Call to a member function getCompilerInfo() on nullobject(Error)#13 (7) { ["message":protected]=> string(51) "Call to a member function getCompilerInfo() on null" ["string":"Error":private]=> string(0) "" ["code":protected]=> int(0) ["file":protected]=> string(53) "/var/www/html/sky/function/problem/problem_submit.php" ["line":protected]=> int(35) ["trace":"Error":private]=> array(3) { [0]=> array(4) { ["file"]=> string(46) "/var/www/html/sky/function/problem/problem.php" ["line"]=> int(46) ["function"]=> string(26) "SKYOJ\Problem\submitHandle" ["args"]=> array(0) { } } [1]=> array(4) { ["file"]=> string(36) "/var/www/html/sky/function/SkyOJ.php" ["line"]=> int(211) ["function"]=> string(27) "SKYOJ\Problem\ProblemHandle" ["args"]=> array(0) { } } [2]=> array(6) { ["file"]=> string(27) "/var/www/html/sky/index.php" ["line"]=> int(12) ["function"]=> string(3) "run" ["class"]=> string(12) "SKYOJ\_SkyOJ" ["type"]=> string(2) "->" ["args"]=> array(0) { } } } ["previous":"Error":private]=> NULL }