Bug #77489 [NEW]: Yield inside IF instruction

From: hlecorche at e-commit dot fr Operating system: Debian GNU/Linux PHP version: 7.2.14 Package: Scripting Engine problem Bug Type: Bug Bug description:Yield inside IF instruction Description: ------------ When a function has a YIELD instruction inside a IF instruction, the yield instruction is called even if the IF INSTRUCTION is not true. Tested whith 7.0.33, 7.1.26 and 7.2.14 versions. Test script: --------------- function gen_one_to_three($useYield = true) { $result = []; for ($i = 1; $i <= 3; $i++) { if (true === $useYield) { yield $i; } else { $result[] = $i; } } if (false === $useYield) { return $result; } } $return1 = gen_one_to_three(true); echo get_class($return1) $return2 = gen_one_to_three(false); echo get_class($return2); Expected result: ---------------- Generator PHP Warning: get_class() expects parameter 1 to be object, array given Actual result: -------------- Generator Generator -- Edit bug report at https://bugs.php.net/bug.php?id=77489&edit=1 -- Try a snapshot (PHP 5.4): https://bugs.php.net/fix.php?id=77489&r=trysnapshot54 Try a snapshot (PHP 5.5): https://bugs.php.net/fix.php?id=77489&r=trysnapshot55 Try a snapshot (trunk): https://bugs.php.net/fix.php?id=77489&r=trysnapshottrunk Fixed in SVN: https://bugs.php.net/fix.php?id=77489&r=fixed Fixed in release: https://bugs.php.net/fix.php?id=77489&r=alreadyfixed Need backtrace: https://bugs.php.net/fix.php?id=77489&r=needtrace Need Reproduce Script: https://bugs.php.net/fix.php?id=77489&r=needscript Try newer version: https://bugs.php.net/fix.php?id=77489&r=oldversion Not developer issue: https://bugs.php.net/fix.php?id=77489&r=support Expected behavior: https://bugs.php.net/fix.php?id=77489&r=notwrong Not enough info: https://bugs.php.net/fix.php?id=77489&r=notenoughinfo Submitted twice: https://bugs.php.net/fix.php?id=77489&r=submittedtwice register_globals: https://bugs.php.net/fix.php?id=77489&r=globals PHP 4 support discontinued: https://bugs.php.net/fix.php?id=77489&r=php4 Daylight Savings: https://bugs.php.net/fix.php?id=77489&r=dst IIS Stability: https://bugs.php.net/fix.php?id=77489&r=isapi Install GNU Sed: https://bugs.php.net/fix.php?id=77489&r=gnused Floating point limitations: https://bugs.php.net/fix.php?id=77489&r=float No Zend Extensions: https://bugs.php.net/fix.php?id=77489&r=nozend MySQL Configuration Error: https://bugs.php.net/fix.php?id=77489&r=mysqlcfg