Bug #73954 [Fbk]: NAN check fails on Alpine Linux with musl

Edit report at https://bugs.php.net/bug.php?id=73954&edit=1 ID: 73954 Updated by: ajf@php.net Reported by: zaq178miami at gmail dot com Summary: NAN check fails on Alpine Linux with musl Status: Feedback Type: Bug Package: *General Issues Operating System: Alpine Linux PHP Version: Irrelevant Assigned To: cmb Block user comment: N Private report: N New Comment: It doesn't use ZPP-the-function, yes, but typehints for userland and internal functions inherit their handling of NaN for integer parameters from ZPP (and actually share the code for this with ZPP internally), which is why I linked the OP to that RFC. Previous Comments: ------------------------------------------------------------------------ [2017-01-17 20:05:30] alex dot masterow at gmail dot com I also know about this problem. > What do you get with the following script with musl: > var_dump(chr(NAN)); string(1) "" Unicode: U+0000 HTML: &#0; ------------------------------------------------------------------------ [2017-01-17 17:49:36] cmb@php.net This has nothing to do with ZPP, because it's a userland function. What do you get with the following script with musl: <?php var_dump(chr(NAN)); ------------------------------------------------------------------------ [2017-01-17 08:53:33] zaq178miami at gmail dot com Description: ------------ It seems to be that is_nan check fails or sth like that as when passing NAN to as an int parameter it silently casted to int(0). While int(0) is valid result for explicit (int)NAN cast, according to Andrea (https://wiki.php.net/rfc/zpp_fail_on_overflow). As already discussed on SO (http://chat.stackoverflow.com/transcript/message/35136128#35136128) it might be just a musl bug, but maybe we should check what NAN do we have and maybe alter config scripts and/or php_get_nan() accordingly? Here is runnable snippet: https://3v4l.org/m7hpq Test script: --------------- <?php function test(int $test) { var_dump($test); } test(NAN); Expected result: ---------------- Fatal error: Uncaught TypeError: Argument 1 passed to test() must be of the type integer, float given, called in /in/m7hpq on line 6 and defined in /in/m7hpq:2 Stack trace: #0 /in/m7hpq(6): test(NAN) #1 {main} thrown in /in/m7hpq on line 2 Actual result: -------------- int(0) ------------------------------------------------------------------------ -- Edit this bug report at https://bugs.php.net/bug.php?id=73954&edit=1