17
    #2 0x5fd774f in ZEND_DO_ICALL_SPEC_RETVAL_USED_HANDLER /home/w023dtc/nightly_php/php-src/Zend/zend_vm_execute.h:1410:2
    #3 0x5af34e3 in execute_ex /home/w023dtc/nightly_php/php-src/Zend/zend_vm_execute.h:113454:12
    #4 0x5af5a6c in zend_execute /home/w023dtc/nightly_php/php-src/Zend/zend_vm_execute.h:119146:2
    #5 0x6874b19 in zend_execute_script /home/w023dtc/nightly_php/php-src/Zend/zend.c:1977:3
    #6 0x5059daa in php_execute_script_ex /home/w023dtc/nightly_php/php-src/main/main.c:2608:13
    #7 0x505aee8 in php_execute_script /home/w023dtc/nightly_php/php-src/main/main.c:2648:9
    #8 0x6889a2a in do_cli /home/w023dtc/nightly_php/php-src/sapi/cli/php_cli.c:952:5
    #9 0x6883e0f in main /home/w023dtc/nightly_php/php-src/sapi/cli/php_cli.c:1363:18
    #10 0x148355702d8f in __libc_start_call_main csu/../sysdeps/nptl/libc_start_call_main.h:58:16

SUMMARY: AddressSanitizer: 7 byte(s) leaked in 1 allocation(s).

But I expected this output instead:

PHP Version

nightly

Operating System

ubuntu 20.04

[devnexen]

Duplicate #17154