Bug #80732 [NEW]: large integer operating addition error when overflow

From: 809721719 at qq dot com Operating system: MacOS 10.14 (64bit) PHP version: 7.4.15 Package: *General Issues Bug Type: Bug Bug description:large integer operating addition error when overflow Description: ------------ The addition of two integers exceeds the maximum value of the integer. After an overflow occurs, the resulting value is distorted. I test in C/C++/Go and got different results from PHP, but they get the same results. Test script: --------------- var_dump(intval(9223372036854775807 + 1)); // int(-9223372036854775808) var_dump(intval(9223372036854775807 + 2)); // int(-9223372036854775808) var_dump(intval(9223372036854775807 + 3)); // int(-9223372036854775808) Expected result: ---------------- int(-9223372036854775808) int(-9223372036854775807) int(-9223372036854775806) Actual result: -------------- int(-9223372036854775808) int(-9223372036854775808) int(-9223372036854775808) -- Edit bug report at https://bugs.php.net/bug.php?id=80732&edit=1 -- Fix committed: https://bugs.php.net/fix.php?id=80732&r=fixed Fixed in release: https://bugs.php.net/fix.php?id=80732&r=alreadyfixed Need backtrace: https://bugs.php.net/fix.php?id=80732&r=needtrace Need Reproduce Script: https://bugs.php.net/fix.php?id=80732&r=needscript Try newer version: https://bugs.php.net/fix.php?id=80732&r=oldversion Not developer issue: https://bugs.php.net/fix.php?id=80732&r=support Expected behavior: https://bugs.php.net/fix.php?id=80732&r=notwrong Not enough info: https://bugs.php.net/fix.php?id=80732&r=notenoughinfo Submitted twice: https://bugs.php.net/fix.php?id=80732&r=submittedtwice register_globals: https://bugs.php.net/fix.php?id=80732&r=globals PHP version support discontinued: https://bugs.php.net/fix.php?id=80732&r=phptooold Daylight Savings: https://bugs.php.net/fix.php?id=80732&r=dst IIS Stability: https://bugs.php.net/fix.php?id=80732&r=isapi Install GNU Sed: https://bugs.php.net/fix.php?id=80732&r=gnused Floating point limitations: https://bugs.php.net/fix.php?id=80732&r=float No Zend Extensions: https://bugs.php.net/fix.php?id=80732&r=nozend MySQL Configuration Error: https://bugs.php.net/fix.php?id=80732&r=mysqlcfg