Bug #75630 [NEW]: Narrowing occurred during type inference

From: m dot sevastyanov at s7 dot ru Operating system: Linux/Windows PHP version: 7.1.12 Package: opcache Bug Type: Bug Bug description:Narrowing occurred during type inference Description: ------------ We get these strange errors when trying to require() or include() some classes. I managed to extract some script part enough to reproduce it. Test script: --------------- php.ini: opcache.enable_cli=1 narrowing.php: <?php class TestClass { public function test() { $seqs = []; foreach ([] as $row) { foreach ($seqs as $i => $seq) $seqs[$i][] = 0; $seqs[] = 0; } } } php -c php.ini narrowing.php Expected result: ---------------- no warning/error Actual result: -------------- Warning: Narrowing occurred during type inference. Please file a bug report on bugs.php.net in Unknown on line 0 -- Edit bug report at https://bugs.php.net/bug.php?id=75630&edit=1 -- Try a snapshot (PHP 5.4): https://bugs.php.net/fix.php?id=75630&r=trysnapshot54 Try a snapshot (PHP 5.5): https://bugs.php.net/fix.php?id=75630&r=trysnapshot55 Try a snapshot (trunk): https://bugs.php.net/fix.php?id=75630&r=trysnapshottrunk Fixed in SVN: https://bugs.php.net/fix.php?id=75630&r=fixed Fixed in release: https://bugs.php.net/fix.php?id=75630&r=alreadyfixed Need backtrace: https://bugs.php.net/fix.php?id=75630&r=needtrace Need Reproduce Script: https://bugs.php.net/fix.php?id=75630&r=needscript Try newer version: https://bugs.php.net/fix.php?id=75630&r=oldversion Not developer issue: https://bugs.php.net/fix.php?id=75630&r=support Expected behavior: https://bugs.php.net/fix.php?id=75630&r=notwrong Not enough info: https://bugs.php.net/fix.php?id=75630&r=notenoughinfo Submitted twice: https://bugs.php.net/fix.php?id=75630&r=submittedtwice register_globals: https://bugs.php.net/fix.php?id=75630&r=globals PHP 4 support discontinued: https://bugs.php.net/fix.php?id=75630&r=php4 Daylight Savings: https://bugs.php.net/fix.php?id=75630&r=dst IIS Stability: https://bugs.php.net/fix.php?id=75630&r=isapi Install GNU Sed: https://bugs.php.net/fix.php?id=75630&r=gnused Floating point limitations: https://bugs.php.net/fix.php?id=75630&r=float No Zend Extensions: https://bugs.php.net/fix.php?id=75630&r=nozend MySQL Configuration Error: https://bugs.php.net/fix.php?id=75630&r=mysqlcfg