Bug #71094 [NEW]: readline_completion_function corrupts static array on (second) TAB

From: ml at visu dot li Operating system: Linux PHP version: 7.0.0 Package: Readline related Bug Type: Bug Bug description:readline_completion_function corrupts static array on (second) TAB Description: ------------ Module: readline Function: readline_completion_function Version: PHP 7.0.0 (cli) (built: Dec 9 2015 16:07:56) ( NTS ) In PHP7 a static array containing possible matches for the readline completion that is returned gets corrupted on the second <TAB>. If this static array of possible matches contains a string with a length of >= 16, it is changed to "Closure::__invoke". Other values in the array might simply disappear. (See Test Script Results) Works fine with PHP5 (5.6.12-0+deb8u1), broken in PHP7. I'm not an expert in gdb or debugging of C programs, so please forgive me for not adding a gdb backtrace. Test script: --------------- <?php error_reporting(E_ALL); readline_completion_function(function() { static $possible_matches = array( 'sixteencharacter', // 16 characters or a longer string '1', '2', '3', '4', '5', ); var_dump($possible_matches); return $possible_matches; }); readline(); Expected result: ---------------- array(6) { [0] => string(16) "sixteencharacter" [1] => string(1) "1" [2] => string(1) "2" [3] => string(1) "3" [4] => string(1) "4" [5] => string(1) "5" } array(6) { [0] => string(16) "sixteencharacter" [1] => string(1) "1" [2] => string(1) "2" [3] => string(1) "3" [4] => string(1) "4" [5] => string(1) "5" } 1 2 3 4 5 sixteencharacter Actual result: -------------- array(6) { [0]=> string(16) "sixteencharacter" [1]=> string(1) "1" [2]=> string(1) "2" [3]=> string(1) "3" [4]=> string(1) "4" [5]=> string(1) "5" } array(6) { [0]=> string(17) "Closure::__invoke" [1]=> string(1) "1" [2]=> string(1) "2" [3]=> string(1) "3" [4]=> string(1) "4" [5]=> string(0) "" } 1 2 3 4 Closure::__invoke -- Edit bug report at https://bugs.php.net/bug.php?id=71094&edit=1 -- Try a snapshot (PHP 5.4): https://bugs.php.net/fix.php?id=71094&r=trysnapshot54 Try a snapshot (PHP 5.5): https://bugs.php.net/fix.php?id=71094&r=trysnapshot55 Try a snapshot (trunk): https://bugs.php.net/fix.php?id=71094&r=trysnapshottrunk Fixed in SVN: https://bugs.php.net/fix.php?id=71094&r=fixed Fixed in release: https://bugs.php.net/fix.php?id=71094&r=alreadyfixed Need backtrace: https://bugs.php.net/fix.php?id=71094&r=needtrace Need Reproduce Script: https://bugs.php.net/fix.php?id=71094&r=needscript Try newer version: https://bugs.php.net/fix.php?id=71094&r=oldversion Not developer issue: https://bugs.php.net/fix.php?id=71094&r=support Expected behavior: https://bugs.php.net/fix.php?id=71094&r=notwrong Not enough info: https://bugs.php.net/fix.php?id=71094&r=notenoughinfo Submitted twice: https://bugs.php.net/fix.php?id=71094&r=submittedtwice register_globals: https://bugs.php.net/fix.php?id=71094&r=globals PHP 4 support discontinued: https://bugs.php.net/fix.php?id=71094&r=php4 Daylight Savings: https://bugs.php.net/fix.php?id=71094&r=dst IIS Stability: https://bugs.php.net/fix.php?id=71094&r=isapi Install GNU Sed: https://bugs.php.net/fix.php?id=71094&r=gnused Floating point limitations: https://bugs.php.net/fix.php?id=71094&r=float No Zend Extensions: https://bugs.php.net/fix.php?id=71094&r=nozend MySQL Configuration Error: https://bugs.php.net/fix.php?id=71094&r=mysqlcfg