Bug #79614 [Dup]: Nested 'yield from' duplicate first element
Edit report at https://bugs.php.net/bug.php?id=79614&edit=1
ID: 79614
User updated by: ponomarev at gmail dot com
Reported by: ponomarev at gmail dot com
Summary: Nested 'yield from' duplicate first element
Status: Duplicate
Type: Bug
Package: Scripting Engine problem
PHP Version: 7.4.6
Assigned To: cmb
Block user comment: N
Private report: N
New Comment:
It seems to be duplicate of #79600
Previous Comments:
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[2020-05-20 18:11:30] requinix@php.net
Duplicate? 78434 fixed an issue where the first generated item wasn't being yielded. This is an
issue where the first generated item is being yielded too many times - and it started after
78434's fix landed in 7.4.6.
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[2020-05-20 07:17:02] cmb@php.net
Well, actually a duplicate of that bug.
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[2020-05-20 02:42:47] requinix@php.net
No doubt related to bug #78434.
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[2020-05-20 02:22:18] ponomarev at gmail dot com
Description:
------------
See the example script.
First element yielded twice if iterate over a generator that yield from another
generator.
Test script:
---------------
https://3v4l.org/2ZQ8d
<?php
$arr = [1,2,3];
function a($x){
yield from $x;
}
foreach(a(a($arr)) as $x){
print_r($x);
}
Expected result:
----------------
123
Actual result:
--------------
1123
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Edit this bug report at https://bugs.php.net/bug.php?id=79614&edit=1
Thread (7 messages)