Bug #67111 [NEW]: Memory leak when using "continue 2" inside two foreach loops

From: thilo at eightysoft dot de Operating system: Debian Jessie, Linux 3.13 PHP version: 5.5.11 Package: Scripting Engine problem Bug Type: Bug Bug description:Memory leak when using "continue 2" inside two foreach loops Description: ------------ When using the short example script below, the script dies from memory consumption going too high. Every "continue 2" statement seems to leak 8MB of memory in this example. The amount of memory being leaked depends on the number of elements in the $data array. Fewer elements --> smaller amount of memory being leaked. Test script: --------------- <?php $data=array(); for($c=0; $c<32768; $c++) $data[$c]=array(1, 2, 3); $filter=array(1, 2, 3); for($kc=0; $kc<25600; $kc++) { $cm=memory_get_usage(true); $pm=memory_get_peak_usage(true); echo "<b>loop $kc: current_memory: $cm, peak_memory: $pm...</b><br>"; flush(); foreach($data as $entry) foreach($filter as $pattern) continue 2; } ?> Expected result: ---------------- I expect to see the script running till $kc in the outer for loop reaches 25600 and then terminate. The consumed memory should stay (nearly?) constant throughout the script execution. Actual result: -------------- loop 0: current_memory: 12582912, peak_memory: 12582912... loop 1: current_memory: 20709376, peak_memory: 20709376... loop 2: current_memory: 28835840, peak_memory: 28835840... loop 3: current_memory: 36962304, peak_memory: 36962304... loop 4: current_memory: 45088768, peak_memory: 45088768... loop 5: current_memory: 53215232, peak_memory: 53215232... loop 6: current_memory: 61341696, peak_memory: 61341696... loop 7: current_memory: 69468160, peak_memory: 69468160... loop 8: current_memory: 77594624, peak_memory: 77594624... loop 9: current_memory: 85721088, peak_memory: 85721088... loop 10: current_memory: 93847552, peak_memory: 93847552... loop 11: current_memory: 101974016, peak_memory: 101974016... loop 12: current_memory: 110100480, peak_memory: 110100480... loop 13: current_memory: 118226944, peak_memory: 118226944... loop 14: current_memory: 126353408, peak_memory: 126353408... loop 15: current_memory: 134479872, peak_memory: 134479872... loop 16: current_memory: 142606336, peak_memory: 142606336... loop 17: current_memory: 151257088, peak_memory: 151257088... loop 18: current_memory: 159383552, peak_memory: 159383552... loop 19: current_memory: 167510016, peak_memory: 167510016... loop 20: current_memory: 175636480, peak_memory: 175636480... loop 21: current_memory: 183762944, peak_memory: 183762944... loop 22: current_memory: 191889408, peak_memory: 191889408... loop 23: current_memory: 200015872, peak_memory: 200015872... loop 24: current_memory: 208142336, peak_memory: 208142336... loop 25: current_memory: 216268800, peak_memory: 216268800... loop 26: current_memory: 224395264, peak_memory: 224395264... loop 27: current_memory: 232521728, peak_memory: 232521728... loop 28: current_memory: 240648192, peak_memory: 240648192... loop 29: current_memory: 248774656, peak_memory: 248774656... loop 30: current_memory: 256901120, peak_memory: 256901120... loop 31: current_memory: 265027584, peak_memory: 265027584... Fatal error: Allowed memory size of 268435456 bytes exhausted (tried to allocate 40 bytes) in -- Edit bug report at https://bugs.php.net/bug.php?id=67111&edit=1 -- Try a snapshot (PHP 5.4): https://bugs.php.net/fix.php?id=67111&r=trysnapshot54 Try a snapshot (PHP 5.5): https://bugs.php.net/fix.php?id=67111&r=trysnapshot55 Try a snapshot (trunk): https://bugs.php.net/fix.php?id=67111&r=trysnapshottrunk Fixed in SVN: https://bugs.php.net/fix.php?id=67111&r=fixed Fixed in release: https://bugs.php.net/fix.php?id=67111&r=alreadyfixed Need backtrace: https://bugs.php.net/fix.php?id=67111&r=needtrace Need Reproduce Script: https://bugs.php.net/fix.php?id=67111&r=needscript Try newer version: https://bugs.php.net/fix.php?id=67111&r=oldversion Not developer issue: https://bugs.php.net/fix.php?id=67111&r=support Expected behavior: https://bugs.php.net/fix.php?id=67111&r=notwrong Not enough info: https://bugs.php.net/fix.php?id=67111&r=notenoughinfo Submitted twice: https://bugs.php.net/fix.php?id=67111&r=submittedtwice register_globals: https://bugs.php.net/fix.php?id=67111&r=globals PHP 4 support discontinued: https://bugs.php.net/fix.php?id=67111&r=php4 Daylight Savings: https://bugs.php.net/fix.php?id=67111&r=dst IIS Stability: https://bugs.php.net/fix.php?id=67111&r=isapi Install GNU Sed: https://bugs.php.net/fix.php?id=67111&r=gnused Floating point limitations: https://bugs.php.net/fix.php?id=67111&r=float No Zend Extensions: https://bugs.php.net/fix.php?id=67111&r=nozend MySQL Configuration Error: https://bugs.php.net/fix.php?id=67111&r=mysqlcfg