[GIT-PULLS] [php-src] PR #23415: Fix heap over-read in cli_get_prompt() for empty cli.prompt

[email protected] (iliaal)
Newsgroups php.git-pulls
Message-ID <ntDSH1ZKN6CgA7cYJxfCCmPUCXlFBLKWUc9Z8BSdFpw@main.internal.php.net> 
Pull Request: https://github.com/php/php-src/pull/23415
Author: iliaal

cli_get_prompt() parsed cli.prompt with a do-while, so the empty string executed the body on the terminator and scanned heap past it. Use a while loop and return the interned empty string when nothing was appended.
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