Bug #79927 [Com]: Generator doesn't throw exception after multiple yield from iterable

Edit report at https://bugs.php.net/bug.php?id=79927&edit=1 ID: 79927 Comment by: roxblnfk at yandex dot com Reported by: roxblnfk at yandex dot com Summary: Generator doesn't throw exception after multiple yield from iterable Status: Closed Type: Bug Package: Scripting Engine problem Operating System: any PHP Version: 7.4.8 Assigned To: nikic Block user comment: N Private report: N New Comment: I think those who wrote the generator rewind code did it with the behavior described in the documentation. I wrote the code too, expecting and considering that the generator would throw an exception. The incorrect behavior was found only during testing. I, of course, do not insist, but think that it is worth releasing a fix for php7 and writing a warning in the patch note. Now php7 does not work as it is written in the documentation regarding Generator::rewind() Previous Comments: ------------------------------------------------------------------------ [2020-10-11 00:08:29] requinix@php.net That's right. Because it would not be polite if code that already runs in 7.4 suddenly started throwing exceptions with the next release. ------------------------------------------------------------------------ [2020-10-10 21:15:09] roxblnfk at ya dot ru Do i understand correctly that this bug will not be fixed for php 7? ------------------------------------------------------------------------ [2020-08-11 13:49:53] nikic@php.net Automatic comment on behalf of nikita.ppv@gmail.com Revision: http://git.php.net/?p=php-src.git;a=commit;h=e25aab64268adb4e233737c274b195e1662f7211 Log: Fixed bug #79927 ------------------------------------------------------------------------ [2020-08-03 21:14:46] roxblnfk at yandex dot com Description: ------------ A generator that yields values from an array does not throw an exception when calling the rewind method after multiple yields from same yield construction. Can also be seen at https://3v4l.org/NZ77U Test script: --------------- <?php $generator = (static function () { yield from [1,2,3]; })(); $generator->next(); $generator->next(); $generator->rewind(); echo $generator->current(); # 3 Expected result: ---------------- RuntimeException on line $generator->rewind(); Actual result: -------------- 3 ------------------------------------------------------------------------ -- Edit this bug report at https://bugs.php.net/bug.php?id=79927&edit=1